Skip to main content
Log in
Siemens 3RT1023-1BM44 — Contactors

Siemens 3RT1023-1BM44 SIRIUS Power Contactor, 220 VAC Coil,

MPN3RT1023-1BM44

Siemens SIRIUS power contactor, 3RT1023-1BM44, S0 frame, 220 VAC coil, screw-type terminals, IP20 front, 45 x 85 x 150 mm.

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

3RT1023-1BM44 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1BM44 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
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
3RT1023-1BM44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1023-1BM44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1BM44 — 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
3RT1023-1BM44 — 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
3RT1023-1BM44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1BM44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1023-1BM44 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth150 mm

Product details

SIRIUS S0 power contactor, 220 VAC coil

Both main and auxiliary/control circuits use screw-type terminals. Main terminals accept 2x (1.0–2.5 mm²) solid/stranded, 2x (2.5–6 mm²), or max 2x 10 mm². Auxiliary terminals accept 2x (0.5–1.5 mm²) solid, 2x (0.75–2.5 mm²), or max 2x (0.75–4 mm²). AWG equivalents are listed for both. Coil power draw is 5.4 W DC for both closing and holding — a single value, meaning the magnet circuit does not drop to a lower hold power. This matters for control-transformer sizing and DC-supply budgeting in the panel.

For Type 1 coordination (welding allowed but no fire risk), the fuse rating is gL/gG 63 A. These are the manufacturer's specified limits for the main circuit. Storage temperature range is wider but not specified here — the operating range governs panel placement and derating.

Switching ratings and load types

AC-2 duty (slip-ring motors) at 400 V: 4 kW. AC-4 duty (plugging/inching) at 400 V: 8.5 A. DC switching ratings are provided per voltage: 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. These cover the auxiliary contact block's DC load-breaking capability — relevant for PLC inputs, DC brake coils, or indicator lamps. Motor power ratings at higher line voltages: 4.5 kW at 500 V, 5.5 kW at 690 V — typical for 500 V or 690 V industrial networks (mining, marine, heavy industry).

Substance prohibitance date is listed as 01.07.2006, aligning with RoHS compliance (EU RoHS took effect July 2006).

Frequently asked questions

Where can I buy 3RT1023-1BM44 and how do I get a price?

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 inquiry for a firm commercial offer.

What is 3RT1023-1BM44's listed depth?

The depth is 150 mm, with a width of 45 mm and height of 85 mm — the standard S0 frame footprint for DIN-rail mounting.

What compliance documentation does this brand provide for 3RT1023-1BM44?

The part carries a RoHS compliance date of 01.07.2006 and an IEC 81346-2 reference code Q. The manufacturer provides standard declarations of conformity for CE, UL, and CSA upon request through the supply channel.

Will 3RT1023-1BM44 drop into a panel specified around 3RT1016-1BB42?

Both are SIRIUS S0-frame contactors with the same 45 mm width and DIN-rail mounting, so the mechanical footprint is identical. The key difference is the coil voltage — the 3RT1023-1BM44 uses a 220 VAC coil, while the 3RT1016-1BB42 uses a different coil voltage. Verify the control circuit voltage before swapping.

MPN
3RT1023-1BM44