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Siemens 3RT1075-2AR36 — Contactors

Siemens 3RT1075-2AR36 SIRIUS Power Contactor, Size S12, 440-

MPN3RT1075-2AR36
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Siemens SIRIUS power contactor, size S12, screw fixing, 440-480 V AC coil, spring-type terminals, auxiliary switch included.

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

Specifications

3RT1075-2AR36 — Identification
ParameterValue
Contactor frame sizeS12
3RT1075-2AR36 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V350 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
3RT1075-2AR36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.9
Rated value @ 50 Hz440 ... 480 V
3RT1075-2AR36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1075-2AR36 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 630 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 500 A (690 V, 100 kA), aM: 400 A (690 V, 50 kA), BS88: 450 A (415 V, 50 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT1075-2AR36 — Connection & Mounting
ParameterValue
Main circuit connectionConnection bar
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (0,25 ... 2,5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew fixing
Side-by-side mountingYes
3RT1075-2AR36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1075-2AR36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1075-2AR36 — Mechanical
ParameterValue
Width160 mm
Height214 mm
Depth225 mm
3RT1075-2AR36 — Specifications
ParameterValue
At AC60 ... 100 ms

Product details

It mounts via screw fixing to a vertical surface, with ±90° rotatability and ±22.5° tilt front-to-back, giving panel builders flexibility in tight enclosures. The magnet coil is rated 440-480 V AC and terminates on spring-type terminals — no screwdriver needed for the coil connection, which speeds up wiring on a panel assembly line. The main power circuit accepts stranded conductors from 70 to 240 mm²; the auxiliary circuit takes 2x (0.25 to 2.5 mm²) solid or stranded.

Switching frequency varies by duty class: 700 operations per hour in AC-1 (resistive loads), 500/h in AC-3 and AC-3e (squirrel-cage motors, starting and running), 200/h in AC-2 (slip-ring motors), and 130/h in AC-4 (plugging, inching, reversing). The AC-3e rating aligns with the newer IEC classification for motor switching; if your application calls for AC-3e, this contactor handles it at the same 500 ops/h as standard AC-3. Auxiliary contact ratings span the control-voltage range: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V. These figures matter for coordinating with upstream protection and for timing sequences in a motor control center.

Environmental limits and installation clearances

The depth of 225 mm, width of 160 mm, and height of 214 mm define the envelope for panel layout. A single 11 mm mounting hole is provided for screw fixing.

Frequently asked questions

What is the depth of the 3RT1075-2AR36?

The listed depth is 225 mm.

What solid conductor sizes does the auxiliary circuit accept?

The auxiliary circuit accepts 2x (0.25 to 2.5 mm²) solid or stranded conductors.

MPN
3RT1075-2AR36