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Siemens 3RT1066-6SP36 — Contactors

Siemens 3RT1066-6SP36 SIRIUS Power Contactor, S10 Frame, 200

MPN3RT1066-6SP36
Active

Siemens SIRIUS power contactor, S10 frame, 200-277 VAC coil, screw-type terminals, MTBF 75 a, current lifecycle.

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

Specifications

3RT1066-6SP36 — Identification
ParameterValue
Contactor frame sizeS10
3RT1066-6SP36 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V280 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
3RT1066-6SP36 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.4
Rated value @ 50 Hz200 ... 277 V
3RT1066-6SP36 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1066-6SP36 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 500 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 400 A (690 V, 100 kA), aM: 315 A (690 V, 50 kA), BS88: 400 A (415 V, 50 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT1066-6SP36 — 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
3RT1066-6SP36 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1066-6SP36 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1066-6SP36 — Mechanical
ParameterValue
Width145 mm
Height210 mm
Depth202 mm
3RT1066-6SP36 — Specifications
ParameterValue
At AC115 ... 130 ms

Product details

It carries a 200-277 VAC coil, screw-type terminals, and an MTBF of 75 a — a strong reliability figure for continuous-duty applications in HVAC, pumping, and conveyor lines.

The S10 frame is a physically large contactor — 210 mm high, 145 mm wide, 202 mm deep — sized for cable cross-sections up to 240 mm² stranded. That means it handles heavy feeder or motor circuits where smaller frames would require paralleling or busbar adapters. Switching rates are specified per duty class: 500 operations/hour at AC-1 (resistive) and AC-3 (squirrel-cage motor starting), 250 ops/h at AC-2 (slip-ring motor), and 130 ops/h at AC-4 (plugging/inching). For a conveyor running frequent start/stop cycles, the AC-3 rate is the limiting number — the contactor can cycle every 7.2 seconds continuously without exceeding thermal limits. Auxiliary contacts are built in, rated 10 A at 24 V, 2 A at 48 V, and 2 A at 60 V — enough to drive a PLC input or a small relay directly. Mechanical endurance is typical 10 million operations, so in a low-cycle application (e.g., a pump running hours at a time) the contactor will outlast the panel.

Fastened by screw fixing through 11 mm holes — not a DIN-rail snap-on. The coil terminals accept 2x (0.5-1.5 mm²) or 2x (0.75-2.5 mm²) solid/stranded, with a max of 2x (0.75-4 mm²). Power terminals take 70-240 mm² stranded copper.

Frequently asked questions

What is the MTBF of 3RT1066-6SP36?

The listed MTBF is 75 a, which indicates a reliable design for continuous industrial duty.

What is the coil voltage for 3RT1066-6SP36?

The coil is rated 200-277 VAC, covering 208/240/277 V control circuits.

Where can I buy 3RT1066-6SP36?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.

MPN
3RT1066-6SP36