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 3P 480/277 4A 10K D-TRIP
Datasheet
1In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 4 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 240V 6A 14K D-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 6 A 240 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 6A 10K D-TRIP
Datasheet
1In 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 3P 480/277 10A 10K C-TRIP
Datasheet
1In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 10 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 5A 10K C-TRIP
Datasheet
2In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 5 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 5A 10K D-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 5 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 16A 10K C-TRIP
Datasheet
2In Stock
3Expected 10/22/2026
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 16 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 240V 15A 14K C-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 15 A 240 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 15A 10K C-TRIP
Datasheet
2In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 15 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 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 25A 10K C-TRIP
Datasheet
1In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 25 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 240V 30A 14K C-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 30 A 240 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 30A 10K C-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 30 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 240V 30A 10K D-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 30 A 240 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 30A 10K D-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 30 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 240V 40A 14K C-TRIP
Datasheet
3In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 40 A 240 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 40A 10K C-TRIP
Datasheet
5In Stock
Min.: 1
Mult.: 1
Circuit Breakers Miniature 40 A 277 VAC, 480 VAC 60 VDC 3 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 2P 480/277 2A 10K C-TRIP
Datasheet
2In Stock
18On Order
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 480/277 10A 10K C-TRIP
Datasheet
18On Order
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 2P 240V 25A 14K C-TRIP
Datasheet
26Expected 9/28/2026
Min.: 1
Mult.: 1
Circuit Breakers Miniature 25 A 240 VAC 60 VDC 2 Pole Lever - 25 C + 55 C Non-Illuminated
Siemens Circuit Breakers MCB 5SJ4 3P 480/277 6A 10K C-TRIP
Datasheet
10On Order
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 10A SAME PH 14K B-TRIP
Datasheet
5Expected 9/17/2026
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 1P 240V 10A 14K C-TRIP
Datasheet
13Expected 8/25/2026
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 1P 240V 20A 14K C-TRIP
Datasheet
20Expected 9/23/2026
Min.: 1
Mult.: 1
5SJ4 Circuit Breakers Miniature 20 A 240 VAC 60 VDC 1 Pole Lever - 25 C + 55 C Non-Illuminated