The IRF840APBF is a N-channel Power MOSFET with low gate charge and improved gate, avalanche and dynamic dv/dt ruggedness.
The STP9NK50Z is a SuperMESH™ N-channel Zener-protected MOSFET obtained through an extreme optimization of well-established strip-based PowerMESH™ layout. In addition to pushing ON-resistance significantly down, special care is taken to ensure a very good dV/dt capability for the most demanding applications.
Thanks to STMicroelectronics, both your amplification and switching needs can be taken care of with one component: the STP7N52DK3 power MOSFET. Its maximum power dissipation is 90000 mW. In order to ensure parts aren"t damaged by bulk packaging, this product comes in tube packaging to add a little more protection by storing the loose parts in an outer tube. This N channel MOSFET transistor operates in enhancement mode. This MOSFET transistor has an operating temperature range of -55 °C to 150 °C.