LCR-T5 Transistor & Component Tester (ESR, MOSFET, Diode)
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Prices updated: 13 Oct 2026
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About this product
A handheld tester that identifies and measures passive and semiconductor components, including resistors, capacitors, inductors, ESR, diodes, NPN and PNP transistors, N and P-channel MOSFETs and thyristors. Results appear on an LCD, and the internal lithium battery can be charged over USB. It is useful for checking parts before using them on a board.
Specifications
- Display
- LCD
- Power
- USB charging, internal lithium battery
- Tests
- Resistors, capacitors, inductors, ESR, diodes, NPN/PNP transistors, N/P-channel MOSFET, thyristors
- Component detection
- Automatic, including leaded components
- Power voltage detection
- Yes
- Weight
- About 96 g
Frequently asked questions
Do I need to remove components from the circuit before testing?
Yes, for accurate readings. Remove the component from the board or power down the circuit, because parallel parts on the board will affect resistance, capacitance and transistor measurements.
How do I connect a transistor or MOSFET to the tester?
Insert the component's leads into the test sockets in any order. The tester detects the component type and pin arrangement automatically for supported parts, and the result is shown on the LCD.
