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Siemens 3RT2025-2BB40 SIRIUS Power Contactor, S0, 24V DC, 10

MPN3RT2025-2BB40

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Siemens SIRIUS 3RT2025-2BB40 Power Contactor, S0 frame, 24 V DC coil, spring-type terminals, 45 mm width, 107 mm depth.

$50.80Ref. price · indicative, final on quote

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Siemens 3RT2025-2BB40 datasheet (PDF)

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

Specifications

3RT2025-2BB40 — Identification
Parameter	Value
Contactor frame size	S0

3RT2025-2BB40 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated operational current, AC-4 @ 400 V	15.5 A
Rated value @ 400 V	3 A
Rated value @ 500 V	2 A
Rated value @ 690 V	1 A
Rated value @ 230 V	3 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

3RT2025-2BB40 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RT2025-2BB40 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RT2025-2BB40 — 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)

3RT2025-2BB40 — Connection & Mounting
Parameter	Value
Main circuit connection	spring-loaded terminals
Aux. / control circuit connection	spring-loaded terminals
Conductor cross-section, solid	1 ... 10 mm²
Conductor cross-section, solid or stranded	2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 1.5 mm²)
Mounting method	screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mounting	Yes

3RT2025-2BB40 — Durability
Parameter	Value
Durability (operating cycles, typ.)	10 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT2025-2BB40 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT2025-2BB40 — Mechanical
Parameter	Value
Width	45 mm
Height	102 mm
Depth	107 mm

Product details

How it stacks up against a peer

Out here in the grease, if a panel was spec'd around the 3RT2026-1FB44-3MA0, this 3RT2025-2BB40 shares the same S0 frame dimensions — 45 mm wide, 102 mm tall, 107 mm deep — so it'll drop onto the same DIN rail without resizing. But I'd check the coil voltage and auxiliary contact layout before calling it a straight swap; those little differences can trip you up mid-install.

This contactor is a current-production Siemens SIRIUS part — no phase-out, no LTB window to chase. We can quote it to your BOM line with normal supply lead times. Send an RFQ for your quantity and we'll confirm availability.