5SJ4 Miniature Circuit Breakers

Siemens 5SJ4 Miniature Circuit Breakers come in 1-, 2- or 3-pole versions with 0.3A to 63A rated current. These 70mm mounting depth devices are smaller than traditional molded-case circuit breakers and feature identical wire screw connections on the line and load sides. Siemens 5SJ4 provides DIN rail mounting, an ON and OFF/Trip visible indicator, and EN50274 touch protection.

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Qty. RoHS ECAD Model Series
Product
Type
Current Rating
Voltage Rating AC
Voltage Rating DC
Number of Poles
Actuator Type
Minimum Operating Temperature
Maximum Operating Temperature
Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 8A 10K C-TRIP
Datasheet
2In Stock
Min.: 1
Mult.: 1
Circuit Breaker Miniature 8 A 277 VAC, 480 VAC 60 VDC 2 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 240V 25A 10K D-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
Circuit Breaker Miniature 25 A 240 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 13A 10K D-TRIP
Datasheet
1In Stock
Min.: 1
Mult.: 1
Circuit Breaker Miniature 13 A 277 VAC, 480 VAC 60 VDC 2 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 13A 10K C-TRIP
Datasheet
2In Stock
Min.: 1
Mult.: 1
Circuit Breaker Miniature 13 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 1A 14K D-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
Circuit Breaker Miniature 1 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 10A SAME PH 14K C-TRIP
Datasheet
46In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 10 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 6A 10K D-TRIP
Datasheet
13In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 6 A 277 VAC, 480 VAC 60 VDC 2 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 3A 10K C-TRIP
Datasheet
12In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 3 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 1A SAME PH 14K C-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 1 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 1A 14K C-TRIP
Datasheet
6In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 1 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 277V 1A 10K D-TRIP
Datasheet
1In Stock
Min.: 1
Mult.: 1
Circuit Breaker Miniature 1 A 277 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 2A SAME PH 14K C-TRIP
Datasheet
4In Stock
7Expected 13/03/2026
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 2 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 277V 2A 10K C-TRIP
Datasheet
22In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 2 A 277 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 277V 2A 10K D-TRIP
Datasheet
6In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 2 A 277 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 3A SAME PH 14K C-TRIP
Datasheet
10In Stock
10Expected 27/02/2026
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 3 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 3A 14K C-TRIP
Datasheet
6In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 3 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 277V 3A 10K C-TRIP
Datasheet
6In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 3 A 277 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers KB USACH 200-T4 Cabinet
Datasheet
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 4 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 4A 14K C-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 4 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 277V 4A 10K C-TRIP
Datasheet
8In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 4 A 277 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 4A SAME PH 14K D-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 4 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 277V 4A 10K D-TRIP
Datasheet
7In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 4 A 277 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 0.5A SAME PH 14K C-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 500 mA 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 6A SAME PH 14K C-TRIP
Datasheet
4In Stock
3Expected 06/03/2026
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 6 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 6A 14K C-TRIP
Datasheet
24In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breaker Miniature 6 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated