Miniature Circuit Breaker(MCB) LYM16-63

Item No.: LYM16-63

Miniature Circuit Breaker(MCB) LYM16-63

Description：

The state-of-art design
Elegant appearance; cover and handle in arc shape make comfortable operation.Contact posiion indicating window.Transparent
cover designed to carry label.
Handle central-staying function for circuit fault indicating
I In case of overioad, to protected circuit, MCB handle trips and stays at central posiion, which enables a quick solution to the faultyline. The handle cannot stay in such position when operatedmanually.
High short-circuit capacity
High short-circuit capacity 10KA for whole range and 15kA capacity for current rating up to 40A thanks to the powerful electricarc extinguishing system.Long electrical endurance up to 6000 cycles thanks to quick making mechanism.
Handle padlock device
MCB handle can be locked either at "ON" position or at"OFF" position to prevent unwanted operation of the product.
Screw terminal lock device
The lock deyice prevents unwanted or casual dismounting of connected terminals

The LYM16-63 AC MCB is designed for precise and stable protection of low-voltage AC circuits in compact distribution systems.

Manufactured in our own AC MCB factory, this series balances electrical performance with cost efficiency, making it suitable for large-scale OEM and wholesale supply.

Target users: electrical distributors and OEM system integrators.

🔹 Use Cases / Industries

Commercial distribution panels
Office buildings and retail spaces
Electrical contractors and installers
OEM switchboard manufacturers
Power distribution equipment suppliers

Technical Data

Pole No.: 1,1P+N,2,3,3P+N,4
Rated voltage: AC 230/400V
Rated current(A):1,2,3,4,6,10,13,16,20,25,32,40,50,63A
Tripping curve: B, C, D
High short-circuit breaking capacity (lcn): 10k
Rated service short-circuit breaking capacity(lcs): 7.5kA
Rated frequency: 50/60Hz
Energy limiting class: 3
Rated impulse withstand voltage: 6.2kV
Electro-mechanical endurance:20000
Contact position indication
Connection terminal:
Screw terminal
Pillar terminal with clamp
Connection capacity: Rigid conductor up to 25mm
Terminal Connection Height: 19mm
Fastening torque: 2.0Nm
Installation
On symmetrical DlN rail 35mm
Panel mounting

Power conumption

Rated Current Range (InA)																			Maxconsumption/pole (W)
In≤10																			3
10<In≤16																			3.5
16<In≤25																			4.5
25<In≤32																			6
32<In≤40																			7.5
40<In≤50																			9
50<In≤63																			13

Overload Current Protection Characteristics

Test procedure

Type

Test Current

Initial State

Tripping or Non-tripping Time Limit

Expected Result

Remark

A

B,C,D

1.13In

cold

t≤1h

no tripping

B

B,C,D

1.45In

after test a

t<1h

tripping

Current in the 5s in th increase of stability

C

B,C,D

2.55In

cold

1s<t<60s(In≤32A)
1s<t<120s(n>32A)

tripping

D

B

3In

cold

t≥0.1s

no tripping

Turn on the auxiliary switch to
close the current

C

5In

D

10In

E

B

5In

cold

t<0.1s

tripping

Turn on the auxiliary switch to
close the current

C

10In

D

20in

Outline and Mounting Dimension

FAQ

1. What distinguishes the LYM16-63 from standard MCB models?
The LYM16-63 is optimized for medium-load AC circuits, offering enhanced thermal-magnetic protection performance for stable long-term operation.

2. What type of protection mechanism does this MCB use?
It uses a thermal-magnetic trip mechanism, providing accurate overload protection (thermal) and fast short-circuit interruption (magnetic).

3. What voltage systems is the LYM16-63 suitable for?
This model is suitable for standard AC low-voltage systems commonly used in residential, commercial, and light industrial applications.

4. Is the housing material safe for high-temperature environments?
Yes. The enclosure is made from flame-retardant, high-strength insulating material, ensuring safety during abnormal electrical conditions.

5. Does the LYM16-63 support frequent switching operations?
Yes. It is designed for repeated ON/OFF operations while maintaining mechanical durability and contact stability.

6. Is factory-direct supply available?
Absolutely. We offer factory-direct wholesale pricing, OEM/ODM services, and customized packaging for international partners.