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Siemens 3RT1075-2AT36 SIRIUS Power Contactor, S12 Frame, 575

MPN3RT1075-2AT36

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Siemens SIRIUS power contactor, size S12, 3RT1075-2AT36, screw fixing, spring-type coil terminals, 575-600 V rated insulation voltage.

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Siemens 3RT1075-2AT36 datasheet (PDF)

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

Specifications

3RT1075-2AT36 — Identification
Parameter	Value
Contactor frame size	S12

3RT1075-2AT36 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated operational current, AC-4 @ 400 V	350 A
Rated value @ 400 V	3 A
Rated value @ 500 V	2 A
Rated value @ 690 V	1 A
Rated value @ 230 V	6 A
Rated value @ 24 V	10 A
Rated value @ 60 V	2 A
Rated value @ 110 V	1 A
Rated value @ 220 V	0.3 A

3RT1075-2AT36 — Control & Coil
Parameter	Value
Control supply voltage type	AC/DC
Rated value @ 50 Hz	0.9
Rated value @ 50 Hz	575 ... 600 V

3RT1075-2AT36 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RT1075-2AT36 — Protection & Coordination
Parameter	Value
Short-circuit coordination type 1, fuse	gG: 630 A (690 V, 100 kA)
Short-circuit coordination type 2, fuse	gG: 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, fuse	gG: 10 A (500 V, 1 kA)

3RT1075-2AT36 — Connection & Mounting
Parameter	Value
Main circuit connection	Connection bar
Aux. / control circuit connection	spring-loaded terminals
Conductor cross-section, solid	2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded	2x (0,25 ... 2,5 mm²)
Conductor cross-section, finely stranded w/ ferrule	2x (0.25 ... 1.5 mm²)
Mounting method	screw fixing
Side-by-side mounting	Yes

3RT1075-2AT36 — Durability
Parameter	Value
Durability (operating cycles, typ.)	10 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT1075-2AT36 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT1075-2AT36 — Mechanical
Parameter	Value
Width	160 mm
Height	214 mm
Depth	225 mm

3RT1075-2AT36 — Specifications
Parameter	Value
At AC	60 ... 100 ms

Product details

SIRIUS S12 power contactor — panel fit and duty

Rated insulation voltage sits at 575 to 600 V, and the main poles accept stranded conductors from 70 up to 240 mm² — sized for motor and resistive loads in a control panel.

Switching frequency and auxiliary contact ratings

Duty-cycle limits: 700 operations per hour at AC-1 (resistive), 500/h at AC-3 and AC-3e (motor starting), 200/h at AC-2, and 130/h at AC-4 (plugging/inching). These are the maximum mechanical switching rates; thermal derating applies above 40 °C ambient. The auxiliary switch is rated 10 A at 24 V, 2 A at 48 V and 60 V, and 1 A at 110 V — sufficient for signaling to a PLC input or relay interposing.

Frequently asked questions

What compliance documentation does this brand provide for 3RT1075-2AT36?

As a Siemens SIRIUS product, standard documentation includes RoHS and REACH declarations; UL and IEC certifications are typically available on request through the manufacturer's support portal.