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Siemens 3RT1056-2AV36 — Contactors

Siemens 3RT1056-2AV36 SIRIUS Power Contactor, S6, 380-420V C

MPN3RT1056-2AV36
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Siemens SIRIUS S6 power contactor, 3RT1056-2AV36, 380-420 V AC coil, spring-type coil terminals, screw fixing, 170 x 120 x 172 mm.

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

Specifications

3RT1056-2AV36 — Identification
ParameterValue
Contactor frame sizeS6
3RT1056-2AV36 — 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
3RT1056-2AV36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz380 ... 420 V
3RT1056-2AV36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1056-2AV36 — 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)
3RT1056-2AV36 — 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
3RT1056-2AV36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1056-2AV36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1056-2AV36 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1056-2AV36 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

Mounting and Wiring — What the Panel Guy Needs

Mounts via screw fixing on a vertical surface; you can rotate it ±90° or tilt it ±22.5° forward/back, which gives you some flexibility in a crowded enclosure. Clearance: 10 mm up, down, and sideways; 20 mm forward for the arc chute. Main power terminals accept stranded wire from 25 to 120 mm² — that's a serious lug range, sized for the S6 frame's full rated current. The coil connection uses spring-type terminals that take 2x (0.25–2.5 mm²) solid or stranded, so you can daisy-chain the control supply without ring tongues.

Duty Cycles and Contact Life — Real-World Pacing

Switching frequency depends on the duty: AC-1 (resistive loads) lets you run 800 operations per hour; AC-3 (squirrel-cage motors, starting and running) is 750 ops/h; AC-2 (slip-ring motors) drops to 300; AC-4 (plugging, inching) is the hardest at 130 ops/h. The AC-3e rating matches the standard AC-3 at 750 ops/h, so no penalty for the 'e' classification. Arc time per break is 10–15 ms, and the power factor at 50/60 Hz is 0.8, which is what you'd expect for a motor load.

Auxiliary Contacts and Temperature Range

Built-in auxiliary switch is present, rated 10 A at 24 V, 2 A at 48 V and 60 V, and 1 A at 110 V. Those numbers matter for the control circuit design — 24 V pilot duty is the strongest leg. If your panel sits in a non-conditioned mill or yard, the -25 °C floor is fine for most climates, but the +60 °C ceiling inside a sealed cabinet near a furnace or compressor needs a derate check.

Frequently asked questions

Where can I buy 3RT1056-2AV36 and how do I get a price?

This part is available to order. Submit an RFQ through our site; availability and current pricing are confirmed at quote time through our independent distribution network.

What is 3RT1056-2AV36's listed depth?

The depth is 170 mm, with a width of 120 mm and height of 172 mm.

What wire sizes does the main power terminal accept?

The main power terminals accept stranded wire from 25 to 120 mm². The coil terminals use spring-clamp connections for 2x (0.25–2.5 mm²) solid or stranded.

Will 3RT1056-2AV36 drop into a panel specified around 3RT1055-6QF35?

Both are SIRIUS S6 contactors with the same frame size, so the mounting footprint and main power lug range are the same. The 3RT1055-6QF35 has a different coil voltage; verify your control supply matches the 380–420 V AC coil on the 3RT1056-2AV36 before swapping.

What compliance documentation does Siemens provide for 3RT1056-2AV36?

As a standard Siemens SIRIUS product, it carries CE marking for the European market and is manufactured under ISO 9001. Specific UL/CSA, RoHS, and REACH declarations are available in the Siemens Industry Online Support documentation for this order code.

MPN
3RT1056-2AV36