We receive a large number of enquiries for power resistors for applications in a wide range of power supplies. High wattage power supplies are used in railway power converters and controllers, signalling and safety monitoring systems. The need for pulse tolerant and transient resistant resistors is especially important as the railway environment is electrically “noisy” and swtiching of high voltage transformers can create transients with voltages greater than 1KV for short periods of time (Typically microseconds).
The Y Series of Power Resistors is suitable for applications requiring 500 Watt to 1200 Watt power rating and are especially useful in high temperature environments. This series of resistor can withstand temperatures of over 1000 C and have an overload rating of 5 times power rating for short periods of time. For high voltage applications (>2KV), custom made versions of the Y Series Power Resistors are available.