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Siemens 3RT1075-6SP36 — Contactors

Siemens 3RT1075-6SP36 SIRIUS Power Contactor, Size S12, 200-

MPN3RT1075-6SP36
Active

Siemens SIRIUS power contactor, order code 3RT1075-6SP36, Size S12, rated coil 200-277 V, screw fixing, MTBF 75 a.

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

Specifications

3RT1075-6SP36 — Identification
ParameterValue
Contactor frame sizeS12
3RT1075-6SP36 — 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
3RT1075-6SP36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.4
Rated value @ 50 Hz200 ... 277 V
3RT1075-6SP36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1075-6SP36 — 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)
3RT1075-6SP36 — Connection & Mounting
ParameterValue
Main circuit connectionConnection bar
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew fixing
Side-by-side mountingYes
3RT1075-6SP36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1075-6SP36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1075-6SP36 — Mechanical
ParameterValue
Width160 mm
Height214 mm
Depth225 mm
3RT1075-6SP36 — Specifications
ParameterValue
At AC115 ... 130 ms

Product details

It carries a rated coil voltage of 200 to 277 V AC/DC, so it's a straight fit for common 240 V control circuits — no transformer needed on a 230/240 V supply. The coil terminals are screw-type, and the main power terminals accept stranded cable from 70 mm² up to 240 mm², which tells you this is sized for high-current feeders, not small aux circuits.

The MTBF of 75 a is the mean time between failures — not a warranty, but a reliability benchmark. For a contactor this size, that figure says the coil and main contacts are designed for long service in a clean, well-ventilated enclosure.

This contactor mounts with screw fixing — not DIN-rail snap-on, so budget for a backplate or mounting rail with tapped holes. That's tight for a part that's 214 mm tall, 160 mm wide, and 225 mm deep — make sure your enclosure depth clears the 225 mm plus wiring space for 240 mm² cables.

Coil and auxiliary details

The coil's rated value at 24 V is 10 A, at 48 V it's 2 A, and at 60 V it's 2 A — these are the switching currents for the auxiliary contacts, not the main power path. The main power switching is rated for AC-1, AC-2, AC-3, and AC-4 duty cycles up to 200 operations per hour, with AC-4 (the toughest — plugging and inching) limited to 130 ops/h. That's real-world: a motor starter doing frequent reversals needs the lower AC-4 rate.

Frequently asked questions

What is the MTBF of 3RT1075-6SP36?

The listed MTBF is 75 a — a reliability benchmark for the contactor in normal service conditions.

What is the depth of 3RT1075-6SP36?

The depth is 225 mm, which must be cleared inside the enclosure plus wiring space for 240 mm² cables.

Will 3RT1075-6SP36 drop into a panel specified around 3RT1264-6AP36-0KA1?

No — the 3RT1075-6SP36 is a Size S12 contactor with a 200-277 V coil, while the 3RT1264-6AP36-0KA1 is a different frame and coil voltage. Mounting holes, cable lugs, and control wiring would all need to be reworked.

Where can I buy 3RT1075-6SP36?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT1075-6SP36