LCR-T4 Transistor Tester Meter — ESR, Capacitance, Diode, MOSFET, LCD Display

LCR-T4 Multi-Function Transistor & Component Tester — ESR, Capacitance, MOSFET, LCD

The LCR-T4 is an automatic component identification and measurement tool that tests virtually any passive or active electronic component in seconds. Insert the component into the ZIF socket or test clips, press the button, and the LCD display shows the component type, pinout, and key parameters — no manual range selection required.

Key Specifications

Parameter	Value
Display	128×64 LCD (ST7565 or equivalent)
Supply Voltage	9V (6F22 battery or DC jack)
Transistor Test	NPN, PNP (BJT) — hFE, VBE
MOSFET/JFET Test	N/P-Channel — VGS(th), Ciss
Diode Test	VF, reverse breakdown voltage
Capacitance Range	25pF – 100mF
ESR Measurement	Yes (for capacitors)
Inductance Range	0.01mH – 20H
Resistance Range	0.1Ω – 50MΩ
Auto Power-Off	Yes (~60 seconds)

What LCR-T4 Can Test

• BJT Transistors — NPN/PNP identification, hFE (gain), VBE, pinout (B/C/E)
• MOSFETs & JFETs — N/P-Channel, gate threshold voltage VGS(th), input capacitance
• Diodes & Zener Diodes — Forward voltage, Zener breakdown voltage
• Capacitors — Capacitance (25pF–100mF) + ESR (equivalent series resistance)
• Inductors — Inductance value and series resistance
• Resistors — 0.1Ω to 50MΩ
• Thyristors (SCR) & TRIACs — Basic identification

Why Choose LCR-T4?

• Fully Automatic — Auto-detects component type and displays pinout; no manual mode selection
• ESR Measurement — Identifies failing electrolytic capacitors by high ESR before they cause circuit failure
• Pinout Display — Shows which pin is Base/Collector/Emitter or Gate/Drain/Source
• Auto Power-Off — Extends battery life with automatic shutdown after ~60 seconds
• Acrylic Case Included — Protects the PCB and provides a professional appearance

Typical Applications

• Identifying unknown transistors from salvaged PCBs
• Verifying component values before soldering
• Testing electrolytic capacitors for ESR degradation
• Checking MOSFET gate threshold in power electronics repair
• Electronics lab and workshop bench tool
• Teaching component identification in STEM education

FAQ

Q: Can LCR-T4 test SMD components?
A: Yes — use the test clip leads (included) to probe SMD components directly on the PCB or in a component holder.

Q: What battery does LCR-T4 use?
A: 9V 6F22 (PP3) battery. Some versions also accept 6–12V DC via a barrel jack.

Package Contents

• 1× LCR-T4 Component Tester (assembled, with acrylic case)
• 1× ZIF Test Socket
• Test clip leads

Enjoy free standard shipping on all orders over $199 USD. Orders are processed within 1–2 business days.

Not satisfied? Return any item within 90 days of purchase for a full refund or exchange. Items must be in original condition.

We are committed to quality, reliability, and customer satisfaction. Every product is carefully selected and tested to meet the highest standards.