FNIRSI DSO TC3 Handheld Oscilloscope Transistor Tester 3in1

Meet the FNIRSI DSO-TC3, a compact 3-in-1 handheld instrument that combines a digital oscilloscope, transistor tester, and signal source into one portable tool. With a 500 kHz analog bandwidth and a real-time sample rate of 10 MSa/s, it delivers clear waveforms and accurate component testing on the go. The 2.4-inch color TFT display provides crisp visualization, while the built-in rechargeable lithium battery and USB-C charging keep you productive anywhere.

As an upgraded successor to the DSO-TC2, the DSO-TC3 enhances capacitance ESR detection, expands the function signal source output, improves bandwidth and sampling rate, and broadens input voltage and diode detection range. These improvements ensure more stable, reliable measurements across a wide range of electronics projects—from quick prototyping to on-site diagnostics. It supports automatic measurement, various trigger modes, and a broad set of tests for diodes, transistors (JFET, IGBT, MOSFET), SCR, TRIAC, capacitors, resistors, and more. It even decodes NEC infrared signals and records temperature and humidity with DHT11 and DS18B20 sensors.

Benefits & Tips

• Use the oscilloscope to quickly visualize waveforms with 500 kHz bandwidth and 10 MSa/s sampling—great for small circuits and hobby projects.
• Test diodes and transistors, including forward voltage, ESR, and switch characteristics, all in one handheld tool.
• Decode NEC infrared signals and monitor environmental conditions with built-in temperature and humidity sensors for comprehensive circuit testing.

Product Specifications

• Analog bandwidth: 500 kHz
• Real-time sample rate: 10 MSa/s
• Display: 2.4" TFT color screen
• Input resistance: 1 MΩ
• Input voltage range: 0–40 V
• Coupling: AC / DC
• Vertical sensitivity (x1): 10 mV – 10 V
• Horizontal time base: 1 µs – 10 s
• Trigger modes: Auto / Normal / Single
• Trigger types: Rising edge / Falling edge
• Waveform Freeze: Yes
• Automatic measurement: Yes
• Power: Rechargeable lithium battery; Charging via USB-C 5V
• Capacitor range: 25 pF – 100 mF
• Resistor range: 0.01 Ω – 50 MΩ
• Inductor: 10 µH – 1000 mH
• Diodes: Forward voltage drop < 4.5 V
• MOSFET types: JFET / IGBT / MOSFET
• SCR: Turn-on voltage < 5 V; gate trigger current < 6 mA
• TRIAC: Turn-on voltage < 5 V; gate trigger current < 6 mA
• DSS/DS18B20 sensors: DS18B20 0–85°C; DHT11 0–60°C / 5–95%
• Infrared remote decoding: NEC protocol
• Test voltage range: 400 V

Package includes:

• FNIRSI DSO-TC3 handheld 3-in-1 device

Warnings / Reminders

• Do not exceed the 400 V test voltage range.
• Ensure safe operating conditions; keep the device within 0–40 V input during measurements.
• Select the appropriate coupling (AC or DC) for accurate signal representation.
• Observe temperature and humidity sensor limits: DHT11 (0–60°C, 5–95%), DS18B20 (0–85°C).
• Recharge only with a proper USB-C 5V charger and undamaged cable.

Providing quality and trusted service since 2002 at intercyprus.com.