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Siemens 3RT1056-6AB36-0UA0 — Contactors

Siemens 3RT1056-6AB36-0UA0 SIRIUS Power Contactor, Size S6,

MPN3RT1056-6AB36-0UA0
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Siemens SIRIUS 3RT1056-6AB36-0UA0 power contactor, Size S6, screw-type terminals, 23-26 VDC coil, 170 mm depth, 120 mm width, 172 mm height.

$293.37Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1056-6AB36-0UA0 — Identification
ParameterValue
Contactor frame sizeS6
3RT1056-6AB36-0UA0 — 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
3RT1056-6AB36-0UA0 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz23 ... 26 V
3RT1056-6AB36-0UA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1056-6AB36-0UA0 — 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)
3RT1056-6AB36-0UA0 — 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
3RT1056-6AB36-0UA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1056-6AB36-0UA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1056-6AB36-0UA0 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1056-6AB36-0UA0 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

Part Identity and Fit

It measures 172 mm high by 120 mm wide by 170 mm deep and mounts via screw fixing to a vertical surface, rotatable ±90° or tiltable ±22.5° front-to-back. The main power circuit accepts stranded conductors from 25 to 120 mm². Auxiliary control wiring uses solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²).

Ratings and Operating Limits

Switching frequency varies by duty: AC-1 resistive loads up to 800 operations per hour, AC-3 motor loads up to 750 ops/h, AC-2 up to 300 ops/h, and AC-4 (plugging/inching) up to 130 ops/h. The AC-3e rating also caps at 750 ops/h. Arcing time is 10-15 ms, with AC and DC opening times both 40-60 ms. The auxiliary switch contact ratings: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V. Coil operating range is 23-26 V, with a pickup ratio of 0.8 at both 50 and 60 Hz and a dropout ratio of 0.8. The thermal full-scale value is 1.1.

Mounts via screw fixing to a vertical panel surface. The Size S6 frame (172x120x170 mm) fits standard industrial panel layouts with the clearance margins noted above. Main power terminals accept stranded cable up to 120 mm²; auxiliary terminals handle smaller solid or stranded wires per the listed combinations. The screw-type coil terminals simplify field wiring compared to cage-clamp variants.

Frequently asked questions

What are the key dimensions and mounting requirements?

Height 172 mm, width 120 mm, depth 170 mm. Mounts via screw fixing to a vertical surface with ±90° rotation and ±22.5° tilt. Requires minimum clearances of 10 mm up/down/sides and 20 mm forward.

What wire sizes does the main power circuit accept?

Stranded conductors from 25 to 120 mm². Auxiliary terminals accept solid or stranded: 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), or max 2x (0.75-4 mm²).

What is the coil voltage and auxiliary contact rating?

Coil rated 23-26 VDC with screw-type terminals. Auxiliary switch contacts: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V.

What switching frequencies can this contactor handle?

AC-1: 800 ops/h, AC-3: 750 ops/h, AC-2: 300 ops/h, AC-4: 130 ops/h. AC-3e also 750 ops/h. Arcing time 10-15 ms; opening time 40-60 ms for both AC and DC.

MPN
3RT1056-6AB36-0UA0