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Siemens 3RT2018-1AB01-0UA0 — Contactors

Siemens 3RT2018-1AB01-0UA0 SIRIUS S00 Power Contactor, 45mm

MPN3RT2018-1AB01-0UA0
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Siemens SIRIUS S00 power contactor, 3RT2018-1AB01-0UA0, screw-type terminals, integrated auxiliary switch, 45 mm width, current production.

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

3RT2018-1AB01-0UA0 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-1AB01-0UA0 — 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
3RT2018-1AB01-0UA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz24 V
3RT2018-1AB01-0UA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-1AB01-0UA0 — 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)
3RT2018-1AB01-0UA0 — 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
3RT2018-1AB01-0UA0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-1AB01-0UA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-1AB01-0UA0 — Mechanical
ParameterValue
Width45 mm
Height58 mm
Depth73 mm
3RT2018-1AB01-0UA0 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

This variant includes an integrated auxiliary switch (1 NO + 1 NC by default on the S00 frame), which saves a separate aux block and one DIN slot. The coil terminals are screw-type, matching the main power terminals — consistent termination method across the device.

Electrical life depends on the switching category: at AC-1 (resistive loads like heaters) it can cycle up to 1,000 operations per hour; at AC-3 (standard squirrel-cage motors) it's 750 per hour; at AC-4 (plugging/inching duty) it drops to 250 per hour. For a conveyor line running at 30 starts per hour, that AC-3 figure leaves ample headroom. The auxiliary contact ratings are given per voltage: 10 A at 24 V, 2 A at 48/60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. These are the make/break capacities for the aux circuit — a 24 VDC PLC output driving a relay coil will see the 10 A capability, while a 220 VAC pilot light is limited to 0.3 A. The 2 hp rating at 230 V confirms motor-switching capability on single-phase loads. The 60 °C ceiling is the limiting factor inside a sealed enclosure — derating may apply above 40 °C, but the datasheet's thermal curve (not reproduced here) governs that.

Wiring and clearances

For double ferrules, the spec allows 2×(0.5–1.5 mm²), 2×(0.75–2.5 mm²), or 2×4 mm². Depth is 73 mm, height 58 mm.

The 3RT2018 is a higher-rated variant in the same S00 frame — same footprint, same DIN rail clip, same terminal layout.

Frequently asked questions

What is the depth of this contactor?

73 mm from the mounting surface to the farthest projection, not including wiring overhang.

What wire sizes does the terminal accept?

Solid or stranded wire from 0.5 to 4 mm², and double conductors up to 2×4 mm².

MPN
3RT2018-1AB01-0UA0