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Siemens 3RT2018-2AK61 SIRIUS Power Contactor, Size S00

MPN3RT2018-2AK61

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Siemens SIRIUS 3RT2018-2AK61 power contactor, Size S00, 45 mm width, 73 mm depth, 70 mm height, screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715, spring-type terminals for the magnet coil.

$26.67Ref. price · indicative, final on quote

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Siemens 3RT2018-2AK61 datasheet (PDF)

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

Specifications

3RT2018-2AK61 — Identification
Parameter	Value
Contactor frame size	S00

3RT2018-2AK61 — 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

3RT2018-2AK61 — Control & Coil
Parameter	Value
Control supply voltage type	AC
Rated value @ 50 Hz	0.24
Rated value @ 50 Hz	110 V

3RT2018-2AK61 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RT2018-2AK61 — 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)

3RT2018-2AK61 — 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

3RT2018-2AK61 — Durability
Parameter	Value
Durability (operating cycles, typ.)	30 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT2018-2AK61 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT2018-2AK61 — Mechanical
Parameter	Value
Width	45 mm
Height	70 mm
Depth	73 mm

3RT2018-2AK61 — Specifications
Parameter	Value
At AC	4 ... 15 ms

Product details

Panel fit and mounting constraints

The 3RT2018-2AK61: The contactor measures 45 mm wide by 70 mm high by 73 mm deep, fitting the standard S00 footprint for DIN-rail panels.

Auxiliary contact ratings and switching capability

These are the continuous current limits for the auxiliary contacts — the arcing time sits between 10 and 15 ms at AC, and the operating time at AC ranges from 4 to 15 ms. Switching frequency limits: 1000 operations per hour at AC-1, 750/h at AC-2 and AC-3, 250/h at AC-4. The mechanical life of the contactor is typical 30 million operations.