The HA17741/PS is an internal phase compensation high-performance operational amplifier, that is appropriate for use in a wide range of applications in the test and control fields chips DIP-8 Pins Package.
The 2SD1947, 2SD-1947, D1947, 1947 is a 100V 10A NPN Silicon Transistor, TO-220F Package , Applications High Gain current, low Uce Voltage Saturation, Integrated Diode, Manufactured By TOSHIBA.
The 2SK2462, 2SK-2462, K2462, 2462 is a 100V 15A 30W 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 = 10A).
The BD243C is a 6A, 100V NPN Bipolar Power Transistor is designed for use in general purpose amplifier and switching applications. BD243B, BD243C (NPN); BD244B, BD244C (PNP) are complementary devices.