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Miniature Circuit Breaker
Miniature Circuit Breaker (AC / DC)
  • LDB9-63 Series
Miniature Circuit Breaker (AC / DC)
Product Overview
The LDB9-63 Miniature Circuit Breaker (MCB) is designed for use in lighting distribution systems (type C) or motor distribution systems (type D). It is primarily used for protecting against overload and short circuits in AC 50Hz with a rated voltage of up to 230V or 400V and a rated current of 1A to 63A. It can also disconnect electrical devices and lighting lines infrequently under normal circumstances.
Standards compliant : GB10963.1, IEC 60898-1.

Ambient temperature: -5℃~+40℃; average value within 24h does not exceed 35℃.

Installation location: altitude does not exceed 2000m.

LD

B

9

-

63

DC


LEIDUN

Miniature Circuit Breaker

Design No.


Ampere Frame Rating

(A)

Rated Current

(A)

1P、2P、3P、4P

Director Current

 



AC

DC

Rated Voltage(V)

1P:AC230V、400V;2P、3P、4P:400V

1P:DC250V;2P:DC500V;3P:DC750V;4P:DC1000V

Rated insulation voltage(V) Ui

AC500V

DC1000V

Rated impulse withstand voltage(V)Uimp

AC4000V

DC4000V

Rated Current(A)

1~63A

1~63A

Ultimate short circuit breaking capacity(kA)

6kA

6kA

Operating short circuit breaking capacity(kA)

6kA

6kA

No. of poles

1P、2P、3P、4P

1P、2P、3P、4P

Instantaneous trip type

C:5In~10In;D:10In~16In

B:4In±20%;C:8In±20%;D:12In±20%

Mechanical endurance (Cycles)

20000

20000

Electrical endurance (Cycles)

10000

10000

Wiring Capacity

≤25mm2

≤25mm2

Tightening torque(N·m)

3.0

3.0

Protection level

IP20

IP20

Standards compliant

GB/T10963.1、IEC60898-1

IEC60947-2

 



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