Siemens 3RT2025-1BB44-3MA0 SIRIUS Power Contactor, S0
Siemens SIRIUS 3RT2025-1BB44-3MA0 power contactor, size S0, 24 VDC coil, screw-type terminals, 3-pole, DIN rail mount, 151 mm depth, 45 mm width, 85 mm height.
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 15.5 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 3 hp |
| Rated value @ 24 V | 6 A |
| Rated value @ 60 V | 2 A |
| Rated value @ 110 V | 1 A |
| Rated value @ 220 V | 0.3 A |
| Parameter | Value |
|---|---|
| Control supply voltage type | DC |
| Parameter | Value |
|---|---|
| Main poles | 3 |
| Main NO contacts | 3 |
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Parameter | Value |
|---|---|
| Short-circuit coordination type 1, fuse | gG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA) |
| Short-circuit coordination type 2, fuse | gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA) |
| Aux. switch short-circuit protection, fuse | gG: 10 A (500 V, 1 kA) |
| Parameter | Value |
|---|---|
| Main circuit connection | screw-type terminals |
| Aux. / control circuit connection | screw-type terminals |
| Conductor cross-section, solid | 1 ... 10 mm² |
| Conductor cross-section, solid or stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Mounting method | screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715 |
| Side-by-side mounting | Yes |
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 10 000 000 |
| Durability with aux. switch block (cycles, typ.) | 10 000 000 |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 85 mm |
| Depth | 151 mm |
Product details
Frequently asked questions
What are the key ratings for the 3RT2025-1BB44-3MA0?
This SIRIUS S0 power contactor has a 24 VDC coil drawing 6 A at rated voltage, switches 3 hp at 230 V and 3 A at 400 V, with a mechanical life of 10,000,000 operations typical and maximum switching frequency of 1,000 cycles/hour in AC-3 duty.
SIRIUS S0 Power Contactor — Panel Fit and Duty Cycle
This 3RT2025-1BB44-3MA0 is a SIRIUS-branded power contactor in the S0 frame size, designed for screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715. The 24 VDC coil draws 6 A at rated voltage, with switching capacity at 230 V rated at 3 hp and at 400 V rated at 3 A — suitable for motor loads in that power band. Mechanical life is 10,000,000 operations typical, with maximum switching rates of 1,000 operations per hour in AC-1, AC-2, AC-3, and AC-3e duty, dropping to 300 per hour in AC-4.
Mounting and Clearance — Panel Integration
Dimensions are 151 mm depth, 45 mm width, and 85 mm height, occupying one S0 slot on the DIN rail with required clearances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. Mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5°, giving flexibility in crowded enclosures. The magnet coil uses screw-type terminals; main contact wiring accepts solid or stranded conductors from 1 to 10 mm², with fine-wire capability of 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²).
Environmental and Lifecycle Status
Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C, covering most industrial enclosure environments. No auxiliary switch is built into this variant, so if your BOM requires auxiliary contacts for status feedback or interlocking, those must be added as separate modules.