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Siemens 3RT1034-1AN20-1AA0 — Contactors

Siemens 3RT1034-1AN20-1AA0 SIRIUS Size S2 Power Contactor, 1

MPN3RT1034-1AN20-1AA0

Siemens SIRIUS power contactor, Size S2, 3RT1034-1AN20-1AA0, 18.5 kW at 500 V AC-3, screw-type terminals, snap-on DIN rail mount, IP20 front.

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

3RT1034-1AN20-1AA0 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-1AN20-1AA0 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V29 A
Rated value @ 400 V3 A
Rated value @ 500 V18.5 kW
Rated value @ 690 V10 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1034-1AN20-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RT1034-1AN20-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-1AN20-1AA0 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 125 A
Short-circuit coordination type 2, fusefuse gL/gG: 63 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1034-1AN20-1AA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (0.75 ... 16 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 standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1034-1AN20-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-1AN20-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-1AN20-1AA0 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth115 mm
3RT1034-1AN20-1AA0 — Specifications
ParameterValue
At AC7 ... 20 ms

Product details

The Size S2 frame is 55 mm wide and 112 mm tall, with a depth of 115 mm — that's a compact footprint for a contactor that can pull 25 mm² stranded wire on the main circuit.

Wire Termination and Protection

Main circuit terminals are screw-type, accepting 2x (0.75... 25 mm²) stranded or 2x (0.5... 4 mm²) solid. That range covers everything from small control wiring up to the heavy feeder for a 25 kW motor. The front is IP20 rated, which is standard for enclosed panels — no special handling needed.

Frequently asked questions

What wire sizes does the 3RT1034-1AN20-1AA0 accept on the main terminals?

The screw terminals accept 2x (0.75... 25 mm²) stranded or 2x (0.5... 4 mm²) solid wire. That range covers from light control wiring up to heavy motor feeders.

What are the key motor ratings for this contactor?

At 500 V AC-3 duty it is rated for 18.5 kW. At 400 V AC-2 duty it is rated for 15 kW. These cover the bulk of three-phase induction motor switching in industrial panels.

Can this contactor be mounted side-by-side without derating?

Yes, side-by-side mounting is permitted, which allows dense packing of multiple contactors on a DIN rail without needing to derate the thermal capacity.

MPN
3RT1034-1AN20-1AA0