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Siemens 3RT2018-4AG61 — Contactors

Siemens 3RT2018-4AG61 SIRIUS Power Contactor, S00, 100-110VA

MPN3RT2018-4AG61

Siemens SIRIUS 3RT2018-4AG61 power contactor, size S00, 100 V at 50 Hz / 110 V at 60 Hz coil, screw and snap-on mounting onto 35 mm DIN rail.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT2018-4AG61 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-4AG61 — 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
3RT2018-4AG61 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.24
Rated value @ 50 Hz100 V
3RT2018-4AG61 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-4AG61 — 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)
3RT2018-4AG61 — Connection & Mounting
ParameterValue
Main circuit connectionRing cable lug connection
Aux. / control circuit connectionring terminal lug connection
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2018-4AG61 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-4AG61 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-4AG61 — Mechanical
ParameterValue
Width45 mm
Height58 mm
Depth73 mm
3RT2018-4AG61 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

The coil is rated at 100 V at 50 Hz and 110 V at 60 Hz, drawing 0.24 A at 50 Hz and 0.25 A at 60 Hz — a key figure for sizing the control transformer supplying the coil.

The contactor carries rated operational currents at multiple voltage levels: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.2 A at 440 V, 14 A at 480 V, and 2 A at 500 V. These are the currents the main poles can make and break under specified conditions — the 14 A at 480 V figure, for instance, tells you it handles a 480 V motor load up to that current. At 230 V it is rated for 2 hp, which maps to a typical small pump or fan motor. The switching frequency varies by duty class: up to 1,000 operations per hour at AC-1 (resistive), 750 per hour at AC-2 and AC-3 (motor starting/running), and 250 per hour at AC-4 (plugging/inching). For a conveyor application running AC-3 duty, the 750 ops/h limit governs the cycle rate.

The contactor has a mechanical service life of 30,000,000 operations typical — a figure that assumes proper coil voltage and load within ratings.

Physical dimensions and auxiliary contacts

The width is the critical panel-space figure — at 45 mm, it occupies one standard 45 mm-wide DIN-rail module slot. The magnet coil connection uses a ring cable lug, which means the installer needs to crimp ring terminals onto the control wiring.

Frequently asked questions

What are the key dimensions for panel fit?

The contactor measures 45 mm wide, 58 mm high, and 73 mm deep. It mounts on 35 mm DIN rail and requires 10 mm clearance upwards, forwards, and downwards, plus 6 mm at the sides.

What coil voltage does this contactor use?

The coil is rated at 100 V at 50 Hz and 110 V at 60 Hz, drawing 0.24 A at 50 Hz and 0.25 A at 60 Hz.

What is the maximum switching frequency for motor loads?

For AC-3 duty (motor starting and running), the maximum switching frequency is 750 operations per hour. For AC-4 duty (plugging/inching), it is 250 operations per hour.

MPN
3RT2018-4AG61