{"product_id":"uz004-line-resistance-kit-isolation-board-resistor-load-1","title":"UZ004 Line Resistance Kit – Isolation Board \u0026 Resistor Load","description":"\u003cp\u003eThe \u003cstrong\u003eUZ004 Line Resistance Kit\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e 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.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eD+D- Isolation Required:\u003c\/strong\u003e The D+D- isolation board is mandatory during measurement operations, ensuring signal integrity and accurate readings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Expansion Board:\u003c\/strong\u003e 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.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual 10W Resistors:\u003c\/strong\u003e 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.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParallel Port Design:\u003c\/strong\u003e All four ports on the board are connected in parallel and support external decoy triggers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHorizontal \u0026amp; Vertical Mounting:\u003c\/strong\u003e The expansion interface is available in both horizontal and vertical orientations to suit your workspace setup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eABS Construction:\u003c\/strong\u003e Durable ABS plastic housing ensures lightweight, sturdy everyday use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e⚠️ High Temperature Safety Notice\u003c\/h2\u003e\n\u003cp\u003eEach resistor is rated to a maximum of \u003cstrong\u003e10W\u003c\/strong\u003e. Under 5V \/ 1A operating conditions, the resistor reaches approximately 5W and the board will become \u003cstrong\u003every hot\u003c\/strong\u003e. Please handle with care and avoid direct contact with the resistors during and after operation to prevent burns.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e UZ004 Line Resistor Kit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e ABS plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResistor Rating:\u003c\/strong\u003e 2 × 10W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Ports Supported:\u003c\/strong\u003e 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface Options:\u003c\/strong\u003e Horizontal \u0026amp; Vertical USB-A expansion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOption A:\u003c\/strong\u003e 1 × UZ004 Device + 1 × Isolation Board + 1 × Resistor Load Board\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOption B:\u003c\/strong\u003e 1 × Resistor Load Board – Horizontal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOption C:\u003c\/strong\u003e 1 × Resistor Load Board – Vertical\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eNotes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eActual product color may vary slightly from images due to monitor brightness and lighting conditions.\u003c\/li\u003e\n  \u003cli\u003ePlease allow a manual measurement tolerance of ±2 cm for physical dimensions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Products You May Like\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What testers is the UZ004 Line Resistance Kit compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the D+D- isolation board required for use?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between Option A, B, and C packages?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: How hot does the resistor load board get during use?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What testers is the UZ004 Line Resistance Kit compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}}, {\"@type\": \"Question\", \"name\": \"Is the D+D- isolation board required for use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, D+D- isolation is mandatory when performing measurements with this device. 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