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Siemens 3RT1044-1AF00-1AA0 — Contactors

Siemens 3RT1044-1AF00-1AA0 SIRIUS Power Contactor, S3 Size,

MPN3RT1044-1AF00-1AA0

Siemens SIRIUS power contactor, size S3, 3RT1044-1AF00-1AA0, 50 Hz rated, screw-type terminals, IP20 front / IP00 terminal, 146 x 70 x 139 mm.

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

3RT1044-1AF00-1AA0 — Identification
ParameterValue
Contactor frame sizeS3
3RT1044-1AF00-1AA0 — 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
3RT1044-1AF00-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz110 V
3RT1044-1AF00-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1044-1AF00-1AA0 — 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
3RT1044-1AF00-1AA0 — 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 (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
3RT1044-1AF00-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1044-1AF00-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1044-1AF00-1AA0 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth139 mm
3RT1044-1AF00-1AA0 — Specifications
ParameterValue
At AC10 ... 19 ms

Product details

Siemens SIRIUS 3RT1044-1AF00-1AA0 — S3 Power Contactor, 50 Hz, Screw Terminals

It carries a 37 kW rating at 500 V under AC-3 duty, and 30 kW at 400 V under AC-2 — the AC-3 figure governs motor starting and running, so size the contactor to the motor's full-load current, not the resistive AC-1 number.

Duty Ratings and Switching Life

Electrical switching frequency varies by duty: 1,000 operations per hour under AC-1 (resistive) and AC-3 (motor), 400 under AC-2, and 300 under AC-4 (plugging/inching). Arcing time spans 10 to 19 ms at AC, with a typical arc duration of 10 to 15 ms. The contactor operates across -25 to +60 °C ambient and stores from -55 to +80 °C.

Frequently asked questions

What are the key ratings for 3RT1044-1AF00-1AA0?

Rated 37 kW at 500 V AC-3 and 30 kW at 400 V AC-2. AC-4 switching capacity is 55 A at 400 V. Mechanical life is 10 million cycles typical. Screw terminals accept solid up to 2x 4 mm² and stranded up to 2x 50 mm².

What compliance documentation is available for this contactor?

RoHS compliance is documented with a substance prohibitance date of May 1, 2012. The contactor carries pollution degree 3 rating per IEC standards. Full compliance documentation is provided with the unit.

Where can I buy 3RT1044-1AF00-1AA0 and get current pricing?

Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer.

What is the physical size of this contactor?

Dimensions are 146 mm height, 70 mm width, and 139 mm depth. It mounts on 35 mm or 75 mm standard DIN rail via screw or snap-on, and side-by-side mounting is allowed.

MPN
3RT1044-1AF00-1AA0