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Siemens 3RT1025-3KF44-0LA0 — Contactors

Siemens SIRIUS 3RT1025-3KF44-0LA0 Power Contactor, 110 V Coi

MPN3RT1025-3KF44-0LA0

Siemens SIRIUS power contactor, size S0, 110 V DC coil, screw-type main terminals, spring-loaded auxiliary terminals, IP20 front, 153 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

3RT1025-3KF44-0LA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-3KF44-0LA0 — 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
3RT1025-3KF44-0LA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1025-3KF44-0LA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-3KF44-0LA0 — 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
3RT1025-3KF44-0LA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 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 (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1025-3KF44-0LA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-3KF44-0LA0 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Installation altitude, max.2 000 m
3RT1025-3KF44-0LA0 — Mechanical
ParameterValue
Width70 mm
Height88 mm
Depth153 mm

Product details

For motor duty, the contactor delivers 7.5 kW at AC-2 (400 V) and 15.5 A at AC-4 (400 V), covering standard squirrel-cage motor starting and plugging/inching applications. Resistive load handling reaches 10 A at AC-12 maximum. The coil draws 23 W on closing and 7 W holding, with a varistor surge suppressor built in for DC switching.

Type 1 coordination requires 63 A. The contactor is rated for pollution degree 3 and operates from -40 °C to +70 °C, with IP20 protection on the front and IP00 at the terminals. The auxiliary contact block supports DC switching at 110 V (1 A), 24 V (10 A), 60 V (2 A), 220 V (0.3 A), 230 V (6 A), 400 V (3 A), 500 V (10 kW), and 690 V (11 kW).

Frequently asked questions

What is 3RT1025-3KF44-0LA0's listed depth?

The depth is 153 mm.

MPN
3RT1025-3KF44-0LA0