This part is a kind of semiconductor called BU508AFI.

Function of this product has SILICON DIFFUSED POWER TRANSISTOR.

Manufacturers : UTC

Image and pinout :

Some of the text within the PDF file :

UTC BU508 AFI NPN EPITAXIAL SILICON TRANSISTOR TO-3PML 1. 2. BASE COLLECTOR EMITTER SILICON DIFFUSED POWER TRANSISTOR DESCRIPTION The UTC BU508AFI is high voltage, high speed switching NPN transistors in a plastic envelope, primarily for use in horizontal deflection circuites of colour television receivers. 1 2 3 3. Features * TV color horizontal deflection. * With TO-3PML fully isolated package. Absolute Maximum Rating Tc=25°C PARAMETER Collector-base voltage(VBE=0) Collector-emitter voltage(IB=0) Emitter-base Voltage(IC=0) Collector peak current Collector current Collector power dissipation Junction temperature Storage temperature SYMBOL VCBO VCEO VEBO Icp Ic Pc Tj Tstg VALUE 1500 700 10 15 8 60 150 -65~150 UNIT V V V A A W °C °C ELECTRICAL CHARACTERISTIC [ ... ]

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