This part is a kind of semiconductor called BU406.

Function of this product has 7 AMPERES NPN SILICON POWER TRANSISTORS 60 WATTS 150 and 200 VOLTS.

Manufacturers : Motorola Inc

Image and pinout :

Some of the text within the PDF file :

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by BU406/D NPN Power Transistors These devices are high voltage, high speed transistors for horizontal deflection output stages of TV’s and CRT’s. • • • • High Voltage: VCEV = 330 or 400 V Fast Switching Speed: tf = 750 ns (max) Low Saturation Voltage: VCE(sat) = 1 V (max) @ 5 A Packaged in Compact JEDEC TO–220AB BU406 BU407 7 AMPERES NPN SILICON POWER TRANSISTORS 60 WATTS 150 and 200 VOLTS ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ [ ... ]

BU406 PDF Datasheet Download