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Siemens 3RT2037-1AM20 — Contactors

Siemens 3RT2037-1AM20 SIRIUS Power Contactor, Size S2, 65 A

MPN3RT2037-1AM20
Active

Siemens SIRIUS power contactor, 3RT2037-1AM20, size S2, 65 A at 480 V AC-3, screw-type coil terminals, screw and snap-on DIN rail mounting.

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

3RT2037-1AM20 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1AM20 — 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
3RT2037-1AM20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.36
Rated value @ 50 Hz208 V
3RT2037-1AM20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1AM20 — 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)
3RT2037-1AM20 — 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
3RT2037-1AM20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1AM20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1AM20 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth130 mm
3RT2037-1AM20 — Specifications
ParameterValue
At AC10 ... 18 ms

Product details

It carries a 65 A rated operational current at 480 V in AC-3 duty — that's the motor-switching category per IEC 60947-4-1, so it handles the inrush and breaking of squirrel-cage motors up to that current without welding or excessive contact wear. The coil termination uses screw-type terminals, and the main and auxiliary contacts are accessible for wiring with 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded conductors.

The S2 footprint is 55 mm wide, 114 mm tall, and 130 mm deep, so it occupies a three-module-wide slot on the rail.

Switching performance and operating conditions

The contactor is rated for up to 700 operating cycles per hour in AC-3 and AC-3e duty, 800 cycles per hour in AC-1 (resistive loads), and 200 cycles per hour in AC-4 (plugging and inching). Arc time runs 10 to 20 ms, with a make time of 10 to 18 ms at AC — fast enough for most motor starters and transfer switching. Auxiliary contacts are built in, with a normally open and normally closed configuration (1 NO + 1 NC) for feedback or interlocking. Switching capacity on the auxiliaries: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V — adequate for PLC inputs, pilot lights, and contactor coils in the same panel.

Frequently asked questions

How do I get current pricing and availability for 3RT2037-1AM20?

Pricing and availability are confirmed at quote time against an RFQ through independent distribution. Submit a request with your quantity and target delivery window for a current commercial response.

What is 3RT2037-1AM20's listed depth and width?

The depth is 130 mm and the width is 55 mm, with a height of 114 mm. This is the size S2 frame, occupying a three-module-wide slot on 35 mm DIN rail.

Will 3RT2037-1AM20 drop into a panel specified around 3RT2016-1AG62 without rewiring?

No — the 3RT2037-1AM20 is a size S2 frame (55 mm wide), while the 3RT2016-1AG62 is a smaller size S0 frame (45 mm wide). The footprint and terminal spacing differ, so the panel layout and wiring would need adjustment. The ratings also differ significantly: the 3RT2037-1AM20 carries 65 A at 480 V AC-3 versus the smaller contactor's lower current rating.

MPN
3RT2037-1AM20