Product Overview

SIRIUS MCU motor starter with IP55 plastic enclosure, AS-Interface communication, reversing starter, 1.25 A performance class

This SIRIUS MCU motor starter (Article Number: 3RK4320-3DR51-1BA0) offers reliable motor control with IP55 protection in a plastic enclosure. The unit features AS-Interface communication, electromechanical switching, short-circuit protection with circuit breaker, and reversing starter capability without brake function. The motor circuit breaker includes bi-metal thermal protection with a 1.25 A performance class rating and M screw connection for power connections.

Key Features

• IP55 plastic enclosure for protection against dust and water ingress
• AS-Interface communication for fieldbus integration
• Reversing starter configuration without brake function
• 1.25 A performance class for motor protection
• Short-circuit protection with integrated circuit breaker
• Electromechanical switching for reliable operation
• Bi-metal thermal protection in motor circuit breaker
• M screw connection for power connections

Technical Specifications

• Net Weight: 2.462 kg
• Packaging Dimensions: 246.00 x 326.00 x 222.00 mm
• Packaging Quantity: 1 piece
• Quantity Unit: 1 Piece
• Country of Origin: Germany
• Performance Class: 1.25 A
• Enclosure Protection: IP55
• Communication: AS-Interface
• Switching Type: Electromechanical
• Starter Type: Reversing starter
• Connection Type: M screw connection
• Manual Operation: Without

Applications

• Motor control systems requiring reversing capability
• Industrial automation with AS-Interface fieldbus communication
• Manufacturing equipment requiring reliable motor protection
• Process control applications with 1.25 A motor requirements
• Machine control systems needing IP55 protection

Important Notes

• Suitable for motors up to 1.25 A performance class
• Reversing starter configuration without brake function
• Manual operation feature not included

Product Classifications

• eClass: Not specified
• ETIM: Not specified
• UNSPSC: Not specified

Compliance & Certifications

• Export Control: ECCN: N / AL: N
• RoHS Compliance: Since 01.05.2012
• WEEE Take-Back Obligation: Yes

REACH Compliance

Information obligation imposed by Article 33, REACH Regulation: This product includes articles containing substances from the candidate list in concentrations higher than 0.1% weight by weight (w/w): Lead and Lead monoxide (lead oxide). Based on current information, these substances do not pose risk when used as intended, including disposal. Please refer to product documentation for additional guidance.

Download existing graphical data for this product:

For technical documentation and CAD files, please visit:

• Official Product Datasheet (PDF)
• Siemens Industry Mall Product Page
• Siemens PARTcommunity for 3D CAD Models
• Siemens Technical Support Center for technical documentation requests