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Siemens 3RK4320-3DQ54-1BA2 — Motor Starters

Siemens 3RK4320-3DQ54-1BA2 SIRIUS Motor Starter, 1.25 A

MPN3RK4320-3DQ54-1BA2

Siemens SIRIUS 3RK4320-3DQ54-1BA2 reversing motor starter, AS-Interface, 1.25 A AC-3 at 400 V, Class 10, IP54, 205 x 245 x 215 mm.

Siemens 3RK4320-3DQ54-1BA2 datasheet (PDF)
StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RK4320-3DQ54-1BA2 — Identification
ParameterValue
Product designationmotor starter MCU for AS-Interface
Main circuit poles3
BrandSIRIUS
Product design / constructionreversing starter
Reference designation (IEC 81346-2)Q

Protection & Tripping

3RK4320-3DQ54-1BA2 — Protection & Tripping
ParameterValue
Trip classCLASS 10
Overload release setting range (current)0.9 ... 1.25 A
Duty / utilization type (IEC 60947-6-2)1

Contacts & Control

3RK4320-3DQ54-1BA2 — Contacts & Control
ParameterValue
Switching contact typeelectromechanical

Communication

3RK4320-3DQ54-1BA2 — Communication
ParameterValue
AS-Interface protocol supportYes

Mechanical & Connection

3RK4320-3DQ54-1BA2 — Mechanical & Connection
ParameterValue
Main circuit connection typescrew-type terminals
Mounting position+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface
Width245 mm
Height215 mm
Depth205 mm

Product details

SIRIUS reversing starter with AS-Interface bus

The 3RK4320-3DQ54-1BA2: It integrates motor protection, reversing contactors, and bus communication into a single enclosure rated IP54.

Bus integration and control supply

AS-Interface protocol is supported natively — no external gateway module needed for the bus connection. The control supply voltage is 20.4 to 26.4 V DC, which matches the standard AS-Interface power supply range. Two digital inputs are available on the starter for local sensors or pushbuttons, reducing the need for separate I/O blocks on the AS-Interface segment.

Panel fit and mounting flexibility

Dimensions are 205 mm deep, 245 mm wide, and 215 mm high — confirm the enclosure depth and backplate area before panel layout.

Frequently asked questions

What is the AC-3 motor current rating for 3RK4320-3DQ54-1BA2 at 400 V?

This is the motor switching current for reversing applications under IEC categories.

How can I order 3RK4320-3DQ54-1BA2 and check availability?

Submit an RFQ for current pricing and availability confirmation.

MPN
3RK4320-3DQ54-1BA2