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
Minimum Operating Temperature
Maximum Operating Temperature
Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 6A 10K D-TRIP
Datasheet
13In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 6 A 277 VAC, 480 VAC 60 VDC 2 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 Breakers Miniature 1 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 16A SAME PH 14K B-TRIP
Datasheet
2In Stock
3Expected 9/28/2026
Min.: 1
Mult.: 1
Circuit Breakers Miniature 16 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 8A 10K C-TRIP
Datasheet
1In Stock
Min.: 1
Mult.: 1
Circuit Breakers 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 45A 10K D-TRIP
Datasheet
1In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 45 A 240 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 6A 14K C-TRIP
Datasheet
23In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 6 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 5A SAME PH 14K D-TRIP
Datasheet
16In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 5 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 20A 10K C-TRIP
Datasheet
4In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 20 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 20A 10K D-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 20 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 3A 10K D-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers 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 2A 14K C-TRIP
Datasheet
17In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 2 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 2A 10K D-TRIP
Datasheet
4In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 2 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 1P 240V 10A SAME PH 14K C-TRIP
Datasheet
38In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 10 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 2A 10K C-TRIP
Datasheet
20In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 2 A 277 VAC, 480 VAC 60 VDC 2 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 240V 8A 14K C-TRIP
Datasheet
65In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 8 A 240 VAC 60 VDC 2 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 240V 10A 14K C-TRIP
Datasheet
39In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 10 A 240 VAC 60 VDC 2 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 10A 10K C-TRIP
Datasheet
18In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 10 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
10In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 3 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 6A 10K C-TRIP
Datasheet
10In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 6 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
11In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers 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 Breakers 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 Breakers 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
15In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers 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
16In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers 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
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 2 A 277 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated