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Siemens 3RT1056-6AT36-0UA0 — Contactors

Siemens 3RT1056-6AT36-0UA0 SIRIUS Power Contactor, Size S6,

MPN3RT1056-6AT36-0UA0
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Siemens SIRIUS 3RT1056-6AT36-0UA0 power contactor, size S6, rated 575-600 V AC, screw-type coil terminals, auxiliary switch included, current production.

Siemens 3RT1056-6AT36-0UA0 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT1056-6AT36-0UA0 — Identification
ParameterValue
Contactor frame sizeS6
3RT1056-6AT36-0UA0 — 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 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1056-6AT36-0UA0 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz575 ... 600 V
3RT1056-6AT36-0UA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1056-6AT36-0UA0 — 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)
3RT1056-6AT36-0UA0 — 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
3RT1056-6AT36-0UA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1056-6AT36-0UA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1056-6AT36-0UA0 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1056-6AT36-0UA0 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

The 3RT1056-6AT36-0UA0: Mounting is by screw fixing through a single 9 mm hole, with the contactor body sized at 172 mm high by 120 mm wide by 170 mm deep. The coil connection uses screw-type terminals, and the auxiliary switch is integrated, so no separate add-on block is needed for basic status feedback.

Duty-cycle and operating life

Electrical life depends on duty: AC-1 (resistive loads) allows up to 800 operations per hour, AC-3 (squirrel-cage motors, starting only) allows 750 ops/h, AC-2 (slip-ring motors) drops to 300 ops/h, and AC-4 (plugging/inching) is the hardest at 130 ops/h. The AC-3e rating also sits at 750 ops/h, matching the standard AC-3 figure.

Environmental and auxiliary ratings

The auxiliary contacts are rated for 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V, which covers typical PLC input or relay coil loads in the control circuit.

Frequently asked questions

Where can I buy 3RT1056-6AT36-0UA0?

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

What wire sizes does 3RT1056-6AT36-0UA0 accept on the power circuit?

The power terminals accept stranded conductors from 25 to 120 mm². The coil and auxiliary terminals accept solid or stranded wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²).

What are the mounting clearances required for this contactor?

Minimum clearances: 10 mm upward, 10 mm downward, 10 mm at the sides, and 20 mm forward. Mounting is via screw fixing through a single 9 mm hole.

Does 3RT1056-6AT36-0UA0 include an auxiliary switch?

Yes, an auxiliary switch is integrated into the contactor. No separate add-on block is required for basic status feedback.

MPN
3RT1056-6AT36-0UA0