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Siemens 3RT1044-1AR64 — Contactors

Siemens 3RT1044-1AR64 SIRIUS Power Contactor, 37 kW at 500 V

MPN3RT1044-1AR64

Siemens SIRIUS 3RT1044-1AR64 power contactor, size S3, 37 kW at 500 V, 50/60 Hz, screw-type terminals, IP20 front, snap-on 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

3RT1044-1AR64 — Identification
ParameterValue
Contactor frame sizeS3
3RT1044-1AR64 — 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
3RT1044-1AR64 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz400 V
3RT1044-1AR64 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1044-1AR64 — 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
3RT1044-1AR64 — 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
3RT1044-1AR64 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1044-1AR64 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1044-1AR64 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth188 mm
3RT1044-1AR64 — Specifications
ParameterValue
At AC10 ... 19 ms

Product details

SIRIUS Power Contactor, Size S3

The Siemens 3RT1044-1AR64 is a SIRIUS-brand power contactor in frame size S3, rated for motor loads up to 37 kW at 500 V and 18.6 kW at 690 V, 50/60 Hz.

Ratings and Duty Cycles

The AC-3 (motor) switching capacity is 1000 operations per hour maximum; AC-4 (inching/plugging) is limited to 300 operations per hour. The auxiliary contacts are rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V.

The contactor occupies a 70 mm width, 146 mm height, and 188 mm depth footprint. The screw-type terminals accept 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); and solid/stranded mixed: 2x (2.5…16 mm²).

Frequently asked questions

What is the depth of 3RT1044-1AR64?

The depth is 188 mm.

What solid conductor sizes does the 3RT1044-1AR64 accept?

It accepts 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), and max 2x (0.75…4 mm²) solid conductors.

Where can I buy 3RT1044-1AR64?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT1044-1AR64