Y002410R0000B9L

The H series resistors are oil-filled, hermetically sealed ultra precision resistors and are used as secondary standards for metrology applications.

The hermetic sealing eliminates the ingress of moisture and oxygen, while the oil acts as a thermal conductor, thus eliminating the long-term degradation elements of unsealed resistors, while at the same time allowing the device to accept short periods of overload without degradation.

With accuracies of 0.001 %, a resistance range from 5 O to 1.84 MO, and long term shelf life of less than 2 ppm, these devices are virtually secondary standards that can be carried in sets for daily or periodic calibration of factory measurement equipment.

The H series is available with laboratory and metrology level precision and long-term stability with additional in-house oriented processes such as: chip stabilization, special TCR plotting, additional treatments for ultra stability and special post manufacturing operations (PMO).

• Temperature coefficient of resistance (TCR): ± 2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.). For ultra high performances (instrumentation and metrology)
• Resistance range: 5 O to 1.84 MO (higher or lower values of resistance available)
• Power rating: 0.3 W to 2.5 W at + 25 °C
• Tolerance: to ± 0.001 % (10 ppm)
• Load life stability to ± 0.002 % (20 ppm) at 25 °C, 2000 h at rated power
• Load life stability can be considerably improved through in-house stabilization
• Shelf life stability: ± 2 ppm for at least 6 years (unaffected by humidity)
• Electrostatic discharge (ESD) up to 25 000 V
• Rise time: 1 ns effectively no ringing
• Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value)
• Current noise: 0.010 µVRMS/V of applied voltage (< - 40 dB)
• Thermal EMF: 0.05 µV/°C typical
• Voltage coefficient: < 0.1 ppm/V
• Non-inductive: < 0.08 µ