Siemens SIRIUS front-mounted auxiliary contact block
3RH2911-1HA31
SIRIUS front-mounted auxiliary contact block, 3 NO + 1 NC, screw terminals. For compatible 3RT2 contactors.
- Application
- Contactors
- Accessory type
- Front auxiliary block
- Option
- 3 NO + 1 NC

Product specification
3RH2911-1HA31
SIRIUS front-mounted auxiliary contact block, 3 NO + 1 NC, screw terminals. For compatible 3RT2 contactors.
Dimensions & specifications
Accessories are matched to individual parts. A shared manufacturer or frame size alone does not establish compatibility.
Accessories & related parts
3RH2911-1HA31 — specifications & documents
SIRIUS front-mounted auxiliary contact block, 3 NO + 1 NC, screw terminals. For compatible 3RT2 contactors.
| Accessory type | Front auxiliary block |
|---|---|
| Contact arrangement | 3 NO + 1 NC |
| Mounting | Front |
| Connection | Screw terminals |
| Frame sizes | S00, S0, S2, S3 |
Fits these parts
- 3RT2015-1BB41 SIRIUS S00 power contactor, 3 kW at 400 V, 7 A AC-3 / AC-3e, 3 pole. 24 V DC coil, 1 NO, screw terminals.
- 3RT2015-1AB01 SIRIUS S00 power contactor, 3 kW at 400 V, 7 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2015-1AF01 SIRIUS S00 power contactor, 3 kW at 400 V, 7 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2015-1AP01 SIRIUS S00 power contactor, 3 kW at 400 V, 7 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2016-1BB41 SIRIUS S00 power contactor, 4 kW at 400 V, 9 A AC-3 / AC-3e, 3 pole. 24 V DC coil, 1 NO, screw terminals.
- 3RT2016-1AB01 SIRIUS S00 power contactor, 4 kW at 400 V, 9 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2016-1AF01 SIRIUS S00 power contactor, 4 kW at 400 V, 9 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2016-1AP01 SIRIUS S00 power contactor, 4 kW at 400 V, 9 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2017-1BB41 SIRIUS S00 power contactor, 5.5 kW at 400 V, 12 A AC-3 / AC-3e, 3 pole. 24 V DC coil, 1 NO, screw terminals.
- 3RT2017-1AB01 SIRIUS S00 power contactor, 5.5 kW at 400 V, 12 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2017-1AF01 SIRIUS S00 power contactor, 5.5 kW at 400 V, 12 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2017-1AP01 SIRIUS S00 power contactor, 5.5 kW at 400 V, 12 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2018-1BB41 SIRIUS S00 power contactor, 7.5 kW at 400 V, 16 A AC-3 / AC-3e, 3 pole. 24 V DC coil, 1 NO, screw terminals.
- 3RT2018-1AB01 SIRIUS S00 power contactor, 7.5 kW at 400 V, 16 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2018-1AF01 SIRIUS S00 power contactor, 7.5 kW at 400 V, 16 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2018-1AP01 SIRIUS S00 power contactor, 7.5 kW at 400 V, 16 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO, screw terminals.
- 3RT2026-1BB40 SIRIUS S0 power contactor, 11 kW at 400 V, 25 A AC-3 / AC-3e, 3 pole. 24 V DC coil, 1 NO + 1 NC, screw terminals.
- 3RT2026-1AC20 SIRIUS S0 power contactor, 11 kW at 400 V, 25 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2026-1AG20 SIRIUS S0 power contactor, 11 kW at 400 V, 25 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2026-1AL20 SIRIUS S0 power contactor, 11 kW at 400 V, 25 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2027-1BB40 SIRIUS S0 power contactor, 15 kW at 400 V, 32 A AC-3 / AC-3e, 3 pole. 24 V DC coil, 1 NO + 1 NC, screw terminals.
- 3RT2027-1AC20 SIRIUS S0 power contactor, 15 kW at 400 V, 32 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2027-1AG20 SIRIUS S0 power contactor, 15 kW at 400 V, 32 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2027-1AL20 SIRIUS S0 power contactor, 15 kW at 400 V, 32 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2028-1BB40 SIRIUS S0 power contactor, 18.5 kW at 400 V, 38 A AC-3 / AC-3e, 3 pole. 24 V DC coil, 1 NO + 1 NC, screw terminals.
- 3RT2028-1AC20 SIRIUS S0 power contactor, 18.5 kW at 400 V, 38 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2028-1AG20 SIRIUS S0 power contactor, 18.5 kW at 400 V, 38 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2028-1AL20 SIRIUS S0 power contactor, 18.5 kW at 400 V, 38 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2036-1NB30 SIRIUS S2 power contactor, 22 kW at 400 V, 51 A AC-3 / AC-3e, 3 pole. 20–33 V AC/DC (includes 24 V DC) coil, 1 NO + 1 NC, screw terminals.
- 3RT2036-1AC20 SIRIUS S2 power contactor, 22 kW at 400 V, 51 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2036-1AG20 SIRIUS S2 power contactor, 22 kW at 400 V, 51 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2036-1AL20 SIRIUS S2 power contactor, 22 kW at 400 V, 51 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2037-1NB30 SIRIUS S2 power contactor, 30 kW at 400 V, 65 A AC-3 / AC-3e, 3 pole. 20–33 V AC/DC (includes 24 V DC) coil, 1 NO + 1 NC, screw terminals.
- 3RT2037-1AC20 SIRIUS S2 power contactor, 30 kW at 400 V, 65 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2037-1AG20 SIRIUS S2 power contactor, 30 kW at 400 V, 65 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2037-1AL20 SIRIUS S2 power contactor, 30 kW at 400 V, 65 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2038-1NB30 SIRIUS S2 power contactor, 37 kW at 400 V, 80 A AC-3 / AC-3e, 3 pole. 20–33 V AC/DC (includes 24 V DC) coil, 1 NO + 1 NC, screw terminals.
- 3RT2038-1AC20 SIRIUS S2 power contactor, 37 kW at 400 V, 80 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2038-1AG20 SIRIUS S2 power contactor, 37 kW at 400 V, 80 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2038-1AL20 SIRIUS S2 power contactor, 37 kW at 400 V, 80 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2046-1NB30 SIRIUS S3 power contactor, 45 kW at 400 V, 95 A AC-3 / AC-3e, 3 pole. 20–33 V AC/DC (includes 24 V DC) coil, 1 NO + 1 NC, screw terminals.
- 3RT2046-1AC20 SIRIUS S3 power contactor, 45 kW at 400 V, 95 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2046-1AG20 SIRIUS S3 power contactor, 45 kW at 400 V, 95 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2046-1AL20 SIRIUS S3 power contactor, 45 kW at 400 V, 95 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2047-1NB30 SIRIUS S3 power contactor, 55 kW at 400 V, 110 A AC-3 / AC-3e, 3 pole. 20–33 V AC/DC (includes 24 V DC) coil, 1 NO + 1 NC, screw terminals.
- 3RT2047-1AC20 SIRIUS S3 power contactor, 55 kW at 400 V, 110 A AC-3 / AC-3e, 3 pole. 24 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2047-1AG20 SIRIUS S3 power contactor, 55 kW at 400 V, 110 A AC-3 / AC-3e, 3 pole. 110 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
- 3RT2047-1AL20 SIRIUS S3 power contactor, 55 kW at 400 V, 110 A AC-3 / AC-3e, 3 pole. 230 V AC, 50/60 Hz coil, 1 NO + 1 NC, screw terminals.
