[10pc] Toshiba 5TUZ47C High Voltage Rectifier 1500V 5A TO220 'Damper Diode'
These diodes were originally designed for use in CRT monitors and TVs in the horizontal scan/deflection circuitry, in a role analogous to the body diode in a MOSFET. When the scan reaches the end of a line, the driver transistor switches off.