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Siemens 3RT2023-1KB40 — Contactors

Siemens 3RT2023-1KB40 SIRIUS Contactor, 24 VDC, 10 A, Size S

MPN3RT2023-1KB40
Active

Siemens SIRIUS coupling contactor, 3RT2023-1KB40, Size S0, 24 VDC coil, 10 A rated, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail.

$44.45Ref. price · indicative, final on quote
Siemens 3RT2023-1KB40 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2023-1KB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2023-1KB40 — 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
3RT2023-1KB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2023-1KB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2023-1KB40 — 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)
3RT2023-1KB40 — 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
3RT2023-1KB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2023-1KB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2023-1KB40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

Integrator note — 3RT2023-1KB40

The Siemens 3RT2023-1KB40 is a SIRIUS coupling contactor in Size S0, rated for 24 VDC coil voltage and 10 A at 24 V rated value.

The Size S0 footprint (45 mm width, 85 mm height, 107 mm depth) fits standard panel layouts. Solid or stranded wire range 1 … 10 mm²; for auxiliary contacts, 2x (0.5 … 1.5 mm²) or 2x (0.75 … 2.5 mm²).

Switching performance and ratings

Maximum operating frequency: 1 000 1/h at AC-1, AC-2, AC-3, and AC-3e; 300 1/h at AC-4. Arcing time is 10 … 10 ms. DC switching times: 15 … 21 ms. Rated impulse withstand voltage / pollution degree not listed here, but the contactor is designed for standard industrial control panels.

Frequently asked questions

How do I get current pricing and availability for 3RT2023-1KB40?

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 3RT2023-1KB40's listed depth?

The depth is 107 mm.

What is 3RT2023-1KB40's solid wire range?

Solid wire range is 1 … 10 mm².

Will 3RT2023-1KB40 drop into a panel specified around 3RT2023-1BB44-ZX95 without rewiring?

Both are Size S0 SIRIUS contactors with the same mounting footprint (45 mm width, 85 mm height, 107 mm depth) and DIN rail attachment, so mechanical fit is identical. The coil voltage and auxiliary configuration differ — verify the coil rating and any auxiliary contact arrangement before substitution.

MPN
3RT2023-1KB40