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Siemens 3RT6025-1KF40 — Contactors

Siemens 3RT6025-1KF40 SIRIUS Coupling Contactor, 110 V Coil,

MPN3RT6025-1KF40

Siemens SIRIUS coupling contactor, 3RT6025-1KF40, 110 V coil, AC-3 rated 690 V, 23 kW at 400 V, screw terminals, DIN rail mount.

Siemens 3RT6025-1KF40 datasheet (PDF)
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

3RT6025-1KF40 — Identification
ParameterValue
Contactor frame sizeS0
3RT6025-1KF40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT6025-1KF40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT6025-1KF40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT6025-1KF40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 63 A
Short-circuit coordination type 2, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT6025-1KF40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 DIN rail according to DIN EN 50022
Side-by-side mountingYes
3RT6025-1KF40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT6025-1KF40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT6025-1KF40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

Its 110 V coil and AC-3 rating up to 690 V mean it handles a 23 kW motor at 400 V or 40 kW at 690 V in standard three-phase duty. The built-in varistor surge suppressor protects the coil circuit from voltage spikes, so you don't need an external snubber on the control side.

Main current circuit and auxiliary/control circuit both use screw-type terminals. Accepts 2x (0.5…1.5 mm²) solid or stranded on the control side, and 2x (16…12 AWG) or 2x (14…8 AWG) for the main contacts. Minimum permissible conductor cross-section at 40 °C and 60 °C is 10 mm².

Frequently asked questions

What is the closest functional second-source for 3RT6025-1KF40?

The closest peer is 3RT6023-1BW40, but the 3RT6025-1KF40 carries a 110 V coil and higher motor power ratings (23 kW at 400 V vs the 3RT6023 frame's lower output). They share the same S0 size and DIN rail footprint, so a panel designed for the 3RT6023-1BW40 can accept the 3RT6025-1KF40 without rewiring the mounting or bus bars — just verify the coil voltage matches your control circuit.

Where can I buy 3RT6025-1KF40?

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

What compliance documentation does Siemens provide for 3RT6025-1KF40?

The part carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance from that date. Standard Siemens documentation includes the declaration of conformity and CE marking; specific UL or IEC certificates are available on request through the RFQ process.

MPN
3RT6025-1KF40