Siemens SIRIUS 3RT2 size S0 3-pole power contactors, dc coil versions. For switching motors in AC-3/AC-3e: 9–38 A, up to 18.5 kW (400 V).
Technical data
| Series | 3RT2023, 3RT2024, 3RT2025, 3RT2026, 3RT2027, 3RT2028 |
|---|---|
| Size | S0 |
| Poles | 3 |
| Coil | DC coil |
| AC-3 / AC-3e rated current (400 V) | 9–38 A |
| Motor rating (400 V, AC-3) | up to 18.5 kW |
| Mounting | Screw or snap-on DIN rail mounting |
| Terminals | Screw or spring-loaded (by article number) |
| Standard | IEC 60947-4-1 |
Article numbers
| Ie AC-3 400 V (A) | Motor rating 400 V (kW) | Ie AC-1 (A) | Auxiliary contacts | Coil voltage | Version | Screw | Spring-loaded |
|---|---|---|---|---|---|---|---|
| 9 | 4 | 40 | 1 NO + 1 NC | 24 V DC | Standard | 3RT2023-1BB40 | 3RT2023-2BB40 |
| 12 | 5.5 | 40 | 1 NO + 1 NC | 24 V DC | Standard | 3RT2024-1BB40 | 3RT2024-2BB40 |
| 12 | 5.5 | 40 | 1 NO + 1 NC | 220 V DC | Standard | 3RT2024-1BM40 | 3RT2024-2BM40 |
| 17 | 7.5 | 40 | 1 NO + 1 NC | 24 V DC | Standard | 3RT2025-1BB40 | 3RT2025-2BB40 |
| 17 | 7.5 | 40 | 1 NO + 1 NC | 220 V DC | Standard | 3RT2025-1BM40 | 3RT2025-2BM40 |
| 25 | 11 | 40 | 1 NO + 1 NC | 24 V DC | Standard | 3RT2026-1BB40 | 3RT2026-2BB40 |
| 25 | 11 | 40 | 1 NO + 1 NC | 220 V DC | Standard | 3RT2026-1BM40 | 3RT2026-2BM40 |
| 32 | 15 | 50 | 1 NO + 1 NC | 24 V DC | Standard | 3RT2027-1BB40 | 3RT2027-2BB40 |
| 32 | 15 | 50 | 1 NO + 1 NC | 220 V DC | Standard | 3RT2027-1BM40 | 3RT2027-2BM40 |
| 38 | 18.5 | 50 | 1 NO + 1 NC | 24 V DC | Standard | 3RT2028-1BB40 | 3RT2028-2BB40 |
| 38 | 18.5 | 50 | 1 NO + 1 NC | 220 V DC | Standard | 3RT2028-1BM40 | 3RT2028-2BM40 |
| 9 | 4 | 40 | 1 NO + 1 NC | 24 V DC | Varistor plugged on front | 3RT2023-1DB40 | 3RT2023-2DB40 |
| 12 | 5.5 | 40 | 1 NO + 1 NC | 24 V DC | Varistor plugged on front | 3RT2024-1DB40 | 3RT2024-2DB40 |
| 17 | 7.5 | 40 | 1 NO + 1 NC | 24 V DC | Varistor plugged on front | 3RT2025-1DB40 | 3RT2025-2DB40 |
| 25 | 11 | 40 | 1 NO + 1 NC | 24 V DC | Varistor plugged on front | 3RT2026-1DB40 | 3RT2026-2DB40 |
| 32 | 15 | 50 | 1 NO + 1 NC | 24 V DC | Varistor plugged on front | 3RT2027-1DB40 | 3RT2027-2DB40 |
| 38 | 18.5 | 50 | 1 NO + 1 NC | 24 V DC | Varistor plugged on front | 3RT2028-1DB40 | 3RT2028-2DB40 |
| 9 | 4 | 40 | 1 NO + 1 NC | 24 V DC | Diode assembly plugged on front | 3RT2023-1FB40 | 3RT2023-2FB40 |
| 12 | 5.5 | 40 | 1 NO + 1 NC | 24 V DC | Diode assembly plugged on front | 3RT2024-1FB40 | 3RT2024-2FB40 |
| 17 | 7.5 | 40 | 1 NO + 1 NC | 24 V DC | Diode assembly plugged on front | 3RT2025-1FB40 | 3RT2025-2FB40 |
| 25 | 11 | 40 | 1 NO + 1 NC | 24 V DC | Diode assembly plugged on front | 3RT2026-1FB40 | 3RT2026-2FB40 |
| 32 | 15 | 50 | 1 NO + 1 NC | 24 V DC | Diode assembly plugged on front | 3RT2027-1FB40 | 3RT2027-2FB40 |
| 38 | 18.5 | 50 | 1 NO + 1 NC | 24 V DC | Diode assembly plugged on front | 3RT2028-1FB40 | 3RT2028-2FB40 |
| 9 | 4 | 40 | 2 NO + 2 NC | 24 V DC | Removable auxiliary switch | 3RT2023-1BB44 | 3RT2023-2BB44 |
| 12 | 5.5 | 40 | 2 NO + 2 NC | 24 V DC | Removable auxiliary switch | 3RT2024-1BB44 | 3RT2024-2BB44 |
| 17 | 7.5 | 40 | 2 NO + 2 NC | 24 V DC | Removable auxiliary switch | 3RT2025-1BB44 | 3RT2025-2BB44 |
| 25 | 11 | 40 | 2 NO + 2 NC | 24 V DC | Removable auxiliary switch | 3RT2026-1BB44 | 3RT2026-2BB44 |
| 32 | 15 | 50 | 2 NO + 2 NC | 24 V DC | Removable auxiliary switch | 3RT2027-1BB44 | 3RT2027-2BB44 |
| 38 | 18.5 | 50 | 2 NO + 2 NC | 24 V DC | Removable auxiliary switch | 3RT2028-1BB44 | 3RT2028-2BB44 |
| 12 | 5.5 | 40 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Integrated varistor | 3RT2024-1DB44-3MA0 | 3RT2024-2DB44-3MA0 |
| 17 | 7.5 | 40 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Integrated varistor | 3RT2025-1DB44-3MA0 | 3RT2025-2DB44-3MA0 |
| 25 | 11 | 40 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Integrated varistor | 3RT2026-1DB44-3MA0 | 3RT2026-2DB44-3MA0 |
| 32 | 15 | 50 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Integrated varistor | 3RT2027-1DB44-3MA0 | 3RT2027-2DB44-3MA0 |
| 9 | 4 | 40 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Diode assembly plugged on front | 3RT2023-1FB44-3MA0 | 3RT2023-2FB44-3MA0 |
| 12 | 5.5 | 40 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Diode assembly plugged on front | 3RT2024-1FB44-3MA0 | 3RT2024-2FB44-3MA0 |
| 17 | 7.5 | 40 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Diode assembly plugged on front | 3RT2025-1FB44-3MA0 | 3RT2025-2FB44-3MA0 |
| 25 | 11 | 40 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Diode assembly plugged on front | 3RT2026-1FB44-3MA0 | 3RT2026-2FB44-3MA0 |
| 32 | 15 | 50 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Diode assembly plugged on front | 3RT2027-1FB44-3MA0 | 3RT2027-2FB44-3MA0 |
| 38 | 18.5 | 50 | 2 NO + 2 NC | 24 V DC | Permanently mounted auxiliary switch, Diode assembly plugged on front | 3RT2028-1FB44-3MA0 | 3RT2028-2FB44-3MA0 |
| 9 | 4 | 40 | 1 NO + 1 NC | 24 V DC | With voltage tap | 3RT2023-1BB40-0CC0 | 3RT2023-2BB40-0CC0 |
| 12 | 5.5 | 40 | 1 NO + 1 NC | 24 V DC | With voltage tap | 3RT2024-1BB40-0CC0 | 3RT2024-2BB40-0CC0 |
| 17 | 7.5 | 40 | 1 NO + 1 NC | 24 V DC | With voltage tap | 3RT2025-1BB40-0CC0 | 3RT2025-2BB40-0CC0 |
| 25 | 11 | 40 | 1 NO + 1 NC | 24 V DC | With voltage tap | 3RT2026-1BB40-0CC0 | 3RT2026-2BB40-0CC0 |
| 32 | 15 | 50 | 1 NO + 1 NC | 24 V DC | With voltage tap | 3RT2027-1BB40-0CC0 | 3RT2027-2BB40-0CC0 |
| 38 | 18.5 | 50 | 1 NO + 1 NC | 24 V DC | With voltage tap | 3RT2028-1BB40-0CC0 | 3RT2028-2BB40-0CC0 |
Coil voltages not listed are available on request. Auxiliary switches, surge suppressors and link modules are ordered separately.
Technical data and article numbers are based on Siemens catalog IC 10 · 2026 (chapter 3, contactors for switching motors) and are for information only. Image is representative.
For price, stock and lead time, use the Request a Quote button or call +90 533 945 27 94. Sending the article number is enough.
Tags: 3RT2 S0 DC, siemens contactor, 3RT2, power contactor, motor contactor, 3RT2023-1BB40, 3RT2023-2BB40, 3RT2024-1BB40, 3RT2024-2BB40, 3RT2024-1BM40, 3RT2024-2BM40, 3RT2025-1BB40, 3RT2025-2BB40, 3RT2025-1BM40, 3RT2025-2BM40, 3RT2026-1BB40, 3RT2026-2BB40, 3RT2026-1BM40, 3RT2026-2BM40, 3RT2027-1BB40, 3RT2027-2BB40, 3RT2027-1BM40, 3RT2027-2BM40, 3RT2028-1BB40, 3RT2028-2BB40, 3RT2028-1BM40, 3RT2028-2BM40, 3RT2023-1DB40, 3RT2023-2DB40, 3RT2024-1DB40, 3RT2024-2DB40, 3RT2025-1DB40, 3RT2025-2DB40, 3RT2026-1DB40, 3RT2026-2DB40, 3RT2027-1DB40, 3RT2027-2DB40, 3RT2028-1DB40, 3RT2028-2DB40, 3RT2023-1FB40, 3RT2023-2FB40, 3RT2024-1FB40, 3RT2024-2FB40, 3RT2025-1FB40, 3RT2025-2FB40, 3RT2026-1FB40, 3RT2026-2FB40, 3RT2027-1FB40, 3RT2027-2FB40, 3RT2028-1FB40, 3RT2028-2FB40, 3RT2023-1BB44, 3RT2023-2BB44, 3RT2024-1BB44, 3RT2024-2BB44, 3RT2025-1BB44, 3RT2025-2BB44, 3RT2026-1BB44, 3RT2026-2BB44, 3RT2027-1BB44, 3RT2027-2BB44, 3RT2028-1BB44, 3RT2028-2BB44, 3RT2024-1DB44-3MA0, 3RT2024-2DB44-3MA0, 3RT2025-1DB44-3MA0, 3RT2025-2DB44-3MA0, 3RT2026-1DB44-3MA0, 3RT2026-2DB44-3MA0, 3RT2027-1DB44-3MA0, 3RT2027-2DB44-3MA0, 3RT2023-1FB44-3MA0, 3RT2023-2FB44-3MA0, 3RT2024-1FB44-3MA0, 3RT2024-2FB44-3MA0, 3RT2025-1FB44-3MA0, 3RT2025-2FB44-3MA0, 3RT2026-1FB44-3MA0, 3RT2026-2FB44-3MA0, 3RT2027-1FB44-3MA0, 3RT2027-2FB44-3MA0, 3RT2028-1FB44-3MA0, 3RT2028-2FB44-3MA0, 3RT2023-1BB40-0CC0, 3RT2023-2BB40-0CC0, 3RT2024-1BB40-0CC0, 3RT2024-2BB40-0CC0, 3RT2025-1BB40-0CC0, 3RT2025-2BB40-0CC0, 3RT2026-1BB40-0CC0, 3RT2026-2BB40-0CC0, 3RT2027-1BB40-0CC0, 3RT2027-2BB40-0CC0, 3RT2028-1BB40-0CC0, 3RT2028-2BB40-0CC0