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Siemens 3RT1025-1AN20 — Contactors

Siemens 3RT1025-1AN20 SIRIUS Power Contactor, Size S0, 7.5 k

MPN3RT1025-1AN20

Siemens SIRIUS, Size S0 power contactor, 3RT1025-1AN20, screw-type terminals, 7.5 kW AC-2 at 400 V, 15.5 A AC-4 at 400 V, IP20 front / IP00 terminals, screw and snap-on 35 mm DIN rail.

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

3RT1025-1AN20 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1AN20 — 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
3RT1025-1AN20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RT1025-1AN20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1AN20 — 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
3RT1025-1AN20 — 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
3RT1025-1AN20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1AN20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1025-1AN20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

The Siemens 3RT1025-1AN20 is a SIRIUS power contactor in the Size S0 frame, rated for 7.5 kW at AC-2 duty on a 400 V line and 15.5 A at AC-4 on the same voltage.

Coordination and mounting

Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination calls for a 25 A gL/gG fuse. Side-by-side mounting is permitted, which keeps the panel fill factor tight — the 45 mm width per contactor stacks cleanly on the DIN rail.

Terminal capacity

Main circuit screw terminals accept solid or stranded: 2x (1... 2.5 mm²), 2x (2.5... 6 mm²), max. 2x 10 mm². Auxiliary and control circuit terminals take 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), max. 2x (0.75... 4 mm²). AWG equivalents: main contacts 2x (16... 12), 2x (14... 10), 1x 8; auxiliary contacts 2x (20... 16), 2x (18... 14), 1x 12.

Frequently asked questions

Where can I buy 3RT1025-1AN20 and get a price?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What are the key ratings for 3RT1025-1AN20?

Rated 7.5 kW at AC-2 400 V and 15.5 A at AC-4 400 V. Size S0 frame, screw terminals, DIN rail mount, operating temperature -25 to +60 °C.

What compliance documentation does this contactor have?

RoHS compliance dated 01.07.2006. The product is a Siemens SIRIUS power contactor, reference code Q per IEC 81346-2.

Will 3RT1025-1AN20 drop into a panel specified for 3RT1026-1AB00?

Both are Size S0 contactors with screw terminals and the same DIN rail footprint, so the mechanical fit is identical. The difference is in the electrical ratings — verify your load current against the 3RT1025-1AN20's AC-3 and AC-4 values before substituting.

MPN
3RT1025-1AN20