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Siemens 3RT2018-2AD01 — Contactors

Siemens 3RT2018-2AD01 SIRIUS Power Contactor, S00, 24 VDC

MPN3RT2018-2AD01
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Siemens SIRIUS 3RT2018-2AD01 power contactor, size S00, 24 VDC coil, spring-type terminals on coil, screw and snap-on 35 mm DIN rail mount, 10 A at 24 V.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT2018-2AD01 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-2AD01 — 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
3RT2018-2AD01 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz42 V
3RT2018-2AD01 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-2AD01 — 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)
3RT2018-2AD01 — 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
3RT2018-2AD01 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-2AD01 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-2AD01 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm
3RT2018-2AD01 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, with a compact footprint of 70 mm height, 45 mm width, and 73 mm depth. The coil uses spring-type terminals for fast wiring. Rated switching current at 24 V is 10 A, with auxiliary switch integrated. Maximum mechanical switching frequency for AC-1 duty is 1000 operations per hour, dropping to 750/h for AC-3 and 250/h for AC-4. Clearance requirements: 10 mm upward, downward, and forward; 6 mm at the sides.

The spring-type coil terminals reduce wiring time compared to screw terminals — no torque driver needed. The S00 frame size leaves room alongside other SIRIUS components on the same DIN rail. For panels with tight depth constraints, the 73 mm depth fits standard 80 mm deep enclosures with clearance to spare. The 24 VDC coil holds in at nominal voltage; pick-up and drop-out characteristics follow standard Siemens SIRIUS contactor curves. The integrated auxiliary switch provides one N/O + one N/C contact for status feedback or interlocking without an add-on block.

Frequently asked questions

What are the key ratings for this contactor?

The 3RT2018-2AD01 is a size S00 contactor rated for 10 A at 24 VDC coil voltage. Maximum switching frequency is 1000 operations/hour for AC-1 resistive loads, 750/h for AC-3 motor loads, and 250/h for AC-4 plugging/inching duty. Operating temperature range is -25 to +60 °C.

What wire sizes does the 3RT2018-2AD01 accept?

The main contact terminals accept solid or stranded conductors from 0.5 to 4 mm², and can accept two conductors of the same size per terminal. The coil uses spring-type terminals.

What are the mounting dimensions and clearances?

The contactor measures 70 mm high, 45 mm wide, and 73 mm deep. It mounts on 35 mm DIN rail per DIN EN 60715 via screw or snap-on. Required clearances: 10 mm upward, downward, and forward; 6 mm at the sides.

Does the 3RT2018-2AD01 include an auxiliary contact block?

Yes, an auxiliary switch is integrated into the contactor. This provides at least one set of auxiliary contacts for feedback or interlocking without requiring a separate add-on module.

MPN
3RT2018-2AD01