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Siemens 3RT2018-2BB42 SIRIUS Power Contactor, Size S00, 24V

MPN3RT2018-2BB42

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Siemens SIRIUS 3RT2018-2BB42 power contactor, Size S00, 24 V coil, spring-type terminals, 45 mm width, with auxiliary switch.

$40.64Ref. price · indicative, final on quote

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

Specifications

3RT2018-2BB42 — Identification
Parameter	Value
Contactor frame size	S00

3RT2018-2BB42 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated operational current, AC-4 @ 400 V	11.5 A
Rated value @ 400 V	3 A
Rated value @ 500 V	2 A
Rated value @ 690 V	1 A
Rated value @ 230 V	2 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

3RT2018-2BB42 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RT2018-2BB42 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RT2018-2BB42 — Protection & Coordination
Parameter	Value
Short-circuit coordination type 1, fuse	gG: 50A (690V,100kA), aM: 25A (690V,100kA), BS88: 50A (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)

3RT2018-2BB42 — Connection & Mounting
Parameter	Value
Main circuit connection	spring-loaded terminals
Aux. / control circuit connection	spring-loaded terminals
Conductor cross-section, solid	0.5 ... 4 mm²
Conductor cross-section, solid or stranded	2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 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

3RT2018-2BB42 — Durability
Parameter	Value
Durability (operating cycles, typ.)	30 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT2018-2BB42 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT2018-2BB42 — Mechanical
Parameter	Value
Width	45 mm
Height	70 mm
Depth	73 mm

Product details

It is a 3-pole contactor with a 24 V coil, spring-type terminals, and an integral auxiliary switch. Rated for AC-3 motor switching up to 750 operations per hour.

Minimum side spacing is 6 mm; front clearance required is 10 mm.

The 3RT2018-2BB42 is listed with a current lifecycle stage, indicating ongoing production and availability.