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Siemens 3RT1056-2NF36 — Contactors

Siemens 3RT1056-2NF36 SIRIUS Power Contactor, Size S6, 96-12

MPN3RT1056-2NF36
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Siemens SIRIUS power contactor, Size S6, 3RT1056-2NF36, 96-127 V AC/DC coil, screw fixing, spring-type coil terminals.

$335.28Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1056-2NF36 — Identification
ParameterValue
Contactor frame sizeS6
3RT1056-2NF36 — 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
3RT1056-2NF36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.6
Rated value @ 50 Hz96 ... 127 V
3RT1056-2NF36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1056-2NF36 — 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)
3RT1056-2NF36 — 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
3RT1056-2NF36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1056-2NF36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1056-2NF36 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm
3RT1056-2NF36 — Specifications
ParameterValue
At AC80 ... 90 ms

Product details

It mounts via screw fixing to a vertical surface, with ±90° rotatability and ±22.5° tilt front-to-back, giving flexibility in tight enclosures. The coil is rated 96-127 V AC/DC, with a pickup threshold of 0.8 x rated value and a dropout of 0.6 x rated value at both 50 and 60 Hz. Coil terminals are spring-type, so no screwdriver is needed for the control wiring — strip, push, done. Main power lugs accept 25-120 mm² stranded copper. Auxiliary terminals take 2x 0.25-2.5 mm² solid or stranded. The auxiliary switch is built in, rated 10 A at 24 V, 2 A at 48/60 V, and 1 A at 110 V — enough for PLC inputs or indicator lamps on the same contactor.

Operate time is 80-90 ms on both AC and DC pickup; arcing time runs 10-15 ms. That means the contactor closes and opens predictably for coordination with upstream breakers or soft-starters. Maximum switching frequency depends on the duty category: 800 cycles/hour in AC-1 (resistive), 750 in AC-3 and AC-3e (motor starting/running), 300 in AC-2 (slip-ring motors), and 130 in AC-4 (plugging/inching). For a conveyor running AC-3 duty at 750 ops/h, that's one start every ~4.8 seconds — well within the contactor's mechanical life of 10 million operations.

Minimum clearances around the contactor: 10 mm upwards, downwards, and sideways; 20 mm forwards. The 172 mm height, 120 mm width, and 170 mm depth fit a standard Size S6 footprint — measure your backplate before committing.

Frequently asked questions

Where can I buy 3RT1056-2NF36?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — no stock count or lead time is published here.

What is the coil voltage for 3RT1056-2NF36?

The coil is rated 96-127 V AC/DC. Pickup threshold is 0.8 x rated value; dropout is 0.6 x rated value at both 50 and 60 Hz.

What wire sizes does the 3RT1056-2NF36 accept?

Main power terminals accept 25-120 mm² stranded. Auxiliary terminals accept 2x 0.25-2.5 mm² solid or stranded. Coil terminals are spring-type for the same wire range.

MPN
3RT1056-2NF36