TH0320 Reference Resistance Standard
The TH0320 series is a high-precision, ultra-stable reference-grade standard resistor family engineered for demanding calibration and metrology environments. Built with advanced precision winding and stress-free structural techniques, the TH0320 delivers exceptional long-term stability, low temperature coefficient, and high repeatability under both AC and DC measurement conditions.
Designed for precision resistance calibration, current conversion, and traceability applications, the TH0320 can be paired with precision I/I conversion standards, high-accuracy digital multimeters, and metrology-grade voltmeters. Its extremely low power coefficient minimizes self-heating drift, ensuring accurate resistance values even under high operating currents.
With resistance values ranging from 1 Ω to 10 MΩ and well-defined operating limits, the TH0320 series is suitable for national metrology institutes, calibration laboratories, power test systems, and production-grade high-accuracy verification setups. Its robust mechanical design and 4-wire wiring method further ensure stable, low-EMF performance during long-term operation.
| Model | Nominal Resistance @ 23°C | Initial Deviation (ppm) | Measurement Uncertainty (ppm) | Annual Stability (ppm) | Temp. Coefficient (ppm/°C) | Wiring Method | Rated Power (W) | Power Factor (ppm) | Max Current (mA) | Max Voltage (V) |
|---|---|---|---|---|---|---|---|---|---|---|
| TH0320-1R | 1 Ω | 5 | 2.5 | 3 | 0.2 | 4W | 0.5 | 10 | 707 | 0.707 |
| TH0320-10R | 10 Ω | 5 | 2.5 | 3 | 0.2 | 4W | 0.1 | 10 | 100 | 1.00 |
| TH0320-100R | 100 Ω | 5 | 2.5 | 3 | 0.2 | 4W | 0.1 | 10 | 31.6 | 3.16 |
| TH0320-1kR | 1 kΩ | 5 | 2.5 | 3 | 0.2 | 4W | 0.1 | 10 | 10 | 10 |
| TH0320-10kR | 10 kΩ | 5 | 2.5 | 3 | 0.2 | 4W | 0.1 | 10 | 3.16 | 31.6 |
| TH0320-100kR | 100 kΩ | 5 | 2.5 | 3 | 0.2 | 2W | 0.1 | 10 | 1 | 100 |
| TH0320-1MR | 1 MΩ | 5 | 2.5 | 3 | 0.2 | 2W | 0.1 | 10 | 0.316 | 316 |
| TH0320-10MR | 10 MΩ | 10 | 5 | 6 | 0.2 | 2W | 0.1 | 10 | 0.1 | 1000 |
- Ultra-Stable Reference Design: Ensures minimal drift with excellent annual stability as low as ±3 ppm.
- Low Temperature Coefficient: Maintains precision in varying environmental conditions with ≤0.2 ppm/°C.
- Wide Operating Range: Available from 1 Ω to 10 MΩ for diverse laboratory and calibration applications.
- Precision 4-Wire Wiring Method: Provides accurate low-resistance measurements with reduced lead effects.
- High Power Handling: Rated for 2 W–4 W operation with minimal power coefficient impact.
- Suitable for AC & DC Systems: Ideal for resistance calibration, current conversion, and reference standard systems.
- Low Power Factor: Ensures reduced self-heating and measurement noise for metrology-grade stability.
- Long-Term Reliability: Engineered for calibration laboratories, national standards centers, and precision manufacturing lines.