Components

onsemi / Fairchild -300V -500mA ultra-high-voltage small-signal PNP BJT in a TO-92 package, serving as the premier high-side switching partner to the MPSA42 for Nixie tube displays, neon indicators, and audio VAS stages.

Standard TO-92 plastic package NPN silicon switching BJT rated for 40V collector-emitter voltage (VCEO) and 600 mA collector current (IC) for relays, buzzers, and DC motors.

onsemi / Fairchild plastic TO-92 packaged -60V -600mA general-purpose high-speed PNP switching BJT, serving as the breadboard-friendly equivalent of the 2N2907A metal can and complement to PN2222A.

onsemi / Intersil 60V 30A N-channel logic-level MegaFET power MOSFET in a TO-220AB package with 47mΩ on-resistance at 5V VGS, historically popular in early Arduino and SparkFun motor driver tutorials.

Generic TO-92 plastic package low-voltage high-current NPN silicon BJT rated for 25V collector-emitter voltage (VCEO) and 700 mA collector current (IC) for small motors and relays.

Micro Commercial Components / generic low-voltage high-current PNP silicon BJT in TO-92 package rated for -25V VCEO and -700mA collector current, complementary to S8050 in hobby starter kits.

STMicroelectronics 60V 16A N-channel STripFET II power MOSFET in a TO-220 package, popular in European maker projects and educational kits for 12V/24V DC motor and solenoid switching.

STMicroelectronics / ON Semiconductor high-gain (hFE >= 1000) 60V, 5A NPN Darlington power transistor in TO-220 package, used for driving relays, solenoids, and DC motors directly from MCU logic pins.

STMicroelectronics / onsemi 80V 5A high-gain (hFE >= 1000) NPN Darlington power transistor in a TO-220 package with integrated base-emitter resistors and damper diode for 24V/48V relay and motor driving.

STMicroelectronics / onsemi 100V 5A high-gain (hFE >= 1000) NPN Darlington power transistor in a TO-220 package, widely used for driving 24V/48V CNC stepper motors, solenoids, and heavy inductive loads from MCU pins.

STMicroelectronics / onsemi -100V -5A high-gain (hFE >= 1000) PNP Darlington power transistor in a TO-220 package, serving as the high-side complementary partner to the TIP120/TIP122 for full H-bridge motor drivers.

STMicroelectronics / ON Semiconductor 100V, 3A NPN power BJT in TO-220 package, widely used in linear power supplies, audio power amplifiers, and medium-power DC load switching.

STMicroelectronics / ON Semiconductor -100V, -3A PNP power BJT in TO-220 package, complementary to TIP31C for linear power supplies, audio power amplifiers, and high-side load switching.

STMicroelectronics / onsemi 100V 6A 65W silicon power NPN BJT in a TO-220 package, the higher-current big brother to the TIP31C for linear power supplies, audio power amplifiers, and motor switching.

STMicroelectronics / onsemi -100V -6A 65W silicon power PNP BJT in a TO-220 package, serving as the official complementary PNP partner to the TIP41C for discrete audio amplifiers and power supply series-pass stages.

Microchip (Supertex) / Siliconix 60V 230mA small-signal N-channel DMOS FET in a TO-92 package, serving as an ultra-fast sub-10ns logic-level switching alternative to the 2N7000.