NPN power transistor — 100 V, 6 A, 65 W in TO-220
It comes in a standard TO-220-3 through-hole package, which allows direct mounting to a heatsink via the metal tab for thermal management. This part is part of the TIP41 series and is intended for linear amplifier stages, switching loads up to 6 A, and general power management in through-hole designs.
Saturation voltage and DC gain at full current
At 6 A collector current, the Vce(sat) is specified at 1.5 V maximum with a base drive of 600 mA — this sets the on-state voltage drop you need to budget for in a switching circuit. The minimum DC current gain (hFE) is 15 at 3 A and 4 Vce, which means the base drive must supply at least 400 mA to saturate the transistor at 6 A. The collector cut-off current is 700 µA maximum, a typical figure for a power BJT at rated voltage.