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Siemens 3RT1025-1AH00 — Contactors

Siemens 3RT1025-1AH00 SIRIUS Power Contactor, S0, 3 NO, Scre

MPN3RT1025-1AH00

Siemens SIRIUS 3RT1025-1AH00 power contactor, size S0, 3 NO main contacts, screw-type terminals, 45 mm width, 85 mm height, 91 mm depth.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT1025-1AH00 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1AH00 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V10 kW
Rated value @ 690 V11 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1025-1AH00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz48 V
3RT1025-1AH00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1AH00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1025-1AH00 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1025-1AH00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1AH00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1025-1AH00 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

The 45 mm width and 85 mm height mean it fits alongside other S0 devices in a multi-row layout. For motor switching, this contactor handles 10 kW at 500 V and 11 kW at 690 V, which covers common three-phase induction motor sizes in those voltage classes.

The main circuit terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²). For larger wiring, the same terminals handle 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or a single 10 mm² conductor. In AWG, that's 2x (16 to 12), 2x (14 to 10), or 1x 8 AWG. The side-by-side mounting clearance is 6 mm, and the front face is IP20 rated while the terminals themselves are IP00.

Control circuit ratings

The coil operates at 50 Hz, with a voltage tolerance of 0.8 to 1.1 times the rated value. The rated control supply voltage at 50 Hz is 48 V. For auxiliary contact switching, the rated currents vary by voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V.

Frequently asked questions

What are the main contact ratings for this contactor?

It has three normally-open main contacts. For motor loads, it's rated for 10 kW at 500 V and 11 kW at 690 V. For reversing or plugging duty (AC-4), it's rated at 15.5 A at 400 V.

What wire sizes does the screw terminal accept?

The main circuit terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²) solid or stranded. For larger conductors, 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or a single 10 mm². In AWG, that's 2x (16 to 12), 2x (14 to 10), or 1x 8 AWG.

How does this compare to the 3RT1017-1AP01?

The 3RT1017-1AP01 is a smaller frame size (S00 vs S0) with a lower current rating. The 3RT1025-1AH00 handles higher motor loads — 10 kW at 500 V versus the S00's typical 5.5 kW at 400 V — and has a wider terminal capacity. The mounting footprint is different: S0 is 45 mm wide versus S00 at 45 mm as well, but the height and depth differ, so a direct drop-in without checking dimensions isn't guaranteed.

MPN
3RT1025-1AH00