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Siemens 3RT1025-1AR04 — Contactors

Siemens 3RT1025-1AR04 SIRIUS Power Contactor, S0 Frame, 3 NO

MPN3RT1025-1AR04

Siemens SIRIUS power contactor, S0 frame, 3 NO main contacts, screw terminals, 15.5 A AC-4 at 400 V, 7.5 kW AC-2 at 400 V, 45 mm width, DIN rail mount.

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

3RT1025-1AR04 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1AR04 — 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
3RT1025-1AR04 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz415 V
3RT1025-1AR04 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1AR04 — 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
3RT1025-1AR04 — 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
3RT1025-1AR04 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1AR04 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1025-1AR04 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

Side-by-side mounting is allowed without derating, so you can pack multiple units on a rail for multi-motor groups. Main-circuit terminals are screw-type, accepting up to 2x 10 mm² stranded or 1x 8 AWG.

Duty ratings and coordination

Type 1 coordination requires a 63 A gL/gG fuse; Type 2 coordination needs a 25 A gL/gG fuse.

Environmental and auxiliary ratings

The front of the terminal is IP20 (finger-safe); the terminal itself is IP00 (open-terminal). Auxiliary contact ratings cover DC loads: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 6 A at 230 V AC.

Frequently asked questions

What is the difference between 3RT1025-1AR04 and 3RT1023-1AL20?

The 3RT1023-1AL20 is a smaller-frame S0 contactor with a lower AC-4 rating — 9 A at 400 V versus 15.5 A on the 3RT1025-1AR04. The 3RT1025-1AR04 also has a higher AC-2 power rating (7.5 kW vs 5.5 kW at 400 V). Both share the same S0 frame width (45 mm) and DIN-rail mounting, but the 3RT1025-1AR04 carries more current for heavier motor loads.

Where can I buy 3RT1025-1AR04?

The 3RT1025-1AR04 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT1025-1AR04