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Siemens 3RT2025-1BB44 SIRIUS Power Contactor, 24 V Coil

MPN3RT2025-1BB44

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Siemens SIRIUS 3RT2025-1BB44 power contactor, size S0, 24 V coil, screw-type terminals, DIN rail mount.

$53.64Ref. price · indicative, final on quote

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Siemens 3RT2025-1BB44 datasheet (PDF)

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

Specifications

3RT2025-1BB44 — Identification
Parameter	Value
Contactor frame size	S0

3RT2025-1BB44 — 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	6 A
Rated value @ 60 V	2 A
Rated value @ 110 V	1 A
Rated value @ 220 V	0.3 A

3RT2025-1BB44 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RT2025-1BB44 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RT2025-1BB44 — 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)

3RT2025-1BB44 — 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

3RT2025-1BB44 — Durability
Parameter	Value
Durability (operating cycles, typ.)	10 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT2025-1BB44 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT2025-1BB44 — Mechanical
Parameter	Value
Width	45 mm
Height	85 mm
Depth	151 mm

Product details

What This Contactor Is

It is designed for switching loads in control panels, commonly used for motor starting, resistive heating, and DC circuit control.

The product brand is SIRIUS, and the designation is a power contactor. No auxiliary switch is integrated (: Auxiliary Switch: No), so if auxiliary contacts are needed, a separate block must be added.

Integration Details

Depth is 151 mm, width 45 mm, height 85 mm — compact enough for typical control enclosures. Solid or stranded conductors from 1 to 10 mm² are accepted for main contacts; for auxiliary wiring (if using an external block), 2×(0.5 to 1.5 mm²) or 2×(0.75 to 2.5 mm²) can be used. The coil connection uses screw-type terminals.