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Miniature Circuit Breaker

The LY15 series miniature circuit breaker is a low-voltage protection device compliant with IEC60898 standards, designed for AC 230V/400V systems. It provides dual protection against overload and short circuits, with a rated current range of 1A-32A and a breaking capacity of 6kA. Suitable for residential, commercial, and industrial applications, it supports 1P, 2P, 3P, 4P, and neutral-included configurations (1P+N, 3P+N). Multiple tripping curves (B/C/D) cater to diverse load requirements. Featuring vacuum arc-extinguishing technology, it offers a mechanical lifespan of 4,000 operations and supports 35mm DIN rail installation, making it ideal for distribution boxes and control cabinets.

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High Breaking Capacity MCB DIN Rail Mount Circuit Breaker Tripping Curve MCB IEC60898 Certified Miniature Circuit Breaker Industrial Grade MCB for Motors

Product Advantages

Technical Parameters

Applications

FAQ

1. High Short-Circuit Breaking Capacity

- 6kA breaking capacity (IEC60898) with Class 3 energy limitation, minimizing equipment damage.

2. Flexible Configuration & Multi-Functionality

- 6 pole configurations (1P/3P+N, etc.) and B/C/D tripping curves for lighting (B), motors (D), and mixed loads (C).

- Optional F2 auxiliary contacts, S2 shunt releases, and U2+O2 over/under-voltage modules for remote control.

3. Long Lifespan & Easy Installation

- 4,000 mechanical operations, silver-plated contacts (≤5mΩ resistance), and tool-free DIN rail mounting (<10 seconds).

4. Wide Environmental Adaptability

- Operates at -5℃~+40℃, ≤90% humidity (non-condensing), IP20 protection, and pollution degree II compliance.

Parameter

Value

Rated Voltage (Ue)

AC 230V/400V

Rated Current (In)

1A-32A (10 steps)

Breaking Capacity (Icn)

6kA

Tripping Curves

Mechanical Life

4000 operations

Terminals

Cage clamp (25mm² wire)

Certifications

ISO9001-2000

- Residential: Protects lighting/socket circuits (e.g., AC, refrigerators) against overload fires.

- Commercial: Safeguards office/store branch circuits (C-curve for mixed loads).

- Industrial: Secures small motors (≤3kW) with D-curve tolerance for 6-10×In startup surges.

- Smart Homes: Integrates U2+O2 modules for voltage anomaly protection.

Q1: How to choose B/C/D tripping curves?

A: B-curve (3-5×In) for lighting, C-curve (5-10×In) for sockets, D-curve (10-20×In) for motors.

Q2: Is horizontal mounting allowed?

A: Vertical installation only (≤5° tilt) to ensure arc quenching and tripping accuracy.

Q3: When to replace an MCB?

A: Replace if manual operation jams, contacts carbonize, or tripping time deviates >20%.

Q4: Compatible with DC systems?

A: AC-only. Use DC-rated models (3kA@250V breaking capacity).

Q5: High-altitude usage?

A: Derate by 5% per 1,000m above 2,000m or select "H"-suffix highland variants.

Hangzhou Liyi Electrical Equipment Co., Ltd. is located in Hangzhou Future Science and Technology City. It is a high-tech enterprise dedicated to the research, production and sales of intelligent power system products.

CONTACT US

+86-13386526575
+86-19157898946
+86-17794526635
info@liyiep.com
Marketing Center Address: Room 509, Building 9, Bafang City, Xixi, Hangzhou City, Zhejiang Province,China
Production Factory Address: 3F, Building 1, No.16 Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou City, Zhejiang Province, China.

- info@liyiep.com

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