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Siemens 3RK4320-3DQ54-0BA2 — Motor Starters

Siemens 3RK4320-3DQ54-0BA2 SIRIUS Motor Starter, 1.25 A

MPN3RK4320-3DQ54-0BA2

Siemens SIRIUS 3RK4320-3DQ54-0BA2 motor starter, AS-Interface, direct starter, 1.25 A at 400 V AC-3, Class 10, IP54, 205 x 245 x 215 mm.

Siemens 3RK4320-3DQ54-0BA2 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

3RK4320-3DQ54-0BA2 — Identification
ParameterValue
Product designationmotor starter MCU for AS-Interface
Main circuit poles3
BrandSIRIUS
Product design / constructiondirect starter
Reference designation (IEC 81346-2)Q

Protection & Tripping

3RK4320-3DQ54-0BA2 — 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

3RK4320-3DQ54-0BA2 — Contacts & Control
ParameterValue
Switching contact typeelectromechanical

Communication

3RK4320-3DQ54-0BA2 — Communication
ParameterValue
AS-Interface protocol supportYes

Mechanical & Connection

3RK4320-3DQ54-0BA2 — 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

Active production, AS-Interface motor starter for distributed control

The 3RK4320-3DQ54-0BA2: The unit integrates two digital inputs and a motor brake output, and operates on a 24 V DC control supply (20.4–26.4 V) with a 340–440 V AC main circuit voltage at 50/60 Hz.

Mounting, environment, and compliance for panel integration

Enclosure dimensions are 245 mm wide, 215 mm high, and 205 mm deep, with IP54 protection — suitable for installation in control cabinets where dust and splash ingress is a concern, but not for direct washdown environments. Substance prohibitance compliance is documented per the 05/01/2012 date, covering RoHS and REACH requirements for the European market.

Frequently asked questions

What is the rated current of 3RK4320-3DQ54-0BA2 at 400 V AC-3?

The same 1.25 A rating applies at 400 V AC general use.

What communication protocol does this motor starter support?

It supports AS-Interface (AS-i) protocol for bus communication — no PROFIBUS DP or PROFINET onboard. The two digital inputs can be used for local sensors or pushbuttons.

MPN
3RK4320-3DQ54-0BA2