Siemens 3RW3936-8A Cooling Fan Sirius Soft Starter

Product Description

The SIEMENS 3RW3936-8A is a replacement cooling fan designed for use with SIRIUS series soft starters. This fan maintains proper thermal management inside the soft starter enclosure by moving air across heat-generating components during motor start and run cycles. Cooling fans like this are direct OEM-style replacements that restore proper airflow when the original fan fails due to bearing wear or motor burnout. Installation is typically performed by a licensed electrician or controls technician during scheduled maintenance or corrective service. The unit ships as a single piece and measures approximately 2.047 inches by 1.929 inches by 2.874 inches, weighing under 0.1 pounds.

This fan is suited for industrial and commercial applications where SIRIUS soft starters are deployed to manage motor starting current and reduce mechanical stress on driven equipment. Typical environments include pump stations, conveyor systems, compressor panels, and HVAC fan array controls. The compact form factor allows it to fit within the tight clearances of the soft starter housing without modification.

Key Features

• Direct replacement cooling fan for SIRIUS series soft starters
• Compact dimensions: 2.047 inches x 1.929 inches x 2.874 inches
• Lightweight at 0.068 pounds for easy handling during service
• Single-unit pack quantity for individual component replacement
• Restores OEM thermal performance to soft starter assemblies

Compatibility

Designed as an OEM-style replacement cooling fan for SIEMENS SIRIUS series soft starters. Confirm fitment against the specific soft starter model number before installation.

Installation Notes

De-energize and lockout/tagout the soft starter and all associated control circuits before beginning service, following NFPA 70E arc flash and shock hazard procedures. A licensed electrician or qualified controls technician should perform this replacement. Verify fan orientation and connector polarity match the original unit before restoring power. Do not operate the soft starter with the cooling fan disconnected, as this may cause thermal shutdown or component damage.

Technical Specifications

• Length: 2.047 inches
• Width: 1.929 inches
• Height: 2.874 inches
• Weight: 0.068 pounds
• Package Quantity: 1 per pack
• UPC: 75455465705

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RW3936-8A