Skip to main content
Log in
Siemens 3RT1025-1AF00 — Contactors

Siemens 3RT1025-1AF00 SIRIUS Power Contactor, S0 Frame, 3 NO

MPN3RT1025-1AF00

Siemens SIRIUS power contactor, S0 frame, 3 NO main contacts, screw-type terminals, AC-4 rated 15.5 A at 400 V, 45 mm wide, DIN rail snap-on.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT1025-1AF00 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1AF00 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
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
3RT1025-1AF00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz110 V
3RT1025-1AF00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1AF00 — 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
3RT1025-1AF00 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control 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, solid or stranded2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1025-1AF00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1AF00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1025-1AF00 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

SIRIUS S0 power contactor — panel-fit and duty ratings

The contactor is rated for AC-4 duty at 15.5 A at 400 V, which covers reversing or inching motor loads where the contactor makes and breaks stalled-rotor current — the harsher switching condition compared to AC-3. For AC-2 at 400 V, the motor rating is 7.5 kW. Thermal and mechanical endurance are typical for the class: 10 million mechanical operations.

Coordination and wiring

Type 1 coordination (device may be damaged) allows a 63 A gL/gG fuse. Main circuit wiring accepts solid or stranded conductors: 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), or max. 2x (0.75…4 mm²). Auxiliary contact terminals take 2x (1…2.5 mm²), 2x (2.5…6 mm²), or max. 2x 10 mm². AWG equivalents are also listed: main contacts 2x (16…12), 2x (14…10), 1x 8; auxiliary contacts 2x (20…16), 2x (18…14), 1x 12.

Frequently asked questions

What are the key ratings for 3RT1025-1AF00?

AC-4 switching current is 15.5 A at 400 V; AC-2 motor rating is 7.5 kW at 400 V. The contactor has 3 NO main contacts, fits a 45 mm DIN-rail footprint, and requires a 25 A gL/gG fuse for Type 2 coordination.

Where can I buy 3RT1025-1AF00?

This part is sourced and quoted to order against an RFQ through independent industrial distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What compliance documentation does Siemens provide for 3RT1025-1AF00?

The part carries a RoHS substance prohibition date of 01.07.2006, confirming RoHS compliance. The IEC 81346-2 reference code is Q. Pollution degree 3 is specified. UL, CSA, and other agency approvals are standard for the SIRIUS line but are not individually listed in this evidence set.

MPN
3RT1025-1AF00