SPD 제조업체로부터 어떤 서류를 요청해야 할까요? 구매자 체크리스트

서지 보호 장치(SPD) 데이터시트는 인상적인 등급을 보여줄 수 있지만, 제품이 실제로 프로젝트 요구 사항을 충족하는지 어떻게 확인할 수 있을까요?

전기 유통업체, 수입업체, OEM 제조업체 및 태양광 EPC 계약업체의 경우, SPD 공급업체를 선택하는 것은 가격이나 방전 전류 등급을 비교하는 것 이상을 포함합니다.

공급업체는 최대 방전 전류 40kA의 Type 2 SPD를 인용할 수 있습니다. 다른 공급업체는 CE 관련 문서, 시험 보고서 또는 ISO 9001 인증서를 제공할 수 있습니다.

하지만 이러한 문서들이 모두 같은 것을 증명하는 것은 아닙니다.

시험 보고서는 다른 모델을 참조할 수 있습니다. 인증서는 특정 구성만 다룰 수 있습니다. 데이터시트는 중요한 설치 요구 사항을 누락할 수 있습니다.

가장 중요한 질문은 SPD 제조업체가 얼마나 많은 문서를 제공할 수 있는지 여부가 아니라, 해당 문서가 정확한 제품이 귀하의 애플리케이션에 적합함을 입증하는지 여부입니다.

이 가이드는 9가지 필수 SPD 제조업체 문서, 해당 내용 검증 방법, 그리고 주문 전에 구매자가 배울 수 있는 실제 제조업체 문서에 대해 설명합니다.

빠른 답변: SPD 제조업체로부터 어떤 문서를 요청해야 합니까?

최소한 구매자는 모델별 데이터시트, 적용 가능한 테스트 증거 및 설치 지침을 받아야 합니다. 추가적인 선언, 인증, 품질 기록 및 상업 문서는 제품, 대상 시장 및 구매 요구 사항에 따라 달라집니다.

표 1. SPD 제조업체 문서 체크리스트

문서	주요 용도	요청 시기
제품 데이터시트	전압, SPD 유형, 방전 등급 및 모델 확인	견적 승인 전
IEC/EN 또는 해당 시험 보고서	성능 및 안전 증거 검토	기술 승인 전
적합성 선언서	관련 규정 준수 여부 확인	대상 시장에서 요구하는 경우
제3자 인증	독립 인증 및 적용 모델 확인	사용 가능하거나 요구되는 경우
설치 설명서	배선, 백업 보호 및 설치 조건 확인	샘플 설치 전
기계 도면	물리적 및 장착 호환성 확인	패널 설계 승인 전
공장 품질 검사 기록	생산 일관성 평가	대량 생산 전
제품 추적성 및 보증	배치 식별 및 사후 관리 책임	구매 주문 전
상업 및 운송 서류	선적, 수량 및 수입 정보 확인	주문 및 선적 중

모든 구매자가 모든 문서를 필요로 하는 것은 아닙니다.

예를 들어, 유럽의 전기 유통업체는 EU 적합성 선언을 우선시할 수 있으며, 태양광 EPC 계약업체는 태양광 발전 관련 특정 시험 증거 및 설치 요구 사항을 더 강조할 수 있습니다.

다음 섹션에서는 결정 방법을 설명합니다.

---

1. 제품 데이터시트: 실제 SPD 등급 확인

기술 데이터시트는 모든 SPD 구매 결정의 시작점입니다.

그러나 좋은 데이터시트는 몇 가지 매력적인 사양을 표시하는 것 이상을 해야 합니다.

설치될 전기 시스템에 장치가 적합한지 평가할 수 있는 충분한 정보를 제공해야 합니다.

표 2. 필수 SPD 데이터시트 매개변수

매개변수	의미	구매자가 확인해야 할 사항
Uc	최대 연속 동작 전압	전기 시스템에 적합
Ucpv	Maximum continuous operating voltage for a PV SPD	Suitable for maximum PV array voltage
In	공칭 방전 전류	Declared value and test waveform
Imax	최대 방전 전류	Applicable Type 2 impulse rating
Iimp	Impulse discharge current	Type 1 capability where applicable
Up	전압 보호 레벨	Appropriate for equipment protection
Isccr / SCCR	Short-circuit current rating	Matches prospective fault conditions
Iscpv	PV short-circuit current characteristic	Appropriate for the PV application
보호 모드	Protected conductor combinations	Compatible with system topology
Remote signaling	Status monitoring capability	Terminal arrangement and contact ratings

Not all parameters apply to every SPD.

A Type 2 AC SPD and a Type 1+2 photovoltaic DC SPD can require different technical information.

Buyers should therefore avoid evaluating all SPDs with a single generic parameter checklist.

For a deeper explanation of installation and voltage requirements, see our guide to solar inverter built-in and external SPDs.

Real Product Example: Phoenix Contact Type 2 SPD

Phoenix Contact publishes a detailed technical specification for its VAL-MS 230/3+1 FM/32, order number 2908476.

Its publicly listed characteristics include:

Table 3. Published Phoenix Contact SPD Data

매개변수	Published value
제품	VAL-MS 230/3+1 FM/32
Order number	2908476
SPD 유형	유형 2
공칭 시스템 전압	240/415 V AC
Uc, L-N	275 V AC
In(8/20 µs)	20 kA
아이맥스(8/20 µs)	40 kA
Up, L-N	≤ 1.35 kV
Up, L-PE	≤ 1.6 kV
Short-circuit current rating	25 kA

출처: Phoenix Contact — VAL-MS 230/3+1 FM/32 Official Product Data

What makes this example useful?

The manufacturer does not describe the product simply as a “40 kA SPD.”

It publishes voltage characteristics, separate protection-mode values, electrical system compatibility, and short-circuit information.

These details matter when engineers compare products.

Buyer’s lesson: Two SPDs with the same Imax value may have different protection levels, operating voltages, protection modes, and short-circuit ratings.

A purchasing decision based only on “20 kA” or “40 kA” is incomplete.

---

2. Test Reports: Verify the Applicable IEC Standard

An SPD test report provides evidence concerning the performance and safety evaluation of a tested product.

However, an IEC reference on a document does not automatically mean that the product has been independently certified.

The first step is identifying which standard applies.

Table 4. Important IEC Standards for SPD Buyers

표준	애플리케이션	Important scope information
IEC 61643-01:2024	General SPD requirements	Common requirements and test methods
IEC 61643-11:2025	AC low-voltage power SPDs	AC circuits rated up to 1,000 V RMS
IEC 61643-31:2018	Photovoltaic DC SPDs	DC side of PV installations up to 1,500 V DC

Official references:

• IEC 61643-11:2025 — AC Low-Voltage SPDs
• IEC 61643-31:2018 — PV Surge Protective Devices

IEC 61643-11:2025 was published on June 18, 2025, and includes revised requirements relating to AC SPD performance and safety testing.

IEC 61643-31:2018 specifically addresses SPDs intended for the DC side of photovoltaic installations up to 1,500 V DC.

These are different application categories.

Why Does the Standard Matter?

Consider a buyer sourcing a 1,500 V DC SPD for a utility-scale solar project.

The supplier presents a test report referring only to IEC 61643-11.

Should the buyer accept it?

Not without further clarification.

IEC 61643-11 addresses AC low-voltage power systems, while IEC 61643-31 provides the photovoltaic DC-specific requirements.

A supplier may have additional relevant testing documentation, but the buyer should confirm the applicable assessment for the offered PV model.

Table 5. Test Report Verification Checklist

Checkpoint	Acceptable evidence	Warning sign
Model number	Offered model is covered	Only another product is listed
표준	Relevant standard and edition	Incorrect application standard
Laboratory	Identifiable testing organization	Laboratory details missing
Report number	Traceable report identifier	Incomplete or untraceable reference
Ratings	Consistent with product datasheet	Different voltage or current values
Model family	Documented scope or annex	Coverage is only assumed
Test results	Relevant evaluation results provided	Only a cover page is supplied
Report limitations	Conditions and exclusions are understood	Important annexes are missing

중요: A report issued under an older edition is not automatically invalid. Buyers should check the accepted edition for their destination market, customer specification, and certification arrangement.

---

3. CE Marking and Declaration of Conformity: Know the Difference

One of the most common problems in international electrical product procurement is confusion over CE documentation.

Some buyers request a “CE certificate” without specifying which document they actually need.

However, CE marking, an EU Declaration of Conformity, and independent third-party certification are not interchangeable.

Real Regulatory Example: European Commission Guidance

The European Commission explains that the manufacturer is responsible for conformity assessment, preparing technical documentation, issuing the EU Declaration of Conformity, and applying CE marking where applicable.

CE marking itself does not indicate that an EU authority has approved the product.

출처: European Commission — CE Marking and Manufacturer Responsibilities

Table 6. CE Marking vs DoC vs Third-Party Certification

Document or marking	Who is responsible?	What it demonstrates
CE 마크	제조업체	Manufacturer’s declaration of conformity with applicable EU requirements
EU Declaration of Conformity	Manufacturer or responsible authorized party	Formal declaration identifying applicable EU legislation
Supporting technical file	제조업체	Evidence supporting the conformity assessment
Third-party product certificate	Relevant certification organization	Certification within the specific scheme and product scope
ISO 9001 certificate	Quality management certification body	Quality management system certification, not individual SPD product compliance

A product marked CE should not automatically be described as “EU-certified.”

Similarly, ISO 9001 does not establish that an individual SPD model meets IEC 61643 requirements.

What Should Buyers Check on an EU DoC?

Review the product identification, manufacturer details, relevant EU legislation, applicable standards or technical specifications, issue information, and signature.

For European shipments, the documents and responsibilities must meet the legal requirements applying to the product and market.

A generic certificate cannot replace these obligations.

Practical recommendation: Ask the supplier for the Declaration of Conformity applicable to the exact product rather than relying on a CE logo printed on its packaging.

---

4. Third-Party Certificates: Check the Model, Not Just the Brand

Independent certification can be valuable, particularly for regulated markets or projects with strict technical approval procedures.

Buyers may encounter IECEE CB Scheme documents, UL certification records, TÜV-issued certificates, and national product approvals.

However, the relevant certification depends on the applicable market and scheme.

Table 7. Third-Party Certification Review

항목	What to verify	중요한 이유
Certificate number	Officially traceable	Helps establish authenticity
Certificate holder	Identified legal entity	May differ from the trading company
제조업체	Actual product manufacturer	Confirms manufacturing relationship
Factory location	Covered production location	Important for certain certification schemes
Product model	Exact model or listed family	Prevents unsupported model claims
표준	Applicable technical requirements	Confirms relevance
Certificate status	Current status and restrictions	Certification scope can change
Annexes	Covered variants and ratings	Important for multipole and OEM models

Real Verification Example: UL Product iQ

UL Solutions provides Product iQ, an official database for searching UL certification information.

Users can search using information such as a file number, product category, or other product identifiers.

Official source: UL Solutions — Product iQ Certification Database

For example, a buyer receiving a claimed UL certification can check whether the relevant product or component appears within the applicable UL certification records.

The buyer should also check the covered models and product category rather than assuming certification applies to the entire manufacturer’s catalog.

Buyer’s lesson: A certificate from a recognized organization is valuable only when its scope applies to the product being purchased.

---

5. Installation Instructions: Check More Than the Wiring Diagram

An SPD can have suitable electrical ratings and still be inappropriate for a particular installation if its connection and protection requirements are not followed.

A complete installation guide helps electrical engineers verify the correct arrangement.

Table 8. Installation Documents Buyers Should Review

Installation information	중요한 이유
Connection diagram	Confirms the correct electrical arrangement
Earthing and protection modes	Supports proper surge diversion paths
Backup fuse or circuit breaker	Ensures protective-device coordination
Maximum upstream protection	Helps determine whether additional protection is required
Short-circuit conditions	Helps assess suitability for available fault current
터미널 토크	Supports proper electrical connections
도체 단면적	Helps confirm compatible wiring
Mechanical mounting	Prevents panel assembly conflicts
Status indication	Supports maintenance and replacement decisions
Remote signaling contacts	Supports external alarm or monitoring integration

Real Manufacturer Example: DEHN Technical Data

DEHN’s published documentation for its DEHNguard M TNS ACI 275 FM, part number 952 440, identifies several important characteristics.

Table 9. Published DEHN SPD Example

매개변수	Published value
모델	DG M TNS ACI 275 FM
Part number	952 440
SPD 유형	유형 2
Uc (L-PE)	275 V AC
In(8/20 µs)	20 kA
Up (L-PE)	≤ 1.5kV
Additional external fuse	필요 없음

출처: DEHN — DEHNguard ACI Product Technical Documentation (PDF)

This example illustrates an important purchasing consideration.

Not every SPD requires a separate external backup fuse.

The correct protection arrangement depends on the specific product design, tested configuration, and manufacturer instructions.

A buyer should therefore never select backup protection simply because another Type 2 SPD uses a particular fuse rating.

For further technical guidance, read our SPD backup fuse and circuit breaker selection guide.

---

6. Technical Drawings: Avoid Mechanical Compatibility Problems

For panel builders and OEM customers, mechanical compatibility can be as important as electrical performance.

An SPD may satisfy the required electrical specifications but still cause problems during panel assembly.

For example, an alternative model may occupy a different DIN-rail width or use a different terminal arrangement.

Technical Drawing Requirements

Document detail	애플리케이션
Overall dimensions	Enclosure layout
DIN 레일 장착	Mechanical compatibility
Terminal positions	케이블 라우팅
Required clearances	Installation planning
Module width	Panel space calculation
Remote contact location	Monitoring wiring
Replaceable module structure	Maintenance planning

Buyers should also confirm whether the product delivered during bulk production matches the approved sample and drawings.

This is particularly relevant for OEM distribution boards, PV combiner boxes, and standardized industrial control panels.

---

7. Factory Quality Records: What Happens After Type Testing?

A type-test report provides evidence of a product design evaluated under specified conditions.

It does not automatically establish that every production unit has been manufactured without defects.

This is why factory quality management and traceability are important for larger procurement projects.

Table 10. Factory Quality Documents and Their Purpose

문서	What buyers can learn
Incoming inspection records	How critical materials are checked
Routine inspection procedures	Which tests or checks occur during production
Final inspection records	How finished products are evaluated
Batch identification	Whether affected production lots can be traced
Nonconformity reports	How production defects are handled
Corrective-action records	Whether identified problems lead to improvements
Quality management certificate	Whether a documented management system is certified

The exact routine tests and acceptance criteria should be defined by the relevant product requirements and supplier’s quality procedures.

Buyers should avoid assuming that a factory holding ISO 9001 certification has automatically obtained product certification for every SPD it manufactures.

Practical Factory Audit Example

Suppose a distributor plans to purchase 5,000 SPDs under a private label.

Before approving mass production, the buyer could request:

• The approved model datasheet and label drawing.
• A production inspection plan.
• A sample batch inspection record.
• A method for linking production batches to finished products.
• A documented change-notification procedure.

This is an illustrative procurement scenario, not a claim about a particular manufacturer’s inspection results.

The objective is to verify whether the supplier can consistently manufacture the approved product.

---

8. OEM and Private-Label Documentation: Does the Certificate Still Apply?

Private-label SPD procurement introduces additional documentation questions.

A distributor may purchase an existing SPD design under its own brand with a different printed model number.

However, a new logo does not automatically mean the branded version is independently certified.

Equally, the existence of an original manufacturer’s certificate does not automatically establish that every private-label variation is covered.

Table 11. OEM Documentation Risks

OEM change	What buyers should confirm
Brand name change	Relationship to the assessed product
Model number change	Documented model equivalence
Label redesign	Required technical and regulatory markings
Enclosure change	Whether existing assessment remains applicable
Internal component change	Whether additional technical evaluation is needed
Manufacturing location change	Whether certification or approval scope is affected
Wiring modification	Compatibility with original testing and installation instructions

Before approving an OEM order, request the approved product specification, label artwork, applicable test evidence, and written confirmation of any model-equivalence arrangement.

Where a third-party certification is claimed, confirm that the relevant certification scheme permits the proposed configuration and labeling.

---

9. Commercial Documents: Ensure the Approved Product Is the Shipped Product

Technical approval should continue through the purchasing and shipping process.

A mismatch between the approved model and the commercial documents can create customs, project acceptance, or inventory problems.

Commercial Documentation Checklist

문서	What to verify
Proforma Invoice	Approved model, quantity, price and trade terms
Commercial Invoice	Correct shipment details and product descriptions
Packing List	Package count, quantities, weights and dimensions
Certificate of Origin	Origin information when required
Bill of Lading / Air Waybill	Consistent shipment information
Inspection report	Agreed production or shipment checks
Warranty terms	Responsibility for eligible claims

A Certificate of Origin is a trade document. It does not establish an SPD’s electrical safety or performance.

Likewise, an inspection report covering packaging and quantity does not replace a laboratory test report.

---

Real-World Evidence: What Three Official Sources Teach SPD Buyers

The following examples are drawn from public manufacturer and regulatory documents. They are not estimates of field failure rates or unverified customer stories.

Table 12. Evidence-Based SPD Purchasing Lessons

Official example	Verified information	Purchasing lesson
Phoenix Contact VAL-MS 230/3+1 FM/32	In 20 kA, Imax 40 kA, mode-specific Up values	Compare complete electrical characteristics, not one rating
DEHNguard M TNS ACI 275 FM	Manufacturer indicates no additional external fuse required	Installation requirements are model-specific
European Commission CE guidance	Manufacturer is responsible for EU conformity assessment and DoC	CE marking is not equivalent to independent product certification

These examples highlight three different areas of risk:

Technical risk: Selecting a product based on incomplete specifications.

Installation risk: Applying protection requirements from another SPD model.

Documentation risk: Misinterpreting what a compliance document actually proves.

Reliable SPD procurement should address all three.

---

How to Audit an SPD Supplier in 7 Steps

The most efficient documentation process is to review information in stages, rather than requesting every possible file without a clear purpose.

Step 1: Define the Electrical Application

Identify the AC or DC system, maximum operating voltage, required SPD Type, installation location, and destination market.

Step 2: Request the Exact Datasheet

Confirm the quoted model and its electrical ratings.

Step 3: Review Applicable Test Evidence

Check the relevant standards, model coverage, test organization, and report details.

Step 4: Verify Regulatory Documents

Check declarations and certificates required for the intended market.

Step 5: Confirm Installation Compatibility

Review the manufacturer’s wiring, short-circuit, backup protection, terminal, and mounting requirements.

Step 6: Approve the Production Reference

For repeat or OEM orders, retain approved drawings, labels, specifications, and quality criteria.

Step 7: Check Documents Before Shipment

Confirm that invoices, packing lists, and product identification correspond to the approved order.

Table 13. Recommended Timing for SPD Document Requests

Purchasing stage	Documents to prioritize
Initial inquiry	Datasheet and model identification
Supplier comparison	Test evidence and relevant certifications
Technical approval	Installation manual and mechanical drawings
샘플 평가	Label, configuration and sample inspection
Purchase order	Warranty, traceability and approved specifications
Production	Agreed quality and inspection records
Shipment	Commercial Invoice, Packing List and transport documents

This staged approach can reduce unnecessary communication while keeping critical technical checks ahead of the purchase decision.

---

Common SPD Documentation Red Flags

Not every missing document means a supplier is unreliable. Some reports may be confidential, market-specific, or held by an external certification body.

However, unresolved inconsistencies are a legitimate reason to delay technical approval.

Table 14. Warning Signs and Recommended Actions

Warning sign	Potential issue	권장 조치
Certificate covers a different model	Unclear product coverage	Request scope or annex
Datasheet and label disagree	Specification inconsistency	Confirm approved revision
Only a CE logo is provided	Insufficient compliance information	Request applicable DoC
PV SPD has only AC evidence	Application mismatch	Request relevant PV test evidence
Certificate number cannot be verified	Authenticity or status uncertainty	Check with issuer
Installation guide omits protection requirements	Incomplete installation information	Request model-specific instructions
OEM model is absent from documents	Unclear branding relationship	Request equivalence evidence
No production traceability information	Difficult batch investigation	Agree on traceability process
Production differs from approved sample	Uncontrolled design change	Investigate before shipment

---

Ready-to-Use Email: Request Documents From an SPD Manufacturer

Subject: Request for SPD Technical Documents and Model Verification

Hello,

We are reviewing surge protective devices for an upcoming project and would like to verify the technical documentation for your quoted models.

Could you please provide the following?

1. Complete product datasheets
2. Applicable IEC/EN test reports
3. Declaration of Conformity, where applicable
4. Available third-party certification information
5. Installation manuals and wiring diagrams
6. Mechanical dimension drawings
7. Quality inspection information
8. Warranty and product traceability details

Please confirm that the supplied documents cover the exact model numbers, voltage ratings, and configurations included in your quotation.

Thank you.

---

자주 묻는 질문

What are the most important SPD manufacturer documents?

The essential starting documents are a model-specific datasheet, applicable test evidence, and installation instructions.

Additional documentation depends on the installation, destination market, project specification, and purchasing requirements.

Does an SPD need a CE certificate?

For products subject to applicable EU CE-marking legislation, the manufacturer must fulfill the relevant conformity requirements, including the applicable declaration and technical documentation obligations.

A separately marketed “CE certificate” is not necessarily a legally required or sufficient conformity document.

Is IEC 61643-11 suitable for photovoltaic DC SPDs?

IEC 61643-11 addresses AC low-voltage surge protective devices.

IEC 61643-31 is the relevant product standard for SPDs intended for the DC side of photovoltaic installations within its scope.

Is an ISO 9001 certificate enough to approve an SPD manufacturer?

아니요.

ISO 9001 concerns quality management systems and does not replace model-specific technical evaluation or product conformity evidence.

Can a single test report cover multiple SPD models?

Potentially, where the assessment or certification scope explicitly includes the relevant models and configurations.

Buyers should verify model-family coverage rather than assume it.

Should buyers request every test report before ordering samples?

꼭 그렇지는 않습니다.

Start with the key documents needed for technical evaluation. More detailed evidence can be requested based on project requirements, order size, and supplier qualification procedures.

How can buyers verify an SPD certificate?

Check the issuing organization, certificate number, model coverage, applicable standard, and certification status. Use the certification body’s official records where available.

---

Conclusion: Buy Verified Performance, Not Just Specifications

The most valuable SPD manufacturer documents are those that help buyers connect three things:

The actual product being offered.

The performance and compliance evidence supporting that product.

The installation and production conditions under which it will be used.

A complete supplier qualification process should evaluate product specifications, applicable testing, certification scope, installation compatibility, and manufacturing consistency.

The objective is not to collect the largest number of certificates.

It is to obtain the right evidence for the right SPD.

For buyers comparing Chinese SPD manufacturers, our guide to evaluating SPD suppliers in China provides additional supplier-selection considerations.

Looking for AC or DC Surge Protective Devices?

쿠앙야 supplies surge protective devices and related low-voltage electrical protection products for international customers, distributors, and OEM projects.

Tell us your application, SPD Type, system voltage, destination market, and required specifications.

Our team can help discuss suitable products and the model-specific technical documentation available for review.

Visit KUANGYA — www.cnkuangya.com

Technical note: Standards, certification scopes, and regulatory requirements may change. Always verify the applicable editions and approval requirements for the intended market and exact product model.