Miniature Circuit Breaker(MCB) LYM2-125

Description：

Construction and Feature
• High short-short capacity 10KA.
• Designed to protect circuit carrying big current up to 125A.
• Contact position indication.
• Used as main switch in household and similar installation.

The LYM2-125 AC MCB is designed for higher-current AC circuits, supporting rated currents up to 125A for sub-main and main distribution applications.

Produced by an experienced miniature circuit breaker factory, this model combines strong mechanical endurance with reliable thermal-magnetic protection.

Typical application: main distribution boards and industrial control panels.

🔹 Use Cases / Industries

Main distribution boards
Industrial auxiliary power systems
Commercial power infrastructure
Electrical panel builders
Large-scale equipment manufacturers

Standard	IEC/EN 60947-2
Pole No	1P,1P+N,2P,3P,3P+N,4P
Rated voltage	AC 230V/400V
Rated Current(A)	20A,25A,32A,40A,50A,63A,80A,100A,125A
Tripping curve	C,D
Rated short-circuit capacity(lcn)	10000A
Rated service short-circuit capacity(Ics)	7500A
Rated frequency	50/60Hz
Rated impulse withstand voltage Uimp	6kV
Connection terminal	Pillar terminal with clamp
Electro-mechanical endurance	Ins100=10000:n125=8000
Terminali Connection Height	20mm
Connection capacity Installation	Flexible conductor 35mm²
	Rigid conductor 50mm²
	On symmetrical DIN rail 35mm
	Panel mounting

Overload Current Protection Characteristics

Test	Tripping Type	Test Current	Initial State	Tripping timeor Non-tripping Time Provision
a	Time-delay	1.05In	Cold	t≤1h(In≤63A) t≤2h(In>63A)	No Tripping
b	Time-delay	1.30In	After test a	t<1h(In≤63A) t<2h(In>63A)	Tripping
C	Time-delay	2In	Cold	10s<t<60s(In≤63A) 20s<t<120s(In>63A)	Tripping
d	Instantaneous	8In	Cold	t≤0.2s	No Tripping
e	Instantaneous	12In	Cold	t<0.2s	Tripping

The tripping characteristic curves

Overall& Installation Dimensions

FAQ

1. What applications is the LYM2-125 AC MCB best suited for?
The LYM2-125 is designed for higher current AC circuits, making it ideal for main incoming protection and heavy-load branch circuits.

2. What makes the LYM2-125 suitable for higher current ratings?
Its internal contact system and arc-extinguishing structure are engineered to handle increased current levels while maintaining reliable fault interruption.

3. How does this MCB improve electrical system safety?
By quickly disconnecting circuits during overload or short-circuit events, it reduces the risk of cable overheating, equipment damage, and fire hazards.

4. Is this breaker compatible with standard distribution enclosures?
Yes. It supports standard DIN-rail installation and fits common modular electrical enclosures used worldwide.

5. Does this model meet international compliance requirements?
The LYM2-125 is produced under strict quality control and complies with IEC standards applicable to high-current miniature circuit breakers.

6. Can this MCB be customized for branding or large projects?
Yes. As a dedicated MCB factory, we provide OEM labeling, bulk supply, and project-based customization.