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Siemens 3RT1076-2NP36 — Contactors

Siemens 3RT1076-2NP36 SIRIUS Power Contactor, S12, 200-277V

MPN3RT1076-2NP36
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Siemens SIRIUS, power contactor, size S12, 200-277 V AC coil, spring-type terminals, screw fixing, 225 x 160 x 214 mm.

Siemens 3RT1076-2NP36 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1076-2NP36 — Identification
ParameterValue
Contactor frame sizeS12
3RT1076-2NP36 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V430 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1076-2NP36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.4
Rated value @ 50 Hz200 ... 277 V
3RT1076-2NP36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1076-2NP36 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 630 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 500 A (690 V, 100 kA), aM: 500 A (690 V, 50 kA), BS88: 500 A (415 V, 50 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT1076-2NP36 — 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
3RT1076-2NP36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1076-2NP36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1076-2NP36 — Mechanical
ParameterValue
Width160 mm
Height214 mm
Depth225 mm
3RT1076-2NP36 — Specifications
ParameterValue
At AC80 ... 100 ms

Product details

What this SIRIUS S12 contactor is

It is a current-production part, actively manufactured.

The magnet coil is rated for 200–277 V AC and terminates on spring-type terminals — no screw torque to verify, but the stripped length and ferrule size matter for a reliable hold. Coil pick-up and drop-out times run 80–100 ms on AC and DC alike, so don't expect a fast-acting contactor for precise load shedding; this is a general-purpose switching device.

Duty-cycle and switching frequency

Switching frequency varies sharply by duty class: AC-1 (resistive) allows 500 operations per hour, AC-3 (squirrel-cage motor start/run) drops to 420 ops/h, AC-2 (slip-ring motor) to 170 ops/h, and AC-4 (plugging/inching) to 130 ops/h. For a motor-switching application, the AC-3e rating at 420 ops/h is the one that governs real throughput — exceeding it accelerates contact wear.

Auxiliary contacts and environmental limits

An auxiliary switch is built in, rated 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V — sufficient for signalling to a PLC input or a pilot light, but watch the voltage derating curve if you're switching DC inductive loads.

Frequently asked questions

What are the key ratings for this contactor?

It is a size S12 power contactor with a 200–277 V AC coil, spring-type coil terminals, main power terminals accepting 70–240 mm² stranded cable, and an auxiliary switch rated 10 A at 24 V. Switching frequency reaches 420 ops/h in AC-3 duty.

What compliance documentation is available for 3RT1076-2NP36?

As a Siemens SIRIUS product, it carries CE marking for the European market and is manufactured under IEC/EN 60947-4-1. UL and CSA listings are typical for this series; verify the specific certification on the nameplate or request the declaration of conformity with your RFQ.

Will 3RT1076-2NP36 drop into a panel specified for 3RT2024-2BB40?

Not without checking the mounting and wiring. The 3RT1076-2NP36 uses screw fixing through an 11 mm hole, while the 3RT2024-2BB40 may mount on a DIN rail or a different bolt pattern. The terminal range (70–240 mm²) is heavier than smaller SIRIUS frames, so the lug size and bending radius in the panel must be verified. Always compare the dimensional drawing before assuming a drop-in swap.

MPN
3RT1076-2NP36