Siemens 3RH29112HA11 Auxiliary Switch
Engineering verification checklist
- Confirm contact arrangement matches circuit requirements (1NO+2NC per MPN suffix)
- Verify compatibility with target contactor frame size (S00 or S0)
- Confirm mounting configuration matches panel layout (front/side mount per variant)
- Check enclosure package type matches procurement specification (bulk)
- Validate ROHS3 compliance requirement for end application
- Confirm wire entry orientation aligns with existing wiring routing
Comparison: 3RH29112HA11 versus SIRIUS 3RH2 alternates
All alternates listed belong to the SIRIUS 3RH2 series and are mechanically compatible with the same contactor families. Readers must qualify each alternative independently against their specific control circuit requirements.
| Spec | 3RH29112HA11 | 3RH29112HA12 | 3RH29111HA11 |
|---|---|---|---|
| Accessory Type | Auxiliary Switch | Auxiliary Switch | Auxiliary Switch |
| Series | SIRIUS 3RH2 | SIRIUS 3RH2 | SIRIUS 3RH2 |
| Contact Configuration | 1NO+2NC | 1NO+2NC | 1NO+1NC |
| For Use With | 3RH, 3RT Contactors | 3RH, 3RT Contactors | 3RH, 3RT Contactors |
| Base Product Number | 3RH29112 | 3RH29112 | 3RH29111 |
| Similarity | 1.000 | 0.920 | 0.890 |
3RH29112HA12 shares the same base product number and contact arrangement; the trailing variant difference indicates minor mechanical or marking variation only.
3RH29111HA11 uses a different base product number (3RH29111 vs 3RH29112), which shifts the available contact configurations to 1NO+1NC rather than 1NO+2NC; readers requiring the 1NO+2NC count must use a 3RH29112 variant.