Vishay Intertechnology, Inc. Chassis Mount Resistors RER75F3902RC02

The RER75F3902RC02 is a chassis mount wirewound resistor from Lingto Electronic Limited, designed for military applications and qualified to MIL-PRF-39009 standards. It features an aluminum heat sink housing and a molded construction that provides total environmental protection. This resistor is constructed with complete welded joints and offers non-inductive styles manufactured using Ayrton-Perry winding to minimize reactive components. With a power rating of 30 watts at 25 ¬8C, the RER75F3902RC02 has a resistance value of 39 kOc and a tolerance of ¬±1%. It operates effectively within a temperature range of -55 ¬8C to +250 ¬8C. The resistor is built with a copper-nickel or nickel-chrome alloy element, depending on the resistance value, and is encapsulated in silicone molded construction for durability. The housing is made of aluminum with a hard anodic coating, ensuring robust performance in demanding environments. Engineers considering this resistor should note its high insulation resistance of 10,000 MOc minimum when dry and 1,000 MOc minimum after moisture testing, along with its compliance with various military performance tests, including low temperature operation and moisture resistance. This product is suitable for applications requiring reliable performance under extreme conditions.