UZ004 Line Resistance Kit – Isolation Board & Resistor Load
UZ004 Line Resistance Kit – Isolation Board & Resistor Load
The UZ004 Line Resistance Kit is a precision electronic testing accessory designed for USB-A port testers, including compatible models U3, L, PA2C, and the new A2Q series. Whether you're a hobbyist, electronics technician, or engineer, this kit provides everything you need for accurate 4-wire line resistance measurement, D+D- isolation, and resistive load testing in a compact, versatile form factor.
Made in Mainland China.
Key Features
- Broad Compatibility: Works with USB-A port testers including U3, L, PA2C, and A2Q models. Includes a UZ004 4-wire resistance measurement device, D+D- isolation board, and a resistive load board.
- D+D- Isolation Required: The D+D- isolation board is mandatory during measurement operations, ensuring signal integrity and accurate readings.
- USB Expansion Board: Functions as a USB-A expansion hub. Note: avoid connecting too many USB-A ports in parallel as this may cause insufficient current — USB-C ports are recommended for priority use.
- Dual 10W Resistors: Equipped with two 10W power resistors, a high-current range switch, support for 3 input ports, and range indicator LEDs for at-a-glance status monitoring.
- Parallel Port Design: All four ports on the board are connected in parallel and support external decoy triggers.
- Horizontal & Vertical Mounting: The expansion interface is available in both horizontal and vertical orientations to suit your workspace setup.
- ABS Construction: Durable ABS plastic housing ensures lightweight, sturdy everyday use.
⚠️ High Temperature Safety Notice
Each resistor is rated to a maximum of 10W. Under 5V / 1A operating conditions, the resistor reaches approximately 5W and the board will become very hot. Please handle with care and avoid direct contact with the resistors during and after operation to prevent burns.
Specifications
- Model: UZ004 Line Resistor Kit
- Material: ABS plastic
- Resistor Rating: 2 × 10W
- Input Ports Supported: 3
- Interface Options: Horizontal & Vertical USB-A expansion
- Origin: Mainland China
Package Contents
- Option A: 1 × UZ004 Device + 1 × Isolation Board + 1 × Resistor Load Board
- Option B: 1 × Resistor Load Board – Horizontal
- Option C: 1 × Resistor Load Board – Vertical
Notes
- Actual product color may vary slightly from images due to monitor brightness and lighting conditions.
- Please allow a manual measurement tolerance of ±2 cm for physical dimensions.
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Frequently Asked Questions
Q: What testers is the UZ004 Line Resistance Kit compatible with?
A: The UZ004 Line Resistance Kit is designed for use with USB-A port testers, specifically compatible with models U3, L, PA2C, and the new A2Q series. It includes the UZ004 4-wire resistance measurement device, a D+D- isolation board, and a resistive load board for comprehensive testing support.
Q: Is the D+D- isolation board required for use?
A: Yes, D+D- isolation is mandatory when performing measurements with this device. The isolation board ensures accurate signal separation and reliable resistance readings during operation.
Q: What is the difference between Option A, B, and C packages?
A: Option A is the complete kit, including the UZ004 device, isolation board, and resistor load board. Option B includes only the horizontal resistor load board, and Option C includes only the vertical resistor load board — ideal if you already own the UZ004 and need just the load board in your preferred orientation.
Q: How hot does the resistor load board get during use?
A: Each resistor is rated at 10W maximum. Under typical 5V / 1A conditions, power dissipation reaches approximately 5W, which causes the board to become very hot. Always allow adequate ventilation and avoid touching the resistors during or immediately after operation.