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Siemens 3RT1055-6AF36 — Contactors

Siemens 3RT1055-6AF36 SIRIUS Power Contactor, 110-127 V AC C

MPN3RT1055-6AF36
Active

Siemens SIRIUS, power contactor, size S6, 3RT1055-6AF36, 110-127 V AC coil, screw-type terminals, 25-120 mm² stranded power connections.

$234.95Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1055-6AF36 — Identification
ParameterValue
Contactor frame sizeS6
3RT1055-6AF36 — 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
3RT1055-6AF36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.8
Rated value @ 50 Hz110 ... 127 V
3RT1055-6AF36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1055-6AF36 — 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)
3RT1055-6AF36 — 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
3RT1055-6AF36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1055-6AF36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1055-6AF36 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1055-6AF36 — Specifications
ParameterValue
At AC40 ... 60 ms

Product details

This one pulls a 110-127 V AC coil, so it's a straight swap into existing 120 V control transformers without a separate DC supply on the van. The power terminals accept stranded cable from 25 mm² up to 120 mm², which means it handles the fat feeder for a 50-75 kW motor depending on duty cycle. Mounting is screw-fix to a vertical surface, and the contactor body can be rotated ±90° or tilted ±22.5° front-to-back — useful when you're shoehorning it into a panel that wasn't laid out for this frame. Clearance requirements are modest: 10 mm upward, 20 mm forward, 10 mm to the side, 10 mm downward.

Coil and auxiliary realities

The magnet coil uses screw-type terminals — no push-in or spring-cage on this variant. That's typical for this frame size — fast enough for most motor starts, but if you're sequencing contactors in a reversing or star-delta scheme, account for the full 60 ms before the next transition.

Switching frequency and duty

Rated switching frequency varies by duty class: 800 operations per hour at AC-1 (resistive loads), 750/h at AC-3 (squirrel-cage motors, starting and disconnecting running), 300/h at AC-2 (slip-ring motors), and 130/h at AC-4 (plugging, inching, reversing). The AC-3e rating also sits at 750/h. For a conveyor or pump running a standard start/stop cycle, the AC-3 750/h limit gives you about one start every 4.8 seconds — plenty for process work.

Environmental and storage

That covers unheated warehouses and most plant-floor conditions.

Frequently asked questions

What is the coil voltage on 3RT1055-6AF36?

The rated coil voltage is 110-127 V AC. Pick-up is at 0.8x rated value, drop-out at 0.8x as well, with a full-scale tolerance of 1.1x.

Will 3RT1055-6AF36 drop into a panel built for 3RT1055-6QF35?

Yes, same frame size S6, same mounting footprint, same power terminal range. The only difference is the coil voltage — the 6AF36 is 110-127 V AC versus the 6QF35's different coil rating. No rewiring of the power circuit needed, but verify the control transformer secondary matches.

What are the key dimensions for panel layout?

Height 172 mm, width 120 mm, depth 170 mm. Clearances: 10 mm upward, 10 mm downward, 10 mm to the side, 20 mm forward.

How do I get current pricing and availability for 3RT1055-6AF36?

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

MPN
3RT1055-6AF36