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Siemens 3RT2518-2BM40 — Contactors

Siemens 3RT2518-2BM40 SIRIUS Contactor, Size S00, Spring Ter

MPN3RT2518-2BM40
Active

Siemens SIRIUS contactor, size S00, spring-type terminals, 3RT2518-2BM40, rated 10 A at 24 V DC, screw and snap-on 35 mm DIN rail mounting.

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

3RT2518-2BM40 — Identification
ParameterValue
Contactor frame sizeS00
3RT2518-2BM40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 230 V10 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2518-2BM40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2518-2BM40 — Contacts & Poles
ParameterValue
Main poles4
Main NO contacts2
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2518-2BM40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 35 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 20A (690V, 100kA)
Aux. switch short-circuit protection, fusefuse gG: 10 A
3RT2518-2BM40 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.5 ... 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 standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT2518-2BM40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2518-2BM40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2518-2BM40 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm
3RT2518-2BM40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

Spring-type terminals on both the coil and main circuit speed wiring: the magnet coil uses spring terminals, and the main current circuit also uses spring-loaded terminals. That means no screwdriver torque check on the line — strip, push, done. Size S00 keeps the footprint tight: 45 mm wide, 70 mm tall, 73 mm deep.

This contactor's auxiliary contacts carry a range of DC ratings that matter for control-circuit isolation. At 24 V rated value it switches 10 A; at 48 V rated value 2 A; at 60 V rated value 2 A; at 110 V rated value 1 A; at 125 V rated value 2 A; at 220 V rated value 0.3 A; at 230 V rated value 10 A; at 400 V rated value 3 A; at 440 V rated value 0.8 A; at 600 V rated value 0.1 A. AC switching rate hits 10 000 operations per hour; at AC-1 maximum it's 1 000 operations per hour. Mechanical life is typical 30 000 000 operations — that's the mechanical endurance, not the electrical, so derate for load current and switching frequency.

The solid conductor cross-section accepted is 2x (0.5 to 4 mm²) — stranded or solid, with spring terminals that grip without retightening.

Frequently asked questions

What is the closest functional second-source to 3RT2518-2BM40?

The peers 3RT2526-1BG40, 3RT2526-1BF40, and 3RT2526-1BJ80 are larger-frame contactors (size S0 vs S00). They will not drop into the same DIN footprint without panel modification — the width and terminal layout differ. Stick with the S00 frame for a direct swap.

What is the depth of 3RT2518-2BM40?

The depth is 73 mm. That's the body depth; add clearance for the spring terminals and wiring loops.

What conductor sizes does the spring terminal accept?

Solid or stranded 2x (0.5 to 4 mm²). The spring cage grips both solid and ferruled stranded without retightening.

MPN
3RT2518-2BM40