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Siemens 3RT2037-1NP34 — Contactors

Siemens 3RT2037-1NP34 SIRIUS Power Contactor, 175-280 VAC Co

MPN3RT2037-1NP34
Active

Siemens SIRIUS power contactor, 3RT2037-1NP34, S2 frame, 175-280 VAC coil, screw terminals, 55 mm width, 174 mm depth.

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

3RT2037-1NP34 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1NP34 — 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
3RT2037-1NP34 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz2 VA
Rated value @ 50 Hz175 ... 280 V
3RT2037-1NP34 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1NP34 — 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)
3RT2037-1NP34 — 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
3RT2037-1NP34 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1NP34 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1NP34 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm
3RT2037-1NP34 — Specifications
ParameterValue
At AC30 ... 55 ms

Product details

SIRIUS S2 Power Contactor, 175-280 VAC Coil

The Siemens 3RT2037-1NP34 is a SIRIUS S2 power contactor with a 175-280 VAC coil, screw-type terminals, and no built-in auxiliary switch.

Panel Fit and Clearance

At 55 mm wide and 174 mm deep, this S2 contactor fits a standard DIN-rail footprint. Minimum clearances: 10 mm upwards, downwards, and forwards; 6 mm at the side. Wire capacity is 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded per terminal.

Pick-up threshold is 0.8 of rated voltage; drop-out is 1.1 of rated value. For DC switching of auxiliary circuits, the contactor is rated at 6 A at 24 V, 2 A at 48 V or 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V.

Frequently asked questions

Where can I buy 3RT2037-1NP34 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the closest functional second-source to 3RT2037-1NP34?

The peer 3RT2036-1AC20-ZX95 is a functional alternative within the same SIRIUS S2 contactor family, but verify coil voltage and auxiliary contact configuration for your specific application.

What are the key dimensions of 3RT2037-1NP34?

Width is 55 mm, height is 114 mm, and depth is 174 mm. Minimum clearances: 10 mm upwards, downwards, and forwards; 6 mm at the side.

Will 3RT2037-1NP34 drop into a panel specified around 3RT2036-1AC20-ZX95?

Both are S2 frame contactors with the same 55 mm width and DIN-rail mounting, so the footprint is compatible. Verify the coil voltage range (175-280 VAC for this part) and auxiliary contact count before substitution.

What compliance documentation does Siemens provide for 3RT2037-1NP34?

As a SIRIUS-branded industrial control component, it is typically covered by Siemens declarations for RoHS, REACH, and applicable IEC/EN standards. Specific certificates should be requested at quote time.

MPN
3RT2037-1NP34