6kA SFM3-125 DC 125A best quantity D16 types of miniature circuit breaker

6kA SFM3-125 DC 125A best quantity D16 types of miniature circuit breaker
6kA SFM3-125 DC 125A best quantity D16 types of miniature circuit breaker
6kA SFM3-125 DC 125A best quantity D16 types of miniature circuit breaker
6kA SFM3-125 DC 125A best quantity D16 types of miniature circuit breaker
6kA SFM3-125 DC 125A best quantity D16 types of miniature circuit breaker

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Categories Economic 4.5KA, 6kA Regular Series Circuit Breaker
Model SFM3-125 DC 125A
Rated current(A) 1,2,3,4,6,10,16,20,25,32,40,50,63
Frame size Rated current(A) 63A, 125A
Number of poles 1P, 2P
Breaking current 10000
Time costant 10
Application 

 

● The maximum ambient air temperature does not exceed +40C, minimum is not less than -5C,and the average value does not exceed +35C.

● The altitude of the installation site does not exceed 2000m.

● The relative humidity of the atmosphere does not exceed 50% at the maximum ambient temperature of +40C. Relative humidily at high temperatures can be relatively high. The monthly average maximum relative humidity of the wettest month is 90%, and the monthly average of the month The minimum temperature is +25C and takes into account condensation that occurs on

● Pollution levelis 2.

● Installation categories are I, II.

● Use TH35- 7.5 steel mounting rails for installation.

● The inclination of the mounting surface and the vertical surface does not exceed 5°.

● Screw the wire tight.

Construction and Feature

SFM3-DC DC circuit breaker is composed of outer casing, operating mechanism, thermal release,electromagnetic tripping contact system, arc extinguishing system, etc. It has overload and short circuit protection functions, unique design structure and powerful permanent magnet arc extinguishing system. The product has a short circuit capability of 10kA and a mechanical life of more than 20,000 times. The appearance of the product is beautiful. The mounting rail is a TH35-7.5 standard steel mounting rail, and has the following features: the handle is designed on the front side of the front end, and the operation is safe and strong. Feel comfortable, be sure to pay attention to the "+, -" polarity when wiring, the power supply goes in and out, in line with the characteristics of the power supply line, easy to install, saves the wire.

Technical Data
Table 1
Frame size rated current Pole Rated voltage Rated current  Rated ultimate short circuit capability Instantaneous release current
Breaking current  Time constant
63 1 DC250V 1,2,3,4,6,10,16,20,25,32,40,50,63 10000 10 8ln-12ln
2 DC500V
125 1 DC250V 80,100,125 10000 10 8ln-12ln
2 DC500V

 

Standard time-current

Table 2
Test DC test current Initial state Time limit Expected result Remark
a 1.05ln Cold state

t≥1h(ln≤63A)

t≥2h(ln>63A)

No tripping  
b 1.3ln Right after test number a

t<2h(ln>63A)

t<1h(ln≤63A)

tripping  
c 8ln Cold state t≥0.2s No tripping  
12ln t<0.2s tripping  

 

Wiring diagram

Wiring diagram

Dimensions

Dimensions

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