- Function Transistor tester can be used for the measurement and analysis of patch components including NPN, PNP transistors, triodes, MOS and field effect transistors (FET), diodes, capacitors, resistors, inductors, and other components. This helps quickly identify part values, verify component health, and assist with troubleshooting and repair. - Professional tool An all in one instrument for electronics work: electronic component tester, LCR meter, and ESR meter for MOS PNP and NPN devices. - Size information The LCR P1 Transistor Capacitor Tester features a 1.44 inch full color screen and measures approximately 7.1 cm x 8.7 cm x 2.8 cm (2.80 inch x 3.43 inch x 1.10 inch). - Feature The replaceable patch seat design enables measurement of both tiny precision components and high power devices, providing versatility across a wide range of parts. - Use scenarios 1) In a repair shop to quickly identify and verify transistors, diodes, capacitors, and resistors on faulty boards to speed up diagnostics. 2) In a prototype or lab setting for component value checks and ESR measurements to ensure parts meet design specifications. 3) In student or training environments to learn transistor types, ESR behavior, and LCR characteristics with a single, portable tool.