Skip to main content
Log in
Siemens 3RT1056-6AS36 — Contactors

Siemens 3RT1056-6AS36 SIRIUS Power Contactor, S6, 120 mm

MPN3RT1056-6AS36
Active

Siemens SIRIUS, power contactor, 3RT1056-6AS36, size S6, 172 x 120 x 170 mm, screw fixing, main terminals 25-120 mm² stranded, auxiliary switch included.

Siemens 3RT1056-6AS36 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1056-6AS36 — Identification
ParameterValue
Contactor frame sizeS6
3RT1056-6AS36 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V160 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V30 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1056-6AS36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz500 ... 550 V
3RT1056-6AS36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1056-6AS36 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 355 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 315 A (690 V, 100 kA), aM: 200 A (690 V, 50 kA), BS88: 315 A (415 V, 50 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT1056-6AS36 — 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
3RT1056-6AS36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1056-6AS36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1056-6AS36 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1056-6AS36 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

Integrator's first look

Screw fixing to a vertical mounting surface — the enclosure can be rotated ±90° or tilted ±22.5° front-to-back without derating the contactor's thermal capacity. Main power terminals accept 25 to 120 mm² stranded copper, so the lugging matches cable sizes typical of 100 A+ motor feeders. The coil terminals are also screw-type, which means a standard Pozidriv or flathead on the panel floor — no special tooling needed.

Duty-cycle and switching capability

At AC-3 (squirrel-cage motor starting), the contactor is good for 750 cycles per hour; at AC-4 (plugging or inching), that drops to 130 cycles per hour. The arcing time sits between 10 and 15 ms, and the opening delay for both AC and DC coils is 40 to 60 ms — consistent timing for coordinated starter assemblies. The auxiliary contact block is integrated, rated 10 A at 24 V, 2 A at 48 V or 60 V, and 1 A at 110 V.

Clearance and panel integration

The contactor is 170 mm deep. Mounting is via a single 9 mm hole with screw fixing.

Frequently asked questions

What is the overall depth of this contactor?

170 mm from the mounting surface to the front of the arc chamber.

What wire sizes do the main and auxiliary terminals accept?

Main power terminals accept 25 to 120 mm² stranded copper. Auxiliary terminals accept 2x 0.5 to 1.5 mm² solid or 2x 0.75 to 2.5 mm² stranded, with a maximum of 2x 0.75 to 4 mm².

Will 3RT1056-6AS36 drop into a panel wired for 3RT1056-6AF36-0UA0?

Physically yes — same S6 frame, same screw-fixing hole pattern, same terminal ranges. The only difference is the coil; the 6AS36 uses a 500-550 V coil. If the control circuit in the panel is wired for a different coil voltage, the contactor will not pick up. Check the existing coil rating on the 6AF36 before swapping.

MPN
3RT1056-6AS36