Siemens 3RT2018-2BB44-3MA0 SIRIUS Contactor, Size S00, 45 mm

Specifications

3RT2018-2BB44-3MA0 — Identification
Parameter	Value
Contactor frame size	S00

3RT2018-2BB44-3MA0 — 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	6 A
Rated value @ 60 V	2 A
Rated value @ 110 V	1 A
Rated value @ 220 V	0.3 A

3RT2018-2BB44-3MA0 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RT2018-2BB44-3MA0 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RT2018-2BB44-3MA0 — 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)

3RT2018-2BB44-3MA0 — 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

3RT2018-2BB44-3MA0 — Durability
Parameter	Value
Durability (operating cycles, typ.)	10 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT2018-2BB44-3MA0 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

Product details

Panel fit and mounting — size S00 on DIN rail

The 3RT2018-2BB44-3MA0 is a Siemens SIRIUS power contactor in the size S00 frame, measuring 45 mm wide, 70 mm high, and 121 mm deep.

The magnet coil uses spring-type terminals — no screw tightening needed, which speeds wiring and eliminates torque checks.

Rated for 10 million mechanical operations typical. Maximum switching rates: 1,000 cycles/hour in AC-1, 750 in AC-2 and AC-3, and 250 in AC-4.

DC make/break time is 7–13 ms.