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Siemens 3RT7037-1AG20 — Contactors

Siemens 3RT7037-1AG20 S2 Contactor, 3-Pole, 690V AC-3, Screw

MPN3RT7037-1AG20

Siemens SIRIUS 3RT7037-1AG20, Size S2 contactor, 3-pole, screw-type terminals, AC-3 rated voltage 690 V, IP20 front / IP00 terminal, screw and snap-on 35 mm DIN rail mounting.

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

Specifications

3RT7037-1AG20 — Identification
ParameterValue
Contactor frame sizeS2
3RT7037-1AG20 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
3RT7037-1AG20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.36
Rated value @ 50 Hz110 V
3RT7037-1AG20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliabilityacceptability for PLC control (17 V, 5 mA)
3RT7037-1AG20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG NH 3NA: 160 A
Short-circuit coordination type 2, fusegL/gG NH 3NA: 100 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT7037-1AG20 — 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 standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT7037-1AG20 — Environmental
ParameterValue
Operating temperature range-10 ... +55 °C
Storage temperature range-25 ... +70 °C
Installation altitude, max.2 000 m
3RT7037-1AG20 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth115 mm

Product details

The control supply is AC voltage, with a coil that draws 0.76 W closing power and holds at 0.35 W DC.

Ratings that matter for the panel

The AC-3 maximum switching frequency is 800 operations per hour; if you're pushing into AC-4 duty (plugging, inching), that drops to 250 per hour. That's the difference between running a conveyor and jogging a press — plan your cycle times accordingly. Fuse coordination is spelled out: for Type 2 coordination you need gL/gG NH 3NA fuses rated at 100 A; for Type 1 coordination, those same fuses go to 160 A. That's your short-circuit protection curve — match it to your upstream breaker or the coordination study won't hold. Operating temperature range is -10 to +55 °C, storage from -25 to +70 °C. The enclosure rating is IP20 on the front and IP00 at the terminals — the terminals are live when the panel door is open, so standard finger-safe shrouding or a cover is expected.

Both the main current circuit and the auxiliary/control circuit use screw-type terminals. The main terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²). Finely stranded wire with core-end processing follows the same cross-section range. That covers most panel wiring up to 2.5 mm² — if you're running larger motor feeders, you'll need a terminal adapter or a larger frame size. The contactor accepts auxiliary switch modules as a product extension, so you can add NO/NC blocks for feedback or interlocking without replacing the base unit.

Frequently asked questions

What is the 3RT7037-1AG20 used for?

It is a Size S2 three-pole contactor rated for AC-3 motor switching up to 690 V, used in motor control centers, conveyor drives, pump panels, and general industrial machine control where three-phase loads need to be switched under load.

Where can I buy the 3RT7037-1AG20?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time, not before.

What are the key dimensions of the 3RT7037-1AG20?

Width is 55 mm, height is 112 mm, depth is 115 mm. It mounts on 35 mm DIN rail per DIN EN 50022.

Will the 3RT7037-1AG20 drop into a panel designed for a 3RT6017-1AF01?

Both are 3-pole screw-terminal contactors from the SIRIUS family, but the 3RT7037-1AG20 is a Size S2 frame while the 3RT6017-1AF01 is a smaller Size S0. The S2 is physically larger (55 mm wide vs S0's ~45 mm), so it will not fit the same DIN-rail footprint without panel rework. Check the mounting dimensions before ordering.

MPN
3RT7037-1AG20