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Siemens 3RT2037-1NB30 — Contactors

Siemens 3RT2037-1NB30 SIRIUS Power Contactor, Size S2, 20-33

MPN3RT2037-1NB30
Active

Siemens SIRIUS 3RT2037-1NB30 power contactor, Size S2, 55 mm wide, 130 mm deep, 114 mm tall, coil 20-33 V, screw terminals.

$135.20Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT2037-1NB30 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1NB30 — 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
3RT2037-1NB30 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz2 VA
Rated value @ 50 Hz20 ... 33 V
3RT2037-1NB30 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1NB30 — 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)
3RT2037-1NB30 — 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
3RT2037-1NB30 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1NB30 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1NB30 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth130 mm
3RT2037-1NB30 — Specifications
ParameterValue
At AC30 ... 55 ms

Product details

The Siemens 3RT2037-1NB30 is an S2-frame SIRIUS power contactor, current production, with a coil rated from 20 to 33 V. The contactor switches motor loads up to the AC-3 duty cycle it's designed for, and the screw-terminal main contacts accept up to 2 × 2.5 mm² conductors.

Mounting & Envelope

The housing is 114 mm high, 55 mm wide, and 130 mm deep. Side clearance is 6 mm; vertical spacing above and below is 10 mm each.

MPN
3RT2037-1NB30