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Siemens 3RT2018-2BB42-1AA0-ZX95 — Contactors

Siemens 3RT2018-2BB42-1AA0-ZX95 SIRIUS Power Contactor, 24 V

MPN3RT2018-2BB42-1AA0-ZX95
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Siemens SIRIUS power contactor, size S00, 24 V DC coil, spring-type terminals, 3RT2018-2BB42-1AA0-ZX95.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT2018-2BB42-1AA0-ZX95 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-2BB42-1AA0-ZX95 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V11.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V2 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2018-2BB42-1AA0-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2018-2BB42-1AA0-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-2BB42-1AA0-ZX95 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 50A (690V,100kA), aM: 25A (690V,100kA), BS88: 50A (415V,80kA)
Short-circuit coordination type 2, fusegG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2018-2BB42-1AA0-ZX95 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid0.5 ... 4 mm²
Conductor cross-section, solid or stranded2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2018-2BB42-1AA0-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-2BB42-1AA0-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-2BB42-1AA0-ZX95 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm

Product details

The S00 frame keeps the footprint tight at 45 mm wide, 70 mm tall, and 73 mm deep — that's another SKU that fits a standard DIN-rail slot without crowding the next device.

The 24 V DC coil pulls in reliably; the rated switching capacity at 24 V DC is 10 A, which covers many solenoid and small DC motor circuits. For AC motor duty, the AC-3 rating (750 operations per hour maximum) is the one that governs real-world use — it's rated for switching motors up to 2 hp at 230 V. The mechanical life of 30 million operations means this contactor will outlast most of the panel it's in, assuming the load stays within the AC-3 curve. That's a time-saver on the wireman's side — no screw torque to check, just strip to 8 mm and push in. That keeps the contactor from cooking its neighbors in a tightly packed enclosure.

The preferred position is standing on a horizontal mounting surface.

Frequently asked questions

What are the key ratings for this contactor?

24 V DC coil, 10 A at 24 V DC, 2 hp at 230 V AC. AC-3 switching frequency up to 750 operations per hour. Mechanical life of 30 million operations. Spring-type terminals accept 0.5 to 4 mm² solid or stranded wire.

What are the mounting dimensions and clearances?

Width 45 mm, height 70 mm, depth 73 mm. Clearances: 10 mm upwards, forwards, and downwards; 6 mm at the side. Mounts on 35 mm DIN rail per DIN EN 60715.

Does this contactor include an auxiliary switch?

Yes, an auxiliary switch is built into the contactor.

MPN
3RT2018-2BB42-1AA0-ZX95