Specification: Item Type: Programmable DC Motor Controller     Material: ABS and stainless steel     OE: 1268 5403     Application: According to the command of gear, throttle, brake, etc., the electric energy stored in the power battery will be converted into the electric energy required by the drive motor to control the driving status of the electric vehicle such as starting operation, in and out speed, climbing strength, etc., or will help the electric vehicle brake and store part of the brake energy into the power battery.     Specifications:     PWM operating frequency: 16 kHz     Electrical isolation from heat sink (min.): 500 VAC     KSI input voltage (min.): 16.8 V     KSI input current (typical): 160 mA without programmer; 200 mA with programmer     Ambient operating temperature range: -40°C to 50°C     Heatsink overtemperature cutback: starts at 85°C; cutoff at 95°C     Heatsink undertemperature cutback: 50% armature current at -25°C     Main Features:     CURTIS Model: 1268-5403     Nominal battery voltage (volts): 48V (default setting) or 36V     Armature 2 minute rated current (amps): 400     Field 2-minute rated current (amps): 50     Logic enable and logic supply input voltage (min.): 16.8 V     Logic enable and logic supply input current (no contactor engagement): 160 mA without programmer; 200 mA with programmer     Logic input voltage: 20.0 V High; 7.5 V Low     Logic input current 10 mA     Throttle Types: A variety of throttles are available for use with the 1268 controller, including 5 kΩ 3-wire potentiometers and 0-5 V throttles.