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Siemens 3RA2337-8XB30-1AG2 — Motor Starters

Siemens 3RA2337-8XB30-1AG2 SIRIUS Reversing Contactor

MPN3RA2337-8XB30-1AG2
Active

Siemens SIRIUS 3RA2337-8XB30-1AG2 reversing contactor assembly, S2 size, 30 kW at 400 V AC-3, 65 A at 480 V, 3RT2037-1AG20 contactors, screw terminals, DIN rail.

Siemens 3RA2337-8XB30-1AG2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RA2337-8XB30-1AG2 — Identification
ParameterValue
Product designationReversing contactor assembly
Main circuit poles3
BrandSIRIUS
Reference designation (IEC 81346-2)Q
3RA2337-8XB30-1AG2 — Ratings & Performance
ParameterValue
Rated motor power at 400 V30 kW
Rated motor power at 460/480 V (hp)50 hp
Rated motor power at 575/600 V (hp)50 hp
Rated current at 480 V65 A
Rated current at 600 V62 A
3RA2337-8XB30-1AG2 — Contacts & Control
ParameterValue
Rated voltage range at 50 Hz110 V
Control supply voltage typeAC
Auxiliary switch extensionYes
3RA2337-8XB30-1AG2 — Communication
ParameterValue
AS-Interface protocol supportNo
3RA2337-8XB30-1AG2 — Mechanical & Connection
ParameterValue
Main contact conductor range (AWG)2x (18 ... 2), 1x (18 ... 1)
Mounting / fastening methodscrew and snap-on mounting onto 35 mm standard mounting rail
Mounting position+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface
Width120 mm
Height141 mm
Depth130 mm
3RA2337-8XB30-1AG2 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C

Product details

The Siemens 3RA2337-8XB30-1AG2 is a SIRIUS reversing contactor assembly — a factory-built pair of mechanically interlocked contactors that reverse a three-phase motor without external wiring interlocks. It ships with two 3RT2037-1AG20 contactors pre-assembled on a common base plate, each rated for the full motor current. The 110 V 50/60 Hz coil matches standard control transformer outputs in North American and European panels.

Mounting and panel integration

Clearance requirements: 10 mm upwards, forwards, downwards, and sideways; zero backwards clearance needed.

Environmental and mechanical endurance

Vibration resistance is 18.5g at 5 ms and 11.6g at 10 ms AC, which covers most industrial machinery and conveyor applications.

Frequently asked questions

What contactors are supplied inside the 3RA2337-8XB30-1AG2?

It ships with two 3RT2037-1AG20 contactors, one per direction of rotation. These are mechanically interlocked on the factory base plate so both cannot close simultaneously.

What are the power ratings for the 3RA2337-8XB30-1AG2 at different voltages?

At 400 V AC-3 it is rated 30 kW. At 480 V the current rating is 65 A. Horsepower equivalents are 20 hp at 220/230 V and 50 hp at both 460/480 V and 575/600 V.

MPN
3RA2337-8XB30-1AG2