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Siemens 3RT1023-3BP40 — Contactors

Siemens 3RT1023-3BP40 SIRIUS Power Contactor, 230 V AC Coil,

MPN3RT1023-3BP40

Siemens SIRIUS power contactor, 3RT1023-3BP40, Size S0, 230 V AC coil, screw-type terminals, IP20 front, 45 mm width.

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

3RT1023-3BP40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-3BP40 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V4.5 kW
Rated value @ 690 V5.5 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
3RT1023-3BP40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1023-3BP40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-3BP40 — 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
3RT1023-3BP40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Side-by-side mountingYes
3RT1023-3BP40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-3BP40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-3BP40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth100 mm

Product details

SIRIUS power contactor 3RT1023-3BP40 — S0 frame, 230 V AC coil

It carries a 230 V AC coil and is rated for motor switching across common supply voltages: 4.5 kW at 500 V, 5.5 kW at 690 V in AC-3 duty, with a rated operational current of 6 A at 230 V and 3 A at 400 V.

For resistive loads (AC-12), it's good for 10 A maximum. The coil draws 5.4 W on both pick-up and hold, so there's no thermal spike from a power-saving circuit — the coil stays at full power continuously.

Side-by-side mounting is permitted with 6 mm spacing at the side. Screw terminals accept 2x (0.25 to 2.5 mm²) solid or stranded, up to 2x 10 mm² maximum. For type 2 coordination (no weld under short circuit), use a 25 A gL/gG fuse; type 1 allows a 63 A fuse.

Frequently asked questions

Where can I buy 3RT1023-3BP40 and what is the availability?

This contactor is sourced to order through independent distribution channels. Submit an RFQ for current pricing and availability confirmation at quote time.

Will 3RT1023-3BP40 drop into a panel built for 3RT1023-1AL20?

Both are S0-frame SIRIUS contactors with the same 45 mm width and DIN-rail mounting, so the mechanical fit is identical. The key difference is the coil voltage — 3RT1023-3BP40 uses a 230 V AC coil, while 3RT1023-1AL20 uses a different coil voltage. Verify coil supply before swapping.

What are the main contact ratings for 3RT1023-3BP40?

AC-3 motor ratings: 4.5 kW at 500 V, 5.5 kW at 690 V. AC-2: 4 kW at 400 V. AC-4: 8.5 A at 400 V. AC-12 resistive: 10 A. Coil is 230 V AC, 5.4 W pick-up and hold.

MPN
3RT1023-3BP40