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DC Circuit Breaker 3P 750V 125A | KYDB-125-3P
Kuangya KYDB-125-3P is a dc circuit breaker 3p 750v 125a, available in 63A / 80A / 100A / 125A.
Provides triple-pole overload & short-circuit protection at 750VDC with 6kA breaking capacity.
IEC 60947-2 certified, DIN-rail breaker for PV, ESS, and industrial DC systems.
Overview
The dc circuit breaker 3p 750v 125a (model KYDB-125-3P) is a three-pole miniature DC breaker designed for large-scale PV arrays, ESS DC buses, and industrial DC distribution panels. Rated at 750VDC with current options of 63A / 80A / 100A / 125A, it delivers overload and short-circuit protection with a 6kA breaking capacity. With Ui 690V and Uimp 6kV, it provides robust insulation and long service life.
Key Features
- Rated voltage: 750VDC (3P); frame current: 125A
- Current options: 63A / 80A / 100A / 125A
- Breaking capacity: 6kA (Icn/Ics)
- Trip characteristics: C / D, thermal-magnetic
- Insulation & impulse: Ui 690V; Uimp 6kV
- Endurance: Mechanical life 20,000 ops; Electrical life 2,000 ops
- Compliance: IEC 60947-2, GB/T 14048.2; CE & UL
- Works with PV combiner boxes, DC fuses, DC SPDs, and DC switch disconnectors
Specifications
| Model | KYDB-125-3P |
|---|---|
| Poles | 3P |
| Rated Current (In) | 63A / 80A / 100A / 125A |
| Rated Voltage (Ue) | 750VDC |
| Rated Insulation Voltage (Ui) | 690V |
| Impulse Withstand Voltage (Uimp) | 6kV |
| Breaking Capacity (Icn/Ics) | 6kA / 6kA |
| Trip Characteristics | C / D |
| Mechanical Life | 20,000 operations |
| Electrical Life | 2,000 operations |
| Installation | DIN-rail, width 54mm (18mm × 3 poles) |
| Standards | IEC 60947-2, GB/T 14048.2 |
Wiring Diagram & Dimensions
Applications
- Large-scale solar PV arrays
- Energy storage system (ESS) DC buses
- Industrial DC distribution panels
- Telecom and infrastructure DC systems
FAQ
Q1: What is a dc circuit breaker 3p 750v 125a?
A1: It is a three-pole miniature DC breaker rated at 750VDC and up to 125A, designed for overload and short-circuit protection.
Q2: What current ratings are available?
A2: KYDB-125-3P supports 63A, 80A, 100A, and 125A.
Q3: What is the breaking capacity?
A3: The breaker provides 6kA breaking capacity (Icn/Ics).
Q4: Can it be used in PV and ESS systems?
A4: Yes, this dc circuit breaker 3p 750v 125a is commonly applied in PV combiner boxes and ESS DC systems.
Q5: Which standards does KYDB-125-3P comply with?
A5: It complies with IEC 60947-2, GB/T 14048.2, CE, and UL certifications.
Get a Quote
Contact Kuangya for datasheets, wiring diagrams, or OEM customization of KYDB-125-3P.
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