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Siemens 3RT2023-1BB40 SIRIUS Power Contactor, 24 VDC Coil, S

MPN3RT2023-1BB40

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Siemens SIRIUS 3RT2023-1BB40 power contactor, S0 frame, 24 VDC coil, screw terminals, 45 mm wide, 85 mm tall, 107 mm deep.

$124.23 – $222.09Ref. price · indicative, final on quote

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Siemens 3RT2023-1BB40 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2023-1BB40 — Identification
Parameter	Value
Contactor frame size	S0

3RT2023-1BB40 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated operational current, AC-4 @ 400 V	8.5 A
Rated value @ 400 V	3 A
Rated value @ 500 V	2 A
Rated value @ 690 V	1 A
Rated value @ 230 V	1 hp
Rated value @ 24 V	10 A
Rated value @ 60 V	2 A
Rated value @ 110 V	1 A
Rated value @ 220 V	0.3 A

3RT2023-1BB40 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RT2023-1BB40 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RT2023-1BB40 — Protection & Coordination
Parameter	Value
Short-circuit coordination type 1, fuse	gG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)
Short-circuit coordination type 2, fuse	gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fuse	gG: 10 A (500 V, 1 kA)

3RT2023-1BB40 — Connection & Mounting
Parameter	Value
Main circuit connection	screw-type terminals
Aux. / control circuit connection	screw-type terminals
Conductor cross-section, solid	1 ... 10 mm²
Conductor cross-section, solid or stranded	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting method	screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mounting	Yes

3RT2023-1BB40 — Durability
Parameter	Value
Durability (operating cycles, typ.)	10 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT2023-1BB40 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT2023-1BB40 — Mechanical
Parameter	Value
Width	45 mm
Height	85 mm
Depth	107 mm

Product details

Coil is 24 VDC rated, pulling in at 0.8 of rated value and dropping out reliably. Main contacts handle 10 A at 24 VDC, with a 1 hp rating at 230 V and 3 A at 400 V for general AC loads.

Sizing and Mounting

Wire range accepts solid or stranded 1–10 mm² for the main circuit; auxiliary terminals take 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²).

Switching frequency tops out at 1 000 operating cycles per hour for AC-1, AC-2, AC-3, and AC-3e duty; drops to 300 cycles per hour for AC-4 (plugging/inching).

This part is currently in the active lifecycle stage. No last-time-buy or phase-out notice applies. For a drop-in replacement with the same frame and coil voltage, the 3RT2024-2BB40 is a close functional peer — verify terminal layout if your panel was built around that variant.

Frequently asked questions

What is the listed depth of the 3RT2023-1BB40?

The depth is 107 mm.

What wire sizes does the 3RT2023-1BB40 accept?

Main circuit terminals accept solid or stranded wire from 1 to 10 mm². Auxiliary terminals accept 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) solid or stranded.