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Siemens 3RT1025-1XF44-0LA2 — Contactors

Siemens 3RT1025-1XF44-0LA2 SIRIUS S0 Power Contactor, 110 V

MPN3RT1025-1XF44-0LA2

Siemens SIRIUS 3RT1025-1XF44-0LA2, size S0 power contactor, 110 V DC coil, screw-type main circuit terminals, IP20 front, snap-on 35 mm DIN rail mounting.

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

3RT1025-1XF44-0LA2 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1XF44-0LA2 — 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 V3 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1025-1XF44-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1025-1XF44-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1XF44-0LA2 — 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
3RT1025-1XF44-0LA2 — 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
3RT1025-1XF44-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1XF44-0LA2 — Mechanical
ParameterValue
Width45 mm
Height116 mm
Depth150 mm

Product details

AC-4 switching capacity and terminal data

The 3RT1025-1XF44-0LA2: For the demanding AC-4 duty cycle (plugging / inching of motors), the contactor is rated at 15.5 A at 400 V. The main circuit screw terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). The coil draws 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — these are the holding currents at rated DC voltage.

Maintain at least 10 mm clearance upwards, forwards, downwards, and at the sides for heat dissipation and arc containment.

Frequently asked questions

Where can I buy 3RT1025-1XF44-0LA2?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the closest functional second-source for 3RT1025-1XF44-0LA2?

The peer 3RT1025-1AN24 is a size S0 contactor from the same SIRIUS family, but it uses an AC coil (230 V 50 Hz / 277 V 60 Hz) rather than the 110 V DC coil of this unit. The mechanical footprint and terminal layout are identical, so it will drop into the same panel without rewiring, but the coil voltage is different — verify the control circuit before substitution.

What is 3RT1025-1XF44-0LA2's listed depth?

The depth is 150 mm, with a width of 45 mm and a height of 116 mm.

What wire sizes does the screw terminal accept?

The main circuit screw terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²).

MPN
3RT1025-1XF44-0LA2