Anyone know where I can buy those? Or a module that can do the job ? It's for a ROMI CNC turning center. I'm not an expert but this module should switch the energy (maybe from the braking) to a discharge resistor. The specs from the datasheet. 50A/600v *has base-emitter a speed-up diode http://www.esg-modules.com/datasheet/KS524505.pdf Found on amazon for $217.85 and I think this is too much. Thanks --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .