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Siemens 3RT5045-1AQ00 — Contactors

Siemens SIRIUS 3RT5045-1AQ00 Power Contactor, S3, 70 mm, 139

MPN3RT5045-1AQ00

Siemens SIRIUS S3 power contactor, 3RT5045-1AQ00, screw-type terminals, 70 mm width, 139 mm depth, rated 21.1 kW at 690 V.

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

3RT5045-1AQ00 — Identification
ParameterValue
Contactor frame sizeS3
3RT5045-1AQ00 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V21.1 kW
Rated value @ 230 V6 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT5045-1AQ00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.27
Rated value @ 50 Hz380 V
3RT5045-1AQ00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT5045-1AQ00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 160 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT5045-1AQ00 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (2.5 ... 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 and 75 mm DIN rail
Side-by-side mountingYes
3RT5045-1AQ00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT5045-1AQ00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT5045-1AQ00 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth139 mm
3RT5045-1AQ00 — Specifications
ParameterValue
At AC5 000 1/h

Product details

It measures 70 mm wide by 146 mm tall by 139 mm deep, fitting a standard DIN-rail footprint with screw and snap-on mounting onto 35 mm or 75 mm rail. Rated for 21.1 kW at 690 V, this contactor handles motor duty up to that power level. At 60 °C ambient, the power rating derates to 38 kW at 230 V, 66 kW at 400 V, and 114 kW at 690 V — the thermal curve matters if the panel runs hot.

Main circuit terminals are screw-type, accepting 2x (2.5... 16 mm²) solid or stranded, or 2x (10... 1/0) AWG. Auxiliary and control circuits also use screw terminals. An auxiliary switch extension is available as an add-on.

Compliance documentation includes RoHS and REACH substance prohibitance dated 03/01/2017. The contactor carries a degree of pollution rating of 3, suitable for industrial environments.

Frequently asked questions

What are the key dimensions for panel layout?

Width is 70 mm, height is 146 mm, and depth is 139 mm. It mounts on 35 mm or 75 mm DIN rail with side-by-side mounting allowed.

What compliance documentation is available?

RoHS and REACH compliance is documented with a substance prohibitance date of 03/01/2017. The contactor is rated for pollution degree 3.

MPN
3RT5045-1AQ00