Siemens 5SJ4 Miniature Circuit Breaker
The 5SJ4110-7HG42 is a single-pole DIN-rail-mounted MCB from Siemens' 5SJ4 series. This series uses the 5SJ4 prefix across current ratings from 5 A to 63 A in this footprint.
Key Ratings and Certifications
- Current rating: 10 A
- Voltage: 277 V AC (single-pole)
- Breaking capacity: 10 kA
- Trip characteristic: C-curve (5–10× In)
- Agency approvals: CCC, CE, CSA, EAC, UL489, VDE
Physical and Installation
- Mounting: 35 mm DIN rail
- Actuator: lever-type
- No integral illumination
- Encapsulation/package: bulk
- RoHS: non-compliant
Comparison vs Close Alternates
| Spec | 5SJ4110-7HG42 | 5SJ4110-7HG40 | 5SJ4110-7HG41 |
|---|---|---|---|
| Voltage | 277 V | 240 V | 240 V |
| Current | 10 A | 10 A | 10 A |
| Poles | 1 | 1 | 1 |
| Breaking | 10 kA | 14 kA | 14 kA |
| Trip | C-curve | C-curve | C-curve |
| Similarity | — | 1.0 | 1.0 |
Readers must independently verify that any alternate meets the application voltage and breaking capacity requirements. Both alternates share the same 10 A, 1-pole, C-curve, DIN-rail form factor; the 5SJ4110-7HG40 carries UL (not UL489) and the 5SJ4110-7HG41 carries UL489, so the CE/CCC/EAC/VDE stack is identical.