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Siemens 3RT2037-1AR64 — Contactors

Siemens 3RT2037-1AR64 SIRIUS Power Contactor, 65 A AC-3, 400

MPN3RT2037-1AR64
Active

Siemens SIRIUS power contactor, 3RT2037-1AR64, Size S2, 65 A AC-3 at 480 V, 400 V 50 Hz coil, screw terminals, screw and snap-on DIN rail mount.

Siemens 3RT2037-1AR64 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT2037-1AR64 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1AR64 — 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
3RT2037-1AR64 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.36
Rated value @ 50 Hz400 V
3RT2037-1AR64 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1AR64 — 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)
3RT2037-1AR64 — 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
3RT2037-1AR64 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1AR64 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1AR64 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm
3RT2037-1AR64 — Specifications
ParameterValue
At AC10 ... 18 ms

Product details

The Siemens 3RT2037-1AR64 is a SIRIUS power contactor in Size S2, rated 65 A at 480 V in AC-3 duty — that's the motor-switching current, so it handles a 30–40 hp induction motor on a 480 V line without derating. The coil pulls 400 V at 50 Hz (0.36 A holding, 0.39 A at 60 Hz). Screw terminals on the magnet coil; main contacts accept 2x (0.75...2.5 mm²) solid or stranded.

Dimensions: 114 mm high, 55 mm wide, 174 mm deep.

Mechanical endurance typical 10 million operations. Switching rates: 800 cycles/h at AC-1, 700 at AC-3, 200 at AC-4. Arcing time 10–20 ms; closing time 10–18 ms. No auxiliary switch built in — you'll need a separate block if you're feeding a PLC input or status lamp.

Frequently asked questions

What is 3RT2037-1AR64's listed depth (174 mm) on this component line?

The depth is 174 mm. That's the dimension from the DIN rail mounting surface to the front of the contactor — important for enclosure depth clearance.

MPN
3RT2037-1AR64