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Siemens 3RT1025-1BP40 — Contactors

Siemens SIRIUS 3RT1025-1BP40 Power Contactor, S0, 230 V Coil

MPN3RT1025-1BP40

Siemens SIRIUS power contactor, 3RT1025-1BP40, S0 frame, 230 V AC coil, screw-type terminals, IP20 front, 45 mm width.

$303.00Ref. price · indicative, final on quote
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

3RT1025-1BP40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1BP40 — 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
3RT1025-1BP40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1025-1BP40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1BP40 — 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
3RT1025-1BP40 — 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
3RT1025-1BP40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1BP40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1025-1BP40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth101 mm

Product details

The 230 V AC coil pulls 5.4 W during both closing and holding — no power drop after pickup, which matters when the control transformer is sized tight.

Terminals and wiring

Both main and auxiliary circuits use screw-type terminals. Main terminals accept 2x (1 to 2.5 mm²) solid or stranded, up to 2x 6 mm², max 2x 10 mm². Auxiliary terminals take 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) stranded, max 2x 4 mm². AWG equivalents are listed for both: main 2x (16 to 12), 2x (14 to 10), 1x 8; auxiliary 2x (20 to 16), 2x (18 to 14), 1x 12. That covers most panel wire from 1.5 mm² control circuits up to 10 mm² motor feeds. IP20 on the front face, IP00 at the terminals — standard for an open-panel contactor. The terminal shroud is the panel builder's call if the enclosure IP rating requires it.

Switching capacity and coordination

Rated operational current at AC-12 (resistive) is 10 A maximum. Motor-duty ratings: at AC-2 at 400 V it handles 7.5 kW; at AC-4 at 400 V it carries 15.5 A — that's the reversing or inching duty cycle, where the contactor makes and breaks full load current. At 690 V, the motor rating is 11 kW. For DC switching: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, 3 A at 400 V, 10 kW at 500 V. Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination calls for 25 A gL/gG. That's the short-circuit protection the contactor needs to stay functional after a fault — spec it into the feeder design, not after.

Frequently asked questions

What is the depth of the 3RT1025-1BP40?

The depth is 101 mm. Width is 45 mm, height is 85 mm — standard S0 envelope that fits alongside other SIRIUS contactors on the same DIN rail.

What wire sizes fit the main and auxiliary terminals?

Main terminals accept 2x (1 to 2.5 mm²) solid or stranded, up to 2x 6 mm², max 2x 10 mm². Auxiliary terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded, max 2x 4 mm². AWG equivalents are provided in the spec table.

Does the 3RT1025-1BP40 drop into a panel wired for the 3RT1026-1AB00?

Both are S0 frame contactors with the same 45 mm width and screw-type terminals, so the footprint and DIN rail position match. The main difference is the coil voltage — this one is 230 V AC, while the 3RT1026-1AB00 uses a different coil rating. Verify the control circuit voltage before swapping.

Where can I buy the 3RT1025-1BP40?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time, not before.

MPN
3RT1025-1BP40