Main Features

Manufacturer: Siemens – Sirius Classic series
Model/MPN: 3RH1911‑2FA22
Device Type: Auxiliary snap-on switch block for motor starters and contactors (Size S00)
Contact Configuration: 4 poles – 2 Normally Open (NO) + 2 Normally Closed (NC)
Current/Voltage Ratings: 10 A resistive at up to 690 VAC per contact
Connection Type: Spring‑type or cage‑clamp terminals; DIN EN 50005 front‑mount design
Mechanical / Electrical Endurance:
- Mechanical lifetime: ~10 million cycles
- Electrical endurance: ~200,000 cycles (AC‑15/230 V)
Environmental & Protection:
- Front-side IP20 protection
- Operating –25 °C to +60 °C; storage –55 °C to +80 °C
- Insulation withstand voltage: 690 V; impulse resistance: 6 kV
Mounting & Form Factor:
- Snap attaches to front of S00-size contactors (e.g. 3RT1015–RT1617 range)
- Lightweight (~60 g), compact block
Lifecycle Note: Discontinued by Siemens; direct replacement available – 3RH2911‑2FA22 Sirius S0 series

Siemens – 3RH1911‑2FA22 – Sirius S00 Snap‑on Auxiliary Switch Block, 2 NO + 2 NC