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Siemens 3RT2037-1AD04 — Contactors

Siemens 3RT2037-1AD04 SIRIUS Power Contactor, 65 A at 480 V

MPN3RT2037-1AD04
Active

Siemens SIRIUS, Size S2 power contactor, 3RT2037-1AD04, 65 A at 480 V AC-3, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail.

Siemens 3RT2037-1AD04 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

3RT2037-1AD04 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1AD04 — 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
3RT2037-1AD04 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.37
Rated value @ 50 Hz42 V
3RT2037-1AD04 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1AD04 — 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)
3RT2037-1AD04 — 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
3RT2037-1AD04 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1AD04 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1AD04 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm
3RT2037-1AD04 — Specifications
ParameterValue
At AC10 ... 18 ms

Product details

Contactor sizing and duty

The Siemens SIRIUS 3RT2037-1AD04 is a Size S2 power contactor rated 65 A at 480 V in AC-3 duty — that's the motor-switching current for a typical 3-phase induction motor up to roughly 30 kW depending on voltage. At AC-1 (resistive loads) the maximum operating rate is 800 cycles per hour, while AC-3 (cage motor starting) allows 700 cycles per hour. The contactor carries a mechanical life of 10 million operations typical.

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

Coil and auxiliary contacts

The magnet coil termination uses screw-type terminals. Rated switching capacity at 24 V is 6 A; at 48 V and 60 V it drops to 2 A; at 110 V it is 1 A; at 125 V it is 0.9 A; at 220 V it is 0.3 A; at 400 V it is 3 A; at 440 V it is 0.6 A; at 500 V it is 2 A. The contactor ships without an auxiliary switch block — that is a separate order for adding status feedback.

Frequently asked questions

Where can I buy 3RT2037-1AD04 and how do I get a price?

The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request for quotation to get a firm price and lead time.

What is 3RT2037-1AD04's listed depth (174 mm) on this component line?

The depth is 174 mm, with a height of 114 mm and a width of 55 mm.

Will 3RT2037-1AD04 drop into a panel that was specified around 3RT2036-1AC20-ZX95 without rewiring?

Both are Size S2 SIRIUS contactors with the same DIN-rail footprint and screw-type coil terminals, so the mounting and main power connections are compatible. However, the auxiliary contact configuration differs — the 3RT2036 variant carries an integrated auxiliary switch block, while the 3RT2037-1AD04 ships without one. If the existing panel wiring relies on auxiliary contacts from the contactor, you will need to add a separate auxiliary switch block.

MPN
3RT2037-1AD04