Miniature Circuit Breaker (McB) LYM2-63-2

Item No.: LYM2-63-2

Miniature Circuit Breaker (McB) LYM2-63-2

Description：

Construction and Feature
• High short-short capacity 10KA.
• Designed to protect circuit carrying big current up to 63A.
• Contact position indication.
Used as main switch in household and similar installation

The LYM2-63-2 is an AC miniature circuit breaker designed for dual-pole circuit protection, providing reliable overload and short-circuit protection in low-voltage AC distribution systems.

🔹 Key Technical Knowledge

Protection type: Thermal-magnetic protection
Pole configuration: 2P (dual-pole isolation)
Installation: 35 mm DIN rail
Compliance: IEC 60898 standard
Manufacturer role: Factory-direct MCB manufacturer with OEM capability

🔹 Why choose LYM2-63-2?

Simultaneous disconnection of phase and neutral improves electrical safety
Stable breaking performance under frequent switching conditions
Compact modular design saves space inside distribution boards

🔹 OEM & Manufacturing Advantage

As an experienced AC MCB manufacturer and factory, we provide bulk supply, OEM branding, and customized technical parameters for global distributors and panel builders.

🔹 Use Cases / Industries

Residential distribution boards
Commercial power panels
Electrical contractors
OEM switchgear assembly
Building electrical infrastructure

Standard

IEC/EN 60898-1

Pole No

1P,1P+N,2P,3P,3P+N,4P

Rated voltage

AC 230V/400V

Rated Current(A)

1A,2A,3A,4A,6A,10A,16A,20A,25A,32A,40A,50A,63A

Tripping curve

B,C,D

Rated short-circuit capacity(lcn)

10000A

Rated frequency

50/60Hz

Rated impulse withstand voltage Uimp

4kV

Connection terminal

Pillar terminal with clamp

Mechanical life

20,000 Cycles

Electrical life

4000 Cycles

Protection degree

IP20

Connection capacity

Flexible conductor 35mm²

Rigid conductor 50mm²

Installation

On symmetrical DIN rail 35mm

Panel mounting

Overload Current Protection Characteristics

Test

Tripping
Type

Test
Current

Initial
State

Tripping timeor Non-tripping Time
Provisior

a

Time-delay

1.13In

Cold

t≤1h(In≤63A)
t≤2h(In>63A)

No Tripping

b

Time-delay

1.45In

After test a

t<1h(In≤63A)
t<2h(In>63A)

Tripping

C

Time-delay

2.55In

Cold

10s<t<60s(In≤63A)
20s<t<120s(In>63A)

Tripping

d

B curve

3In

Cold

t≤0.1s

No Tripping

C curve

5In

Cold

t≤0.1s

No Tripping

D curve

10in

Cold

t≤0.1s

No Tripping

e

B curve

5In

Cold

t≤0.1s

Tripping

C curve

10In

Cold

t≤0.1s

Tripping

D curve

20in

Cold

t≤0.1s

Tripping

The tripping characteristic curves

Overall& Installation Dimensions

FAQs

Q1: What is the difference between LYM2-63-2 and single-pole MCBs?
A: The LYM2-63-2 is a double-pole MCB, allowing simultaneous disconnection of two live conductors for improved circuit isolation.

Q2: When should a double-pole AC MCB be used?
A: Double-pole MCBs are commonly used in single-phase systems where both line and neutral protection is required.

Q3: Is this MCB suitable for residential installations?
A: Yes, it is widely used in residential and small commercial distribution boards for enhanced electrical safety.

Q4: What type of protection mechanism is used?
A: The LYM2-63-2 uses a thermal-magnetic tripping system for accurate and fast protection.

Q5: Does this product support international projects?
A: Yes, it complies with IEC / EN standards and is suitable for global export markets.

Q6: Can branding or specifications be customized?
A: Yes, we provide OEM and ODM services as a professional MCB factory.