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Siemens 3RT1055-2AT36 — Contactors

Siemens 3RT1055-2AT36 SIRIUS Power Contactor, S6 Frame, 575-

MPN3RT1055-2AT36
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Siemens SIRIUS power contactor, S6 frame size, 3RT1055-2AT36, 575-600 V AC coil, spring-type terminals, rated for motor switching up to AC-3 duty, current production.

Siemens 3RT1055-2AT36 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1055-2AT36 — Identification
ParameterValue
Contactor frame sizeS6
3RT1055-2AT36 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V132 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
3RT1055-2AT36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz575 ... 600 V
3RT1055-2AT36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1055-2AT36 — 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)
3RT1055-2AT36 — 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
3RT1055-2AT36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1055-2AT36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1055-2AT36 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1055-2AT36 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

Siemens 3RT1055-2AT36 — SIRIUS Power Contactor, S6 Frame

It carries a 575 to 600 V rated coil voltage and uses spring-type terminals for the magnet coil connection, with the main power circuit accepting stranded conductors from 25 to 120 mm². This contactor is rated for AC-1 (resistive) switching at up to 800 operations per hour, AC-3 (motor starting) at up to 750 operations per hour, and AC-4 (plugging/inching) at up to 130 operations per hour. The AC-3e rating matches the AC-3 maximum at 750 operations per hour. Mechanical life is typical 10,000,000 operations.

Wiring and Integration

The main power circuit accepts stranded conductors from 25 to 120 mm². The auxiliary circuit uses spring-type terminals accepting solid or stranded conductors of 2x (0.25 to 2.5 mm²). An auxiliary switch is included on the contactor. Dimensions are 172 mm height, 120 mm width, and 170 mm depth.

Frequently asked questions

What is the 3RT1055-2AT36's depth?

The depth is 170 mm. Overall dimensions are 172 mm height, 120 mm width, and 170 mm depth.

What wire sizes does the 3RT1055-2AT36 accept?

Main power terminals accept stranded conductors from 25 to 120 mm². Auxiliary spring terminals accept solid or stranded 2x (0.25 to 2.5 mm²).

Where can I buy the 3RT1055-2AT36?

This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.

MPN
3RT1055-2AT36