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Siemens 3RT1056-6AD36 — Contactors

Siemens 3RT1056-6AD36 SIRIUS Power Contactor, Size S6, 42-48

MPN3RT1056-6AD36
Active

Siemens SIRIUS power contactor, 3RT1056-6AD36, Size S6, 42-48 V coil, screw-type terminals, auxiliary switch, 170 x 120 x 172 mm.

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

Specifications

3RT1056-6AD36 — Identification
ParameterValue
Contactor frame sizeS6
3RT1056-6AD36 — 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
3RT1056-6AD36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz42 ... 48 V
3RT1056-6AD36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1056-6AD36 — 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)
3RT1056-6AD36 — 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
3RT1056-6AD36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1056-6AD36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1056-6AD36 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1056-6AD36 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

The main poles accept stranded conductors from 25 to 120 mm², so it lands squarely in heavy motor-switching duty — conveyors, pumps, compressors, anything pulling full-load current in the S6 range.

The built-in auxiliary switch is rated for 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V. At 48 V, the 2 A figure is typical for a small contactor or indicator load; if you need to drive a heavier solenoid bank at that voltage, you'd want to check the inrush against that 2 A limit.

Thermal environment and mounting clearances

The enclosure needs at least 10 mm clearance upwards, downwards, and at the sides, plus 20 mm forward — tight enough for a standard 600 mm deep panel, but watch the forward clearance if you're mounting a busbar or shield plate close. Dimensions are 170 mm deep, 120 mm wide, 172 mm high.

Frequently asked questions

Who supplies 3RT1056-6AD36 and how is it quoted?

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

What is the closest functional second-source for 3RT1056-6AD36?

The peer 3RT1055-6QF35 is a smaller Size S5 frame, so it will not drop into the same footprint without panel modifications — the S6 frame (3RT1056-6AD36) has larger main-pole terminals (25-120 mm² vs. the S5 range) and different mounting hole spacing. For a true functional equivalent, stay within the S6 frame.

What compliance documentation does Siemens provide for 3RT1056-6AD36?

As a SIRIUS series component, Siemens typically provides RoHS and REACH declarations, plus UL, CSA, and IEC certifications for the contactor family. Specific document numbers are confirmed at quote time.

MPN
3RT1056-6AD36