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Siemens 3RT2023-1BM40 — Contactors

Siemens 3RT2023-1BM40 SIRIUS Power Contactor, Size S0, 24 VD

MPN3RT2023-1BM40
Active

Siemens SIRIUS 3RT2023-1BM40 power contactor, Size S0, 24 VDC coil, screw-type terminals, 45 mm wide, 107 mm deep, screw and snap-on mounting onto 35 mm DIN rail.

$38.10Ref. 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

3RT2023-1BM40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2023-1BM40 — 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 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V1 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2023-1BM40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2023-1BM40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2023-1BM40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)
Short-circuit coordination type 2, fusegG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2023-1BM40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid1 ... 10 mm²
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 60715
Side-by-side mountingYes
3RT2023-1BM40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2023-1BM40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2023-1BM40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

The 24 VDC coil (rated value 220 V, initial value 0.8, full-scale value 1.1) pulls in with screw-type terminals for the magnet coil — no spring-cage here, so expect a screwdriver for termination. Mounting is flexible: screw and snap-on onto 35 mm DIN rail per DIN EN 60715, with the mounting position allowing ±180° rotation on a vertical surface and ±22.5° tilt forward/backward. That means it fits tight enclosures where the rail isn't perfectly level or you need to angle the contactor for wire access.

Wire range accepts solid 1–10 mm² and stranded 1–10 mm², plus 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) for auxiliary contacts. The main contact wire range is 16–8 AWG — heavy enough for motor feeders up to the Size S0 rating. That -25 °C lower bound means it's fine for unheated plant areas in moderate climates; if your panel sits in a freezer or northern outdoor cabinet, check the ambient against the -25 °C floor.

Switching performance and mechanical life

Rated for 1 000 1/h at AC-1, AC-2, AC-3, and AC-3e maximum, dropping to 300 1/h at AC-4. That AC-4 rate (plugging/inching duty) is the limiting factor — if your application requires frequent reversing or jogging, the 300 cycles/hour cap governs the duty cycle, not the AC-3 figure. Mechanical life is typical 10 000 000 operations. Arcing time is 10–10 ms (essentially fixed at 10 ms). DC coil dropout time is 15–18 ms — fast enough for most safety circuits, but if you need <10 ms dropout for a safety-rated stop, consider a forced-guided contactor.

No rewiring or panel modification needed if you're replacing an existing S0 contactor with the same coil voltage.

Frequently asked questions

Where can I buy 3RT2023-1BM40?

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 depth of 3RT2023-1BM40?

The depth is 107 mm, which is the dimension from the DIN rail mounting surface to the front of the contactor.

What wire sizes does 3RT2023-1BM40 accept?

Solid wire 1–10 mm² and stranded wire 1–10 mm² for main contacts, plus 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) for auxiliary contacts.

Will 3RT2023-1BM40 drop into a panel specified for 3RT2024-1AL20-ZX95?

Both are Size S0 contactors on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. The difference is the coil voltage — 3RT2023-1BM40 uses 24 VDC, while 3RT2024-1AL20-ZX95 uses a different coil. Verify coil voltage compatibility before substituting.

MPN
3RT2023-1BM40