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Siemens 3RT2018-2FB41 — Contactors

Siemens 3RT2018-2FB41 SIRIUS Power Contactor, 24 VDC Coil, S

MPN3RT2018-2FB41
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Siemens SIRIUS 3RT2018-2FB41 power contactor, size S00, 24 VDC coil, spring-type terminals, 10 A at 24 V DC, screw and snap-on 35 mm DIN rail mount.

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

3RT2018-2FB41 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-2FB41 — 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
3RT2018-2FB41 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2018-2FB41 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-2FB41 — 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)
3RT2018-2FB41 — 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
3RT2018-2FB41 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-2FB41 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-2FB41 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm

Product details

The 24 V DC coil is rated for a 10 A switching capacity at the same voltage, so it can handle moderate DC loads like small DC motors or solenoid valves directly. Switching frequency limits depend on the duty class: 1,000 operations per hour at AC-1 (resistive loads), 750 per hour at AC-2 and AC-3 (motor starting/running), and 250 per hour at AC-4 (plugging or inching). The AC-3e rating also allows 750 ops/hour for energy-efficient motors. These numbers tell you the contactor can keep up with a fast-cycling packaging line but needs derating for heavy inching duty. Mechanical life is typical 30 million cycles, with main contact electrical life between 20 and 12 million cycles depending on load. That puts this in the workhorse category for a panel that sees regular but not continuous switching — think batch processing rather than a 24/7 conveyor.

Spring-type terminals on the coil mean no screw tightening — just strip to 8 mm and push in. That's tight enough for a crowded DIN rail but leaves room for wiring ducts if you plan ahead.

Frequently asked questions

What are the key dimensions for panel layout?

The contactor measures 73 mm deep, 45 mm wide, and 70 mm high. Clearance requirements are 10 mm upwards, forwards, and downwards, and 6 mm at the sides.

What wire sizes does the spring terminal accept?

The spring-type terminals accept solid or stranded wire from 0.5 to 4 mm², and can take two conductors of the same range per terminal.

What is the switching capacity at 24 V DC?

At 24 V DC rated value, the contactor switches 10 A. At higher DC voltages the rating drops: 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V.

Does this contactor include an auxiliary switch?

Yes, an auxiliary switch is included as standard on this model.

MPN
3RT2018-2FB41