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Siemens 3RT2018-1AQ02 — Contactors

Siemens 3RT2018-1AQ02 SIRIUS Power Contactor, Size S00, 24 V

MPN3RT2018-1AQ02
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Siemens SIRIUS power contactor, 3RT2018-1AQ02, Size S00, 24 VDC coil, screw-type terminals, auxiliary switch, screw and snap-on mounting on 35 mm DIN rail.

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

3RT2018-1AQ02 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-1AQ02 — 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
3RT2018-1AQ02 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz380 V
3RT2018-1AQ02 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-1AQ02 — 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)
3RT2018-1AQ02 — 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
3RT2018-1AQ02 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-1AQ02 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-1AQ02 — Mechanical
ParameterValue
Width45 mm
Height58 mm
Depth73 mm
3RT2018-1AQ02 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

Panel fit and switching duty

Switching frequency varies by duty class: up to 1 000 cycles/hour for AC-1 resistive loads, 750 cycles/hour for AC-2 and AC-3 motor starting, and 250 cycles/hour for AC-4 plugging/reversing. That means this contactor handles high-rate conveyor cycling in AC-3, but you'll want to derate for frequent inching or reversing applications. The arcing time sits at 10...15 ms, and the opening time (at AC) is 4...15 ms — fast enough for most control schemes. A built-in auxiliary switch (20...12 range for main contacts) eliminates the need for a separate add-on block in many simple circuits. Coil termination uses screw-type terminals; the main circuit accepts solid or stranded wire from 0.5 to 4 mm², with options for dual conductors (2x 0.5...1.5 mm², 2x 0.75...2.5 mm², or 2x 4 mm²).

Mounting flexibility and clearances

These are the numbers to check when packing multiple contactors on a DIN rail; the 6 mm side clearance is tighter than many competitors, so plan your terminal block spacing accordingly.

Frequently asked questions

What are the key ratings for 3RT2018-1AQ02?

It is a Size S00 power contactor with a 24 VDC coil, screw-type terminals, and an integrated auxiliary switch. Switching frequency reaches 1 000 cycles/hour for AC-1, 750 cycles/hour for AC-3, and 250 cycles/hour for AC-4. Operating temperature range is -25 to +60 °C.

Where can I buy 3RT2018-1AQ02 and how is it quoted?

This contactor is sourced through independent distribution channels. Submit an RFQ for volume pricing and availability; lead time and stock position are confirmed at quote time.

Will 3RT2018-1AQ02 drop into a panel specified for 3RT2016-1AK22?

Both are Size S00 SIRIUS contactors on the same 45 mm DIN-rail footprint, so mechanical fit is identical — same width, same rail clip, same clearance requirements. The difference is in the coil voltage and auxiliary configuration; verify your control voltage matches the 24 VDC coil before swapping.

What compliance documentation is available for 3RT2018-1AQ02?

As a Siemens SIRIUS product, it carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1 standards for contactors. RoHS and REACH compliance documentation is provided with the shipment upon request.

MPN
3RT2018-1AQ02