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Siemens 3RT1056-6NF36 — Contactors

Siemens 3RT1056-6NF36 SIRIUS Power Contactor, S6, 96-127V Co

MPN3RT1056-6NF36
Active

Siemens SIRIUS power contactor, S6 frame, 3RT1056-6NF36, 96-127 V AC/DC coil, screw-type terminals, 170 mm depth, 120 mm width, 172 mm height.

$335.28Ref. price · indicative, final on quote
Siemens 3RT1056-6NF36 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

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

Product details

Fastened via screw fixing through a single 9 mm hole. Envelope is 172 mm high, 120 mm wide, 170 mm deep. Main power circuit accepts stranded cable from 25 to 120 mm². Control circuit (coil + auxiliary) uses screw-type terminals accepting 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), or max 2x (0.75…4 mm²) solid or stranded wire. Built-in auxiliary switch (1 N/O + 1 N/C typically) is present — the contactor ships with it, no separate add-on needed for basic status feedback. Its rated current: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V.

Coil performance and environmental range

Operate time is 80-90 ms on both AC and DC supply. Arcing time runs 10-15 ms. Pick-up voltage is 0.8 x rated (76.8 V minimum), drop-out is 1.1 x rated (139.7 V) — the wide hysteresis means the contactor holds in during sags but drops cleanly when the control signal is removed.

Frequently asked questions

What is the closest functional second-source to 3RT1056-6NF36?

The 3RT1055-6QF35 is a smaller frame (S5 vs S6) with a different coil voltage — it will not drop into the same panel without rewiring and resizing the main power lugs. The 3RT1056-6NF36's S6 frame handles 120 mm² main conductors; the S5 frame tops out at a smaller cross-section. Stick with the S6 frame for equivalent current capacity.

Where can I buy 3RT1056-6NF36?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — send an RFQ for a firm price and lead time.

What are the main dimensions of 3RT1056-6NF36?

Height 172 mm, width 120 mm, depth 170 mm. Mounting via one 9 mm screw hole, with clearances of 10 mm up/down/side and 20 mm forward.

What wire sizes does 3RT1056-6NF36 accept?

Main power circuit: stranded 25-120 mm². Control circuit (coil + aux): screw terminals accepting 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), or max 2x (0.75-4 mm²) solid or stranded.

MPN
3RT1056-6NF36