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Siemens 3RT1044-1AD00 — Contactors

Siemens 3RT1044-1AD00 SIRIUS Power Contactor, 37 kW at 500 V

MPN3RT1044-1AD00

Siemens SIRIUS 3RT1044-1AD00 power contactor, size S3, 37 kW at 500 V AC, 18.6 kW at 690 V AC, screw-type terminals, screw and snap-on mounting onto 35 mm and 75 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

3RT1044-1AD00 — Identification
ParameterValue
Contactor frame sizeS3
3RT1044-1AD00 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V55 A
Rated value @ 400 V3 A
Rated value @ 500 V37 kW
Rated value @ 690 V18.6 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
3RT1044-1AD00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz42 V
3RT1044-1AD00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1044-1AD00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 125 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1044-1AD00 — 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 (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 standard mounting rail
Side-by-side mountingYes
3RT1044-1AD00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1044-1AD00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1044-1AD00 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth139 mm
3RT1044-1AD00 — Specifications
ParameterValue
At AC10 ... 19 ms

Product details

Siemens SIRIUS 3RT1044-1AD00 — Power Contactor, Size S3

Rated for AC-2 duty at 30 kW at 400 V and AC-4 at 55 A at 400 V, this contactor handles both standard motor starting and reversing/jogging applications. Typical mechanical life is 10,000,000 operations.

Fastens to 35 mm or 75 mm DIN rail with screw or snap-on method. Dimensions are 146 mm height, 70 mm width, and 139 mm depth — fits standard panel layouts with side-by-side mounting permitted. Main circuit accepts screw-type terminals: solid conductors 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²); stranded 2x (10–50 mm²); solid or stranded 2x (2.5–16 mm²). Terminal protection rating is IP00; front face with cover or box terminal is IP20.

Pollution degree 3 (industrial environment). RoHS compliance date marked 05/01/2012.

Frequently asked questions

Where can I buy 3RT1044-1AD00?

The 3RT1044-1AD00 is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.

What are the key power ratings for 3RT1044-1AD00?

Rated 37 kW at 500 V, 18.6 kW at 690 V, 30 kW at AC-2 400 V, and 55 A at AC-4 400 V. Coil switching capacity at 24 V is 10 A.

What is the physical size and mounting of 3RT1044-1AD00?

Dimensions are 146 x 70 x 139 mm (H x W x D). Mounts via screw or snap-on onto 35 mm or 75 mm DIN rail. Side-by-side mounting is permitted.

MPN
3RT1044-1AD00