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Compact USB tester with 1.77 inch colour screen, USB-A, Micro-USB and Type-C ports

FNIRSI FNB48P USB Tester 24V 6.5A Electrical System Tool

SKU CH-XQMC-426FQ

Measures USB voltage, current, power, capacity and temperature up to 24 V 6.5 A with a 1.77-inch colour screen, multi-protocol trigger detection and E-Marker cable reading

  • FeaturesUSB Tester, CE, Corded Electric, false
  • Weight0.1 pounds
  • Sports Team1 Piece
  • TypeMultimeters, Tach & Dwell Meters
  • 77-inch colour TFT LCD shows voltage, current and power at a glance
  • 16-bit ADC delivers 0.00001 resolution for precise voltage, current, power, resistance and capacity readings
  • Triggers and detects QC 2.0/3.0, FCP/SCP, AFC, PD 2.0/3.0, VOOC/WARP and Super VOOC fast-charge protocols
  • Reads E-Marker and DASH cable chips plus wire resistance via differential-pressure method
  • Operates from 4 to 24 V at up to 6.5 A for chargers, power banks and USB devices

USB-C power analyser for engineers

The FNIRSI FNB48P USB tester integrates USB-A, Micro-USB and Type-C ports with a 1.77-inch colour TFT display that auto-rotates via a gravity sensor. An external 16-bit ADC and PD protocol chip measure voltage, current, power, resistance, capacity, temperature and D+/D- voltage to 0.00001 resolution. It triggers and detects QC2.0, QC3.0, FCP, SCP, AFC, PD2.0, PD3.0, VOOC, WARP and Super VOOC 1.0 and 2.0 protocols. APP and PC host software provide four functional curve displays.

Sustained load behaviour with ripple capture

Under continuous operation the tester logs 10 switchable data sets of capacity, energy and time while recording one voltage-current curve. Sampling scales from 2 sps to 100 sps for low-frequency waveforms and reaches 3.2M sps for high ripple drawing, letting engineers observe stability over long charge cycles rather than brief peaks. Onboard temperature monitoring and internal-resistance measurement by differential pressure add thermal and cable-health insight during extended sessions. The 24V 6.5A rating covers most USB-C power delivery scenarios.

Replaces basic multimeters and single-port testers

This unit consolidates a multimeter, protocol trigger box and cable E-Marker reader into one pocket device, removing the need to swap leads between USB-A and USB-C loads. The jump is worth it when debugging fast-charge negotiation, verifying cable chips or capturing ripple that a simple volt-amp meter cannot show. Buyers who need automated production-line logging or isolation-rated protocol conversion will require dedicated bench gear instead.

Highlights

  • 77-inch colour TFT LCD shows voltage, current and power at a glance
  • 16-bit ADC delivers 0.00001 resolution for precise voltage, current, power, resistance and capacity readings
  • Triggers and detects QC 2.0/3.0, FCP/SCP, AFC, PD 2.0/3.0, VOOC/WARP and Super VOOC fast-charge protocols
  • Reads E-Marker and DASH cable chips plus wire resistance via differential-pressure method
  • Operates from 4 to 24 V at up to 6.5 A for chargers, power banks and USB devices

Specifications

BrandFNIRSI
FeaturesUSB Tester, CE, Corded Electric, false
Weight0.1 pounds
Sports Team1 Piece
TypeMultimeters, Tach & Dwell Meters

Questions about this item

Does the FNB48P generate noticeable heat or noise when monitoring a 24 V 6.5 A load continuously?

The tester is a corded electric instrument with no moving parts, so it produces no fan noise and negligible heat during extended high-current measurements.

Which cables or adapters must I already own to connect the FNB48P to a USB-C power source and a device under test?

The unit integrates USB-A, Micro-USB and Type-C ports, so only the cable that fits your charger and the cable to your load are required — no extra adapters.

Will the FNB48P correctly display fast-charge parameters when used with an older QC 2.0 charger and a legacy Micro-USB phone?

Yes, it supports QC 2.0/3.0 trigger detection alongside FCP, SCP, AFC, PD 2.0/3.0 and VOOC protocols, so legacy quick-charge handshakes are captured and shown on the 1.77-inch colour screen.

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