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Siemens 3RT2037-1AK64 — Contactors

Siemens 3RT2037-1AK64 SIRIUS Power Contactor, 65 A at 480 V

MPN3RT2037-1AK64
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Siemens SIRIUS power contactor, 3RT2037-1AK64, size S2, 65 A at 480 V AC-3, screw and snap-on mounting on 35 mm DIN rail.

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

Specifications

3RT2037-1AK64 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1AK64 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V55 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V10 hp
Rated value @ 24 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2037-1AK64 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.36
Rated value @ 50 Hz110 V
3RT2037-1AK64 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1AK64 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)
Short-circuit coordination type 2, fusegG: 125A (690V,100kA), aM: 63A (690V,100kA), BS88: 100A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2037-1AK64 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2037-1AK64 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1AK64 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1AK64 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm
3RT2037-1AK64 — Specifications
ParameterValue
At AC10 ... 18 ms

Product details

It's rated for 65 A at 480 V in AC-3 duty — that's the motor-switching curve, so it handles inductive loads like conveyors, pumps, and fans up to that current. That helps when you're shoehorning it into a crowded panel.

Mechanical and electrical ratings

Dimensions are 114 mm high, 55 mm wide, 174 mm deep. The width is the key panel-fit number — 55 mm is a standard S2 contactor width, so it'll drop into existing layouts without surprises. That covers most plant-floor environments, including unheated warehouses. Electrical life varies by duty: 800 operations/hour at AC-1 (resistive), 700/h at AC-3 (motor), 200/h at AC-4 (plugging/inching).

Clearances and wiring

That's tight enough for dense panel layouts — just don't crowd the arc chute. Main contact wiring accepts solid or stranded: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). The coil terminals are screw-type. No auxiliary switch is built in — if you need aux contacts, you'll add a separate block.

Frequently asked questions

What are the key dimensions for panel fit?

Width is 55 mm, height 114 mm, depth 174 mm. The 55 mm width is the critical panel-fit dimension — it matches the standard S2 frame size.

MPN
3RT2037-1AK64