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Siemens 3RA2328-8XB30-1AG2 — Motor Starters

Siemens 3RA2328-8XB30-1AG2 SIRIUS Reversing Contactor

MPN3RA2328-8XB30-1AG2
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Siemens SIRIUS 3RA2328-8XB30-1AG2 reversing contactor assembly, S0 size, 34 A at 480 V, 18.5 kW at 400 V, 110 V 50/60 Hz coil, screw terminals, DIN rail mount.

$156.21Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RA2328-8XB30-1AG2 — Identification
ParameterValue
Product designationReversing contactor assembly
Main circuit poles3
BrandSIRIUS
Reference designation (IEC 81346-2)Q
3RA2328-8XB30-1AG2 — Ratings & Performance
ParameterValue
Rated motor power at 400 V18.5 kW
Rated motor power at 460/480 V (hp)25 hp
Rated motor power at 575/600 V (hp)25 hp
Rated current at 480 V34 A
Rated current at 600 V27 A
3RA2328-8XB30-1AG2 — Contacts & Control
ParameterValue
Rated voltage range at 50 Hz110 V
Control supply voltage typeAC
Auxiliary switch extensionYes
3RA2328-8XB30-1AG2 — Communication
ParameterValue
AS-Interface protocol supportNo
3RA2328-8XB30-1AG2 — Mechanical & Connection
ParameterValue
Main contact conductor range (AWG)2x (16 ... 12), 2x (14 ... 8)
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
Width90 mm
Height101 mm
Depth97 mm
3RA2328-8XB30-1AG2 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C

Product details

The 3RA2328-8XB30-1AG2: No stock-holding claim — quoted per order.

What the 34 A at 480 V rating means for fit

The headline 34 A at 480 V is the AC-3 motor-switching current — the value that governs whether this assembly starts and stops a given motor without welding the contacts. For a 480 V three-phase motor, 34 A in AC-3 translates to roughly 25 hp, which matches the 25 hp rating at 460/480 V on the spec line. At 400 V, the assembly is rated 18.5 kW in AC-3 duty — that is the continuous motor load it handles across the line. The AC-4 rating (inching / plugging duty) at 400 V is 11 kW, about 60 % of the AC-3 figure, so if the application requires frequent reversing under load, size against the AC-4 number, not the AC-3 headline.

Mounting and wiring — drops into a standard S0 panel footprint

S0 contactor size, 90 mm wide, 101 mm tall, 97 mm deep — fits the standard S0 DIN-rail footprint. All terminals are screw-type — no special crimp tooling needed for the panel build.

Mechanical life and environmental limits

Rated for 10,000,000 operating cycles typical — that is the mechanical life of the contactor mechanism, not the electrical life under load. In a reversing application that cycles once every 10 seconds, that is roughly 3 years of continuous 24/7 operation before the mechanism wears out. Shock resistance: 13.5 g / 5 ms and 8.3 g / 10 ms on AC, 15 g / 5 ms and 10 g / 10 ms on DC. The clearance around the assembly: 6 mm upwards, forwards, downwards, and to the side; 0 mm backwards — it can sit flush against the back panel.

Frequently asked questions

What contactors are supplied inside 3RA2328-8XB30-1AG2?

The assembly includes two 3RT2028-1AG20 contactors, one per direction of rotation, with a mechanical interlock. This is a pre-configured reversing pair — no separate reversing kit or wiring of interlocks needed.

MPN
3RA2328-8XB30-1AG2