1SFN050300R1003

The ABB RC5-3/440 Surge Suppressor is an RC-type accessory designed for use with compatible ABB AX contactors. Identified by part number 1SFN050300R1003, it is installed in parallel with the contactor coil to reduce the overvoltage transient that can occur when the coil is switched off.

Limiting these fast voltage transients can help reduce electrical interference in nearby control circuits and electronic equipment. The RC5 uses a clip-on arrangement for both mounting and connection, and ABB’s catalogue states that the accessory does not increase the overall dimensions of the contactor. ABB lists the RC5 type for AC control-circuit voltages from 250 to 440 V.

Before ordering or installation, verify the contactor model, accessory fit and coil voltage against the product documentation. For availability and assistance selecting the correct suppressor, contact Ahmedabad Electric Corporation.