UHR 4-5020D is a resistor produced by Willow Technologies. Its rated resistance is 1.0-40 ohms, the rated power is 8W, the temperature coefficient is ±5ppm/K, and the rated temperature range is -55-155°C.
The UHR 4-5020D is a special resistor offered by Willow Technologies. It is RoHS‑compliant and available in resistance values from 1 Ω to 40 Ω with tight tolerances of ±0.1 % and a temperature coefficient of +5 ppm/K.
The datasheet lists detailed electrical parameters, mechanical dimensions, and ordering information, including part numbers, material construction, and contact details for Willow Technologies Ltd.
| Resistance Range | 1.0 to 40 Ohms |
|---|---|
| Pulse Energy | 1 kJ/1 s |
| Thermal Resistance (Rthj‑c) | 10 KAV |
| Tolerance | 0.1 % |
| Stability | 0.1 % |
| Temperature Coefficient | +5 ppm/K (‑55 °C to 155 °C) |
| Insulation Resistance | 3 kVDC |
| Maximum Current | 3 A |
| Operating Temperature Range | -55 °C to 155 °C |
| Resistor Material | NiCr‑Foil |
| Substrate | AIN |
| Housing | Aluminum |
| Connector Material | Cu tinned |
| Terminals | 4 |
| Dimension A (length) | 19.50 mm |
The resistor can be ordered with resistances from 1.0 Ω to 40 Ω.
It has a temperature coefficient of +5 ppm/K over a range of –55 °C to 155 °C.
The device has four terminals.
The resistor can handle up to 3 A of current.