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Siemens 3RT1025-1AL20 — Contactors

Siemens 3RT1025-1AL20 SIRIUS Power Contactor, S0 Frame, 11 k

MPN3RT1025-1AL20

Siemens SIRIUS power contactor, S0 frame, 3RT1025-1AL20, screw terminals, 11 kW at 690 V AC-3, 45 mm wide, IP20 front.

$108.01Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT1025-1AL20 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1AL20 — 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
3RT1025-1AL20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1025-1AL20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1AL20 — 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
3RT1025-1AL20 — 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
3RT1025-1AL20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1AL20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1025-1AL20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

Siemens 3RT1025-1AL20 SIRIUS Power Contactor — S0 Frame, Screw Terminals

It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 50022, occupying 45 mm of panel width. Rated for AC-3 duty at 11 kW on 690 V / 50 Hz and 10 kW on 500 V, it also carries a 15.5 A AC-4 rating at 400 V for reversing or plugging applications where the contactor makes and breaks stalled-rotor current. The main circuit uses screw-type terminals accepting up to 2x 10 mm² stranded or 1x 8 AWG. Auxiliary and control circuits are also screw terminals, with solid/stranded ranges from 0.5 mm² up to 4 mm² for the control side.

This is a current-production part (lifecycle stage: current). Operating temperature range is -25 °C to +60 °C, with a pollution degree rating of 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation). RoHS compliance date is listed as 1 July 2006, indicating the design meets the original EU RoHS directive.

Frequently asked questions

What is the closest functional alternative to 3RT1025-1AL20?

The 3RT1017-1AP01 is a smaller S0-frame contactor (lower current rating) and would not drop into the same panel position without checking the motor load and fuse coordination. The 3RT1025-1AL20 is the higher-rated sibling for 11 kW at 690 V AC-3; the 3RT1017-1AP01 covers lower power points in the same frame size.

What are the key specifications of 3RT1025-1AL20?

S0 frame, 45 mm wide, 85 mm high, 91 mm deep. AC-3 motor power: 11 kW at 690 V / 50 Hz, 10 kW at 500 V. AC-4 current: 15.5 A at 400 V. Screw terminals for main and auxiliary circuits. IP20 front, IP00 terminals. Operating temperature -25 °C to +60 °C.

Where can I buy 3RT1025-1AL20?

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

What compliance documentation does Siemens provide for 3RT1025-1AL20?

The part is RoHS compliant per the 1 July 2006 date. It carries an IEC 81346-2 reference code Q. The datasheet includes pollution degree 3 rating and the standard Siemens SIRIUS declaration of conformity for CE-marked markets.

MPN
3RT1025-1AL20