Siemens 5SJ4211-7HG42 Miniature Circuit Breaker
Product Family and Type
The 5SJ4 prefix identifies this unit as part of Siemens' 5SJ4 DIN-rail MCB series, a 2-pole device rated at 5 A with C-curve trip characteristics intended for 480Y/277 V AC systems.
| Specification | Value |
|---|---|
| Brand | Siemens |
| MPN | 5SJ4211-7HG42 |
| Series | 5SJ4 |
| Current Rating | 5 A |
| Voltage | 480Y/277 V AC |
| Poles | 2 |
| Trip Curve | C |
| Mounting | DIN Rail |
| Actuator | Lever |
| Package | Bulk |
| RoHS | Non-compliant |
| Status | Active |
Engineering Verification Checklist
- Confirm system voltage matches 480Y/277 V AC before installation
- Verify load current does not exceed 5 A continuous
- Check that C-curve characteristic suits protected load type (no high inrush beyond 5–10×)
- Confirm DIN rail enclosure mounting and clearances
- Verify applicable approvals for the installation jurisdiction (CCC, CE, CSA, UL, VDE)
- Confirm coordination with upstream overcurrent protection
- Verify selectivity with downstream protective devices if required
- Test mechanical trip function and confirm lever operation
- Document installed position and branch circuit assignment