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Siemens 3RT1056-1AB36 — Contactors

Siemens 3RT1056-1AB36 SIRIUS Power Contactor, 23-26 VDC Coil

MPN3RT1056-1AB36
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Siemens SIRIUS power contactor, type 3RT1056-1AB36, size S6, 23-26 VDC coil with screw-type terminals, auxiliary switch included.

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

Specifications

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

Product details

It carries an integrated auxiliary switch, so you don't need to add a separate block for basic feedback or status signaling. Mounting is screw-fix to a vertical surface — no DIN rail, so plan for panel drilling.

The coil holds at 23–26 VDC; the pickup and dropout timing is 40–60 ms for both AC and DC, so it's predictable for sequencing logic. Switching frequency varies by duty: AC-1 (resistive) max 800 ops/h, AC-3 (motor starting) max 750 ops/h, AC-4 (plugging/inching) max 130 ops/h.

Wiring and connections

Main power terminals accept stranded 16–70 mm² — that's substantial cable, sized for the S6 frame's current capacity. Control wiring (coil and aux) takes solid or stranded 0.5–4 mm², with dual-entry options for looping through. Auxiliary contact ratings are given at various voltages: 10 A at 24 V, 2 A at 48/60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V. That covers standard control voltages — just match the load side to the right column.

MPN
3RT1056-1AB36