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Siemens 3RT2446-1AL20 — Contactors

Siemens 3RT2446-1AL20 SIRIUS Contactor, S3, 70 mm wide, 152

MPN3RT2446-1AL20
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Siemens SIRIUS 3RT2446-1AL20, size S3 contactor, screw-type coil terminals, screw and snap-on mounting on 35 mm DIN rail, 70 mm width, 152 mm depth.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2446-1AL20 — Identification
ParameterValue
Contactor frame sizeS3
3RT2446-1AL20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
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
3RT2446-1AL20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.35
Rated value @ 50 Hz230 V
3RT2446-1AL20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2446-1AL20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V,100 kA)
Short-circuit coordination type 2, fusegR: 250 A (690 V, 100 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2446-1AL20 — Connection & Mounting
ParameterValue
Main circuit connectionbox terminal
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2446-1AL20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2446-1AL20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2446-1AL20 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm
3RT2446-1AL20 — Specifications
ParameterValue
At AC10 ... 21 ms

Product details

It measures 140 mm high, 70 mm wide, and 152 mm deep — a compact footprint for a size S3 frame, leaving room for auxiliary contact blocks (two attachable) and wiring clearance of 10 mm upwards, 10 mm downwards, 20 mm forwards, and 10 mm at the side. The main power terminals accept stranded conductors from 6 mm² up to 70 mm², while the coil and auxiliary terminals handle solid or stranded wire from 0.5 mm² to 2.5 mm².

Rated operational current for AC-1 duty at 690 V is 1 A; at 400 V it is 3 A; at 230 V it is 6 A — these are the resistive-load curves. For inductive loads at lower voltages, the contactor is rated 10 A at 24 V, 2 A at 48 V, and 2 A at 60 V. Coil draws 0.35 A at 50 Hz and 0.41 A at 60 Hz, both at 230 V — a standard AC coil draw that fits typical control transformer sizing.

Frequently asked questions

What is 3RT2446-1AL20's listed depth (152 mm) on this component line?

The depth is 152 mm, with a width of 70 mm and height of 140 mm.

What is 3RT2446-1AL20's listed solid wire range (2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²))?

The solid wire range for auxiliary/coil terminals is 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²).

MPN
3RT2446-1AL20