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Siemens 3RT1055-2AP36 — Contactors

Siemens 3RT1055-2AP36 SIRIUS Power Contactor, S6 Frame, 220-

MPN3RT1055-2AP36
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Siemens SIRIUS power contactor, size S6, 3RT1055-2AP36, 220-240 V AC coil, spring-type terminals, depth 170 mm, width 120 mm, height 172 mm.

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

Specifications

3RT1055-2AP36 — Identification
ParameterValue
Contactor frame sizeS6
3RT1055-2AP36 — 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
3RT1055-2AP36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz220 ... 240 V
3RT1055-2AP36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1055-2AP36 — 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)
3RT1055-2AP36 — 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
3RT1055-2AP36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1055-2AP36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1055-2AP36 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1055-2AP36 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

The 220-240 V AC coil is the primary fit gate — if your control voltage lands in that band, this contactor pulls in reliably. For the main power circuit, it accepts stranded cable from 25 mm² up to 120 mm², which covers the range for a 50-100 A motor branch on a 400 V system. The auxiliary contact ratings tell you what you can switch on the control side: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V (–,). That means a 24 VDC PLC output driving a relay or pilot light is fine; at 110 VAC the contact is limited to 1 A, so don't hang a heavy solenoid bank off it without checking the inrush. Switching rates vary by duty class: 800 cycles/hour for resistive (AC-1), 750 for motor running (AC-3/AC-3e), 300 for slip-ring motor start (AC-2), and 130 for plugging/reversing (AC-4). If your application does frequent jogging or reversing, the AC-4 limit of 130 ops/hour is the real constraint — the contactor will thermally survive that, but don't try to run it at AC-1 speeds in a reversing duty. The clearance distances — 10 mm upwards/downwards/sideways, 20 mm forwards — are the minimum air gaps to maintain around the contactor for arc flash and heat dissipation; don't cram it against the gland plate.

Dimensions are 172 mm high, 120 mm wide, 170 mm deep. That's the S6 frame envelope — allow the clearance zones above and you can fit it on a standard DIN-mounting plate or backpanel. The screw-fixing method means four M6 or M8 bolts through the mounting holes (9 mm diameter, single hole per corner,). Solid or stranded control wiring is 2x 0.25–2.5 mm², which is standard for a 1.5 mm² control cable.

Frequently asked questions

Where can I buy the 3RT1055-2AP36?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time.

What is the closest functional second-source to the 3RT1055-2AP36?

The 3RT1055-6QF35 is the closest functional peer — same S6 frame size and SIRIUS series, but with a different coil voltage. The 3RT1055-2AP36 uses a 220-240 V AC coil; the -6QF35 uses a different coil voltage. Verify coil compatibility before swapping into a panel specified around the -6QF35.

What compliance documentation does Siemens provide for the 3RT1055-2AP36?

As a standard SIRIUS power contactor, it carries CE marking and is designed to meet IEC/EN 60947-4-1. Documentation typically includes a declaration of conformity and a datasheet with rated operational currents per utilization category.

MPN
3RT1055-2AP36