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Siemens 3RK4320-3NQ51-0BA2 — Motor Starters

Siemens 3RK4320-3NQ51-0BA2 SIRIUS Motor Starter

MPN3RK4320-3NQ51-0BA2

Siemens SIRIUS 3RK4320-3NQ51-0BA2 motor starter MCU for AS-Interface, direct starter, 10 A at 400 V AC-3, CLASS 10 trip, IP54, 205 x 245 x 215 mm.

Siemens 3RK4320-3NQ51-0BA2 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

3RK4320-3NQ51-0BA2 — 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

3RK4320-3NQ51-0BA2 — Protection & Tripping
ParameterValue
Trip classCLASS 10
Overload release setting range (current)7 ... 10 A
Duty / utilization type (IEC 60947-6-2)1

Contacts & Control

3RK4320-3NQ51-0BA2 — Contacts & Control
ParameterValue
Switching contact typeelectromechanical

Communication

3RK4320-3NQ51-0BA2 — Communication
ParameterValue
AS-Interface protocol supportYes

Mechanical & Connection

3RK4320-3NQ51-0BA2 — 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

AS-Interface motor starter for distributed control

The 3RK4320-3NQ51-0BA2: The control supply is 20.4–26.4 V DC, and the unit draws power from the AS-Interface bus — no separate 24 V supply needed for the logic, though the motor brake output (if used) requires its own feed.

Panel fit and environmental limits

Dimensions are 205 mm deep, 245 mm wide, 215 mm tall — the width is the critical panel cutout dimension; depth includes the bus connector and cable exit. Rated IP54, so it tolerates dust and splash in cabinet-free or light-washdown areas, but not hose-down or submersion. Operating ambient is -25 to +50 °C, which covers most indoor industrial environments without derating.

RoHS compliance date is 05/01/2012 (substance prohibitance), meaning it meets EU RoHS and REACH requirements for current installations.

Frequently asked questions

Where can I buy 3RK4320-3NQ51-0BA2 and get a price?

Submit your target quantity and delivery window; we confirm availability and pricing from authorized Siemens distribution at quote time.

MPN
3RK4320-3NQ51-0BA2