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Siemens 3RT1276-6AM36 — Contactors

Siemens 3RT1276-6AM36 SIRIUS Vacuum Contactor, S12, 200-220

MPN3RT1276-6AM36
Active

Siemens SIRIUS vacuum contactor, size S12, 200-220 V AC coil, screw-type coil terminals, 214 x 160 x 225 mm, screw fixing.

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

Specifications

3RT1276-6AM36 — Identification
ParameterValue
Contactor frame sizeS12
3RT1276-6AM36 — 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
3RT1276-6AM36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.9
Rated value @ 50 Hz200 ... 220 V
3RT1276-6AM36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1276-6AM36 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 800 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 800 A (690 V, 50 kA), aM: 630 A (690 V, 50 kA), BS88: 800 A (415 V, 50 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT1276-6AM36 — 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
3RT1276-6AM36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1276-6AM36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1276-6AM36 — Mechanical
ParameterValue
Width160 mm
Height214 mm
Depth225 mm
3RT1276-6AM36 — Specifications
ParameterValue
At AC60 ... 100 ms

Product details

Coil is rated 200-220 V AC, screw-type terminals, and the contactor mounts via screw fixing with a ±22.5° tilt allowance on vertical surfaces — useful when aligning busbars or cable entries in a dense panel. Dimensions are 214 mm high, 160 mm wide, 225 mm deep — a substantial footprint that needs clear access for main power cables (stranded up to 240 mm²).

Rated for 750 operating cycles per hour at AC-3 (and AC-3e) duty — that's the standard motor switching profile (start, run, stop). At AC-4 (plugging / inching) it drops to 250 ops/h; at AC-1 (resistive) it's 700 ops/h. If your process involves frequent reversing or jogging, the AC-4 figure governs the mechanical life. Coil pick-up and drop-out times are 60-100 ms for both AC and DC supplies — consistent enough for sequenced starter banks, but not a fast-acting device for precision timing circuits.

MPN
3RT1276-6AM36