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® BUL89
HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR
s HIGH VOLTAGE CAPABILITY s MINIMUM LOT-TO-LOT SPREAD FOR
RELIABLE OPERATION s LOW BASE-DRIVE REQUIREMENTS s VERY HIGH SWITCHING SPEED s FULLY CHARACTERIZED AT 125oC
APPLICATIONS s ELECTRONIC TRANSFORMER FOR
HALOGEN LAMPS s SWITCH MODE POWER SUPPLIES
DESCRIPTION The BUL89 is manufactured using high voltage Multiepitaxial Mesa technology for cost-effective high performance. It uses a Hollow Emitter structure to enhance switching speeds. The BUL series is designed for use in lighting applications and low cost switch-mode power supplies.