Barry Industries offers a RoHS compliant flange mount termination which dissipates 800W with minimal return loss over a DC to 1GHz bandwidth.
 
The thick film on Aluminum Nitride TA50R0-800-15X termination, with its internally matched circuit architecture, has 25dB or better return loss from DC to 1GHz. Four-hole flange and input tab are constructed of nickel-plated copper. Overall footprint is 1.90-in. x 1.04-in. Additionally, Barry offers many other high-power flange mount terminations with power ratings from 10W to 5000W in numerous configurations.
 
Barry Industries