The 2SK2508, 2SK-2508, K2508, 2508 is a 250V 13A 45W TO-220NIS Package, This is a shortly to be discontinued. For new designs, the following product(s) should be used instead of this product.
The 2SK2461, 2SK-2461, K2461, 2461 is a 100V 20A 35W N-Channel Field Effect Transistor TO-220NIS Package MOSFET, Its designed for high speed switching applications. Low On-Resistance RDS(on)1 = 80 mΩ MAX. (@ VGS = 10 V, ID = 10 A).
The TPC8214H, TPC8214, TPC-8214, 8214 is a N-Channel MOSFET TOSHIBA Field Effect Transistor Silicon N-Channel MOS Type (Ultra-High-Speed U-MOS)-SOP-8P.