The S0 frame size with 45 mm width and 85 mm height keeps panel density reasonable; the 140 mm depth means it fits standard 200 mm deep enclosures with room for wiring behind the rail. Screw-type terminals on the main current circuit accept 2x (0.5...1.5 mm²) solid or 2x (0.75...2.5 mm²) stranded, with a maximum of 2x (0.75...4 mm²) — enough for most motor control circuits up to the contactor's rating.
Siemens 3RT1025-1AL24-3MA0 SIRIUS Power Contactor, Size S0,
MPN3RT1025-1AL24-3MA0
Siemens SIRIUS 3RT1025-1AL24-3MA0 power contactor, Size S0, 45 mm width, screw-type terminals, snap-on 35 mm DIN rail mount, pollution degree 3, current production.
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-4 @ 400 V | 15.5 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 10 kW |
| Rated value @ 690 V | 11 kW |
| Rated value @ 230 V | 6 A |
| Rated value @ 24 V | 10 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 | AC |
| Rated value @ 50 Hz | 0.8 ... 1.1 |
| Rated value @ 50 Hz | 230 V |
| 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 | fuse gL/gG: 63 A |
| Short-circuit coordination type 2, fuse | fuse gL/gG: 25 A |
| Aux. switch short-circuit protection, fuse | fuse gL/gG: 10 A |
| Parameter | Value |
|---|---|
| Main circuit connection | screw-type terminals |
| Conductor cross-section, solid | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| 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 |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 85 mm |
| Depth | 140 mm |
Product details
Frequently asked questions
What are the key dimensions for panel planning?
Width is 45 mm, height is 85 mm, and depth is 140 mm. This Size S0 contactor fits standard 200 mm deep enclosures on 35 mm DIN rail.
What wire sizes does the screw terminal accept?
The main current circuit screw terminals accept 2x (0.5...1.5 mm²) solid, 2x (0.75...2.5 mm²) stranded, and a maximum of 2x (0.75...4 mm²).
What is the operating temperature range?
The contactor is rated for operation from -25 to +60 °C, covering most industrial plant-floor conditions without derating.
MPN
3RT1025-1AL24-3MA0