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Siemens 3RT5044-1AL20 — Contactors

3RT5044-1AL20

MPN3RT5044-1AL20

Contactor AC 230 V 50/60 HZ AC3 30 kW 400 V 3-pole, size S3 screw terminal

Siemens 3RT5044-1AL20 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT5044-1AL20 — Identification
ParameterValue
Contactor frame sizeS3
3RT5044-1AL20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V18.6 kW
Rated value @ 230 V6 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT5044-1AL20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.27
Rated value @ 50 Hz230 V
3RT5044-1AL20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT5044-1AL20 — 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
3RT5044-1AL20 — 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
3RT5044-1AL20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT5044-1AL20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT5044-1AL20 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth139 mm
3RT5044-1AL20 — Specifications
ParameterValue
At AC5 000 1/h
MPN
3RT5044-1AL20