Miniature Circuit Breaker (MCB) LYM2-63-1

Item No.: LYM2-63-1

Miniature Circuit Breaker (MCB) LYM2-63-1

Description：

Construction and Feature
• High short-short capacity 6KA
• Designed to protect circuit carrying big current up to 63A.
• Contact position indication.
• Used as main switch in household and similar installation.

The LYM2-63-1 is a single-pole AC miniature circuit breaker designed for individual branch circuit protection against overloads and short-circuit faults.

🔹 Core Functional Knowledge

Pole: 1P (single-phase protection)
Rated current range: Up to 63A
Trip mechanism: Thermal + magnetic
Mounting: Standard DIN rail installation

🔹 What problem does it solve?

Prevents cable overheating caused by overload
Quickly interrupts short-circuit currents
Protects downstream electrical devices

🔹 Standards & Certifications

Manufactured according to IEC low-voltage protection standards and suitable for CE-certified electrical systems used in international markets.

🔹 Factory & Branding Statement

We are a professional MCB manufacturer, supplier, and OEM factory, supporting wholesale distribution and private-label cooperation.

🔹 Use Cases / Industries

Lighting circuits
Socket outlet protection
Residential electrical boxes
Small commercial installations
Electrical product wholesalers

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)

6000A

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 LYM2-63-1 AC MCB designed for?
A: The LYM2-63-1 is a single-pole AC miniature circuit breaker designed to protect individual phase circuits in low-voltage distribution systems.

Q2: What current range does this model support?
A: This series supports rated currents up to 63A, making it suitable for most standard residential and light commercial applications.

Q3: How does this MCB protect electrical circuits?
A: It provides thermal protection against overloads and magnetic protection against short circuits, ensuring reliable circuit disconnection.

Q4: Is this product suitable for DIN rail mounting?
A: Yes, it features a standard modular design for quick DIN rail installation in distribution boards.

Q5: What standards does the LYM2-63-1 comply with?
A: It is manufactured in accordance with IEC / EN 60898-1 standards.

Q6: Can this model be supplied for OEM projects?
A: Yes, as an experienced AC MCB manufacturer, we offer OEM/ODM customization for labeling and packaging.