THS10100RJ - 

10W aluminum housed wirewound power resistors - THS10 Series
TE Connectivity THS series power resistors encapsulated in a silver aluminum housing and designed for heatsink mounting. The THS series power resistors are high quality, extremely stable and wire wound resistors capable of dissipating high power in a limited space with relatively low surface temperature through the aluminum housing to a specified heatsink. Applications for the Tyco THS series include vehicle braking and balancing resistors, capacitor charging and diskharging, crowbar, filters and general electrical machinery.