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Siemens 3RT2037-3AH00 — Contactors

Siemens 3RT2037-3AH00 SIRIUS Power Contactor, 65 A at 480 V,

MPN3RT2037-3AH00
Active

Siemens SIRIUS power contactor, 3RT2037-3AH00, Size S2, 65 A at 480 V AC-3, spring-type terminals, screw and snap-on mounting onto 35 mm DIN rail.

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

3RT2037-3AH00 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-3AH00 — 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 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2037-3AH00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.37
Rated value @ 50 Hz48 V
3RT2037-3AH00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-3AH00 — 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)
3RT2037-3AH00 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2037-3AH00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-3AH00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-3AH00 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth130 mm
3RT2037-3AH00 — Specifications
ParameterValue
At AC10 ... 18 ms

Product details

The Siemens 3RT2037-3AH00 is a SIRIUS power contactor, Size S2, rated 65 A at 480 V in AC-3 duty — that's the motor-switching current, which is the figure that decides whether this contactor handles your load without welding contacts or overheating. The 55 mm width and 114 mm height fit a standard 35 mm DIN rail per DIN EN 60715, with screw and snap-on mounting; the 130 mm depth leaves room for wiring in a shallow enclosure. That's a time-saver on the panel build and one less thing to vibrate loose on a conveyor line.

That's tight enough for most enclosures — just watch the arc space if you're running high-fault duty.

Mechanical endurance and switching frequency

Switching frequency maxes at 800 cycles/hour in AC-1 (resistive) and 700 cycles/hour in AC-3 (motor) duty; AC-4 (plugging/inching) drops to 200 cycles/hour. If your application jogs the motor repeatedly, stay under the AC-4 limit or the contacts will erode fast.

Frequently asked questions

Will 3RT2037-3AH00 drop into a panel specified around 3RT2015-2AP02 without rewiring?

The 3RT2037-3AH00 is a Size S2 contactor (55 mm wide, 114 mm tall, 130 mm deep) with spring-type terminals, while the 3RT2015-2AP02 is a smaller Size S0 frame. The footprint and terminal layout differ — you would need to verify the mounting hole pattern and wiring clearance before assuming a drop-in replacement.

MPN
3RT2037-3AH00