Alltrax SR-48500 Motor Controller - Fan, Fuse & Mounting Hardware Included For Series and Permanent Magnet Motors Features: Color coded terminals 12-48 Volts 500 Amps Peak 575(Peak Amp Mode) Standard 4-spade Flexible USB programming Integrated heatsink mounts on any suitable surface Solenoid Control for Main DC Control Auto-throttle calibration for smooth operation Specifications: DC motor controller for series and permanent magnet motors ABS + PC510 flame resistant thermal plastic enclosure All copper heat sinks Sealed epoxy UL-94-VO / 5VA flame rating (best in industry) Adjustable undervoltage cutback 8-30 VDC Adjustable overvoltage shutdown 30-60 VDC Operating Frequency: 18k Hz Voltage drop @ 100amps: