Description

Brief Product Description

The Siemens 3RW4928-8VB00 is an external cooling fan designed specifically for the SIRIUS 3RW402 (Size S0) soft starter series.¹ This high-efficiency accessory improves heat dissipation during high-frequency switching or heavy-duty starting cycles.

​Product Description

Enhanced Thermal Management for Motor Starters

The Siemens 3RW4928-8VB00 serves as a vital thermal regulation component for SIRIUS 3RW402 soft starters.² While many soft starters operate with natural convection, demanding applications—such as those with frequent starts or high ambient temperatures—often require active cooling to prevent thermal tripping. By attaching this fan directly to the soft starter housing, operators can significantly increase the permissible number of starts per hour and ensure the power semiconductors remain within safe operating limits. This proactive cooling strategy effectively extends the service life of the internal thyristors and protects the module from premature aging caused by heat stress.

Seamless Mechanical and Electrical Integration

As a native accessory within the SIRIUS modular system, the 3RW4928-8VB00 features a plug-and-play design that requires no complex wiring or specialized mounting brackets. The fan clips securely onto the 3RW402 (Size S0) frame, drawing its power directly from the starter interface. Consequently, it maintains the compact footprint of the ET 200SP motor control assembly while providing the airflow necessary for continuous operation. This integration ensures that the fan operates in synchronization with the motor’s duty cycle, providing cooling precisely when the thermal load is at its peak.

Versatile Industrial Applications

Industrial facilities frequently deploy the Siemens 3RW4928-8VB00 in environments where airflow is restricted or machinery operates under heavy loads. It is particularly effective for conveyor systems, large centrifugal pumps, and industrial compressors where “soft” starts are frequent. By maintaining a stable temperature profile, this fan assembly contributes to the overall reliability of the PLC-controlled automation system. Furthermore, its robust construction and compliance with Siemens’ rigorous quality standards make it suitable for harsh manufacturing environments that demand 24/7 equipment availability.

Technical Specification Overview