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Siemens 3RK4320-3MQ54-0BA3 — Motor Starters

Siemens 3RK4320-3MQ54-0BA3 SIRIUS motor starter MCU

MPN3RK4320-3MQ54-0BA3

Siemens SIRIUS 3RK4320-3MQ54-0BA3 motor starter MCU, AS-Interface, direct starter, 8 A at 400 V AC-3, CLASS 10, IP54, 2 digital inputs, 24 V DC control supply, 205 x 245 x 215 mm.

Siemens 3RK4320-3MQ54-0BA3 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

3RK4320-3MQ54-0BA3 — 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

3RK4320-3MQ54-0BA3 — Protection & Tripping
ParameterValue
Trip classCLASS 10
Overload release setting range (current)5.5 ... 8 A
Duty / utilization type (IEC 60947-6-2)1

Contacts & Control

3RK4320-3MQ54-0BA3 — Contacts & Control
ParameterValue
Switching contact typeelectromechanical

Communication

3RK4320-3MQ54-0BA3 — Communication
ParameterValue
AS-Interface protocol supportYes

Mechanical & Connection

3RK4320-3MQ54-0BA3 — 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

AS-Interface motor starter with integrated brake control

The 3RK4320-3MQ54-0BA3: The unit includes a motor brake output for 400 V AC brake control, saving an external brake contactor in applications like conveyors or hoists.

Bus integration and I/O count

AS-Interface protocol support is built in, with 2 digital inputs and a 24 V DC control supply (20.4... 26.4 V DC). No PROFIBUS DP or PROFINET protocol on this variant.

Mounting and environmental fit

IP54 protection means it's dust-protected and splash-resistant — suitable for industrial enclosures but not washdown zones. Dimensions are 205 mm depth, 245 mm width, 215 mm height — plan the cutout and clearance accordingly.

Frequently asked questions

How can I get current pricing and availability for 3RK4320-3MQ54-0BA3?

Submit an RFQ through this listing.

What compliance documentation is available for 3RK4320-3MQ54-0BA3?

Standard Siemens documentation (CE, UKCA) applies per the SIRIUS series.

MPN
3RK4320-3MQ54-0BA3