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Siemens 3RT1044-3AF04-ZX95 — Contactors

Siemens 3RT1044-3AF04-ZX95 SIRIUS Power Contactor, 30 kW AC-

MPN3RT1044-3AF04-ZX95

Siemens SIRIUS 3RT1044-3AF04-ZX95 power contactor, size S3, screw-type terminals, 30 kW at 400 V AC-2, 55 A at 400 V AC-4, 37 kW at 500 V AC-3, IP20 front protection.

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

3RT1044-3AF04-ZX95 — Identification
ParameterValue
Contactor frame sizeS3
3RT1044-3AF04-ZX95 — 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
3RT1044-3AF04-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz110 V
3RT1044-3AF04-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1044-3AF04-ZX95 — 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
3RT1044-3AF04-ZX95 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (2.5 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm and 75 mm standard mounting rail
Side-by-side mountingYes
3RT1044-3AF04-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1044-3AF04-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1044-3AF04-ZX95 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth188 mm
3RT1044-3AF04-ZX95 — Specifications
ParameterValue
At AC10 ... 19 ms

Product details

It's rated for 30 kW at 400 V in AC-2 duty (slip-ring motors, moderate inrush), and 37 kW at 500 V in AC-3 duty (standard squirrel-cage motors). The AC-4 rating of 55 A at 400 V covers reversing and inching applications with high electrical stress on the contacts.

Wiring and terminations

Main current circuit uses screw-type terminals. Solid conductors accept 2x (0.25 to 2.5 mm²) for control wiring, while stranded power cables take 2x (10 to 50 mm²). The auxiliary contacts (not detailed here) share the same terminal style, so keep a common screwdriver bit on the panel.

RoHS compliance date is noted as May 1, 2012, covering the EU directive.

Frequently asked questions

What are the key motor ratings for this contactor?

AC-2 at 400 V: 30 kW. AC-3 at 500 V: 37 kW. AC-3 at 690 V: 18.6 kW. AC-4 at 400 V: 55 A.

What is the physical size and mounting?

Size S3, 146 mm high, 70 mm wide, 188 mm deep. Mounts on 35 mm or 75 mm DIN rail via screw or snap-on.

What compliance documentation is available?

RoHS compliance is documented with a substance prohibitance date of May 1, 2012.

MPN
3RT1044-3AF04-ZX95