Skip to main content
Siemens 3RT2018-1FB41 — Contactors

Siemens 3RT2018-1FB41 SIRIUS S00 Contactor, 24V Coil

MPN3RT2018-1FB41
Active

Siemens SIRIUS, power contactor, 3RT2018-1FB41, size S00, 24 V DC coil, 10 A at 24 V, current production, 45 x 58 x 73 mm.

$45.72Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT2018-1FB41 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-1FB41 — 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
3RT2018-1FB41 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2018-1FB41 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-1FB41 — 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)
3RT2018-1FB41 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid0.5 ... 4 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2018-1FB41 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-1FB41 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-1FB41 — Mechanical
ParameterValue
Width45 mm
Height58 mm
Depth73 mm

Product details

S00 Contactor for 24 Vdc Control

Rated for ambient operation between -25 °C and +60 °C, with storage range -55 °C to +80 °C.

DIN Rail Mounting and Clearance

These clearances ensure proper convection cooling and access for wiring. Dimensions: 45 mm width, 58 mm height, 73 mm depth. The 73 mm depth is a key figure for shallow junction boxes.

Frequently asked questions

What are the depth and mounting clearances?

The depth is 73 mm. Minimum clearance: 10 mm above, 10 mm below, 10 mm forward, and 6 mm at the sides.

What wire sizes fit the power terminals?

Solid or stranded conductors from 0.5 mm² to 4 mm² are accepted. Dual-wire combinations also listed: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), and 2x 4 mm².

What is the switching frequency for motor loads?

AC-3 (motor) maximum is 750 operations per hour. AC-4 (heavy inrush) is 250 ops/h.

MPN
3RT2018-1FB41