NPN Silicon Power Transistor
High Voltage SWITCHMODE™ Series

Designed for use in electronic ballast (light ballast) and in Switchmode Power supplies up to 50 Watts. Main features include:

• Improved Efficiency Due to:
   — Low Base Drive Requirements (High and Flat DC Current Gain hFE)
   — Low Power Losses (On–State and Switching Operations)
   — Fast Switching: tfi = 100 ns (typ) and tsi = 3.2 µs (typ)
   — Fast Switching: @ IC = 2.0 A, IB1 = IB2 = 0.4 A
• Full Characterization at 125°C
• Tight Parametric Distributions Consistent Lot–to–Lot
• BUL45F, Case 221D, is UL Recognized at 3500 VRMS: File #E69369