AC MCB — Miniature Circuit Breakers

Compact protection for 230/400 VAC distribution — B/C/D curves, 6–125 A (by model).
6 kA / 10 kA breaking capacity options; DIN rail EN 60715; IP20 finger-safe terminals.
Designed according to IEC 60898-1 (final circuits) and IEC 60947-2 (industrial, by model).

개요

Kuangya AC MCBs protect branch circuits against overloads and short circuits in residential, commercial, and light-industrial panels. The range covers single-pole to four-pole configurations with B, C, or D tripping curves to match load characteristics from lighting and socket circuits to motor and transformer feeders. Tool-free DIN-rail mounting, front wiring access, and compact footprints simplify new installations and retrofits alike.

주요 기능

Ratings: 6–125 A (by model), 230/400 VAC, 50/60 Hz.
Breaking capacity: 6 kA or 10 kA at 230/400 VAC (by model).
Tripping curves: B (resistive), C (mixed/inductive), D (high inrush).
Poles: 1P / 2P / 3P / 4P with common trip.
Terminal capacity: up to 25 mm² Cu (typ.), captive screws; IP20 finger-safe.
Endurance: ≥ 10,000 mechanical operations (typ.); high electrical life for frequent switching (by curve).
Standards: designed according to IEC 60898-1 and IEC 60947-2 (model dependent).
Mounting: DIN rail EN 60715, top/bottom feed, padlockable handle options (by model).
Ambient: −25…+55 °C (typ.), storage −40…+70 °C; altitude ≤ 2000 m (typ.).
Accessories: auxiliary contacts / alarm (by model), phase barriers, label window.

Technical Specifications

매개변수	Typical Value / Options
Standards (design)	IEC 60898-1 (domestic, final circuits); IEC 60947-2 (industrial, by model)
Rated Voltage Ue	230/400 VAC, 50/60 Hz
Rated Current In	6, 10, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125 A (by model)
차단 용량	6 kA or 10 kA at 230/400 VAC (by model)
Tripping Curve	B/C/D
폴	1P / 2P / 3P / 4P
Dielectric Test	2.5 kV, 1 min (typ.)
Impulse Withstand Uimp	4 kV (typ.)
Insulation Category	Pollution degree 2; overvoltage category III
터미널 용량	Up to 25 mm² Cu (typ.), tightening torque 2.5 N·m (≈22 in-lb)
Protection Degree	IP20 (terminals) when installed
마운팅	DIN rail EN 60715, top/bottom feed
Ambient	−25…+55 °C operation (typ.), ≤2000 m altitude
Materials	Thermoset/thermoplastic housing; copper alloy terminals
Options	Aux/Alarm contacts (OF/SD), handle lock, phase barriers (by model)

치수

AC MCB 1P — Outline & mounting

AC MCB 3P/4P — Outline & mounting

애플리케이션

Residential distribution boards, lighting and socket circuits.
Commercial sub-panels, HVAC, small motors and pumps (curve C/D).
Control panels and OEM equipment requiring compact short-circuit protection.
Retrofits and upgrades from legacy breakers to DIN-rail form factor.

쿠앙야를 선택해야 하는 이유

Factory-direct supply with ISO-based quality control and traceability.
Wide selection across poles, ratings and curves to fit standard panels.
Stable lead times and export packaging validated for global shipping.
OEM options on labeling, accessories and packing (by project).

자주 묻는 질문

What is the difference between B, C and D curves?

B trips at 3–5× In (resistive loads), C at 5–10× In (mixed/inductive), D at 10–20× In (high inrush: motors, transformers).

6 kA vs 10 kA — which should I choose?

Match the breaking capacity to the prospective short-circuit current at the installation point; many commercial panels require 10 kA.

Can I use AC MCBs on DC?

No; use DC-rated breakers for direct current systems due to different arc behavior and polarity considerations.

Do you offer auxiliary contacts?

Yes, auxiliary/alarm contacts are available on selected models; check the datasheet for part numbers.

Are these compliant with IEC standards?

They are designed according to IEC 60898-1 and/or IEC 60947-2 depending on model; compliance/marking is model-specific.

견적 받기 See DC MCBs