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HT Series, Thick Film Tubular type Non-Inductive Resistors for Ultra High Voltage and High Wattage Requirements |
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Ultra High Voltage, High Frequency Resistors, R-Value up to 10T
Terminations Available with Std. Caps or Corona Caps
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| Micro-Ohm offers the HT series to meet a general set of requirements Ultra high voltages at reasonable prices. HT series are available with Corona Caps or Standard Caps. A wide range of R-Values, tolerances, and TCR's are available. |
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Resistance Tolerances offered from 1% to 10% |
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Resistance Range 10Ω to 10T |
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TCR: 40ppm/°C to 200ppm/°C |
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Power Ratings up to 150 watts |
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Load Life Stability of 1.0% per 1000 hours |
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Various Models with Voltage Ratings up to 800kV in oil, 150kV in free air. |
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| Application Guide |
| Automated Test (ATE) |
Medical (Imaging) |
Ion Source |
| Chromatography (Gas) |
Medical (PET, CT) |
Medical (Radiation Therapy) |
| Military, Radar |
Plasmas, Lasers |
Measurements (High Voltage) |
| Capacitor Charging |
Microwave (Klystron) |
Medical (Blood Analysis) |
| Corona Generators |
Multichannel Analyzers |
Ozone Generating |
| Dectors Nuclear |
Gamma Cameras |
Electron Beam Testing |
| Surface Analysis |
CRT, X-Ray, MRI |
Electrophoresis |
| Image Intensifier |
Piezo, Focusing (Poling) |
High Voltage Dividers |
| Stress Testing |
Agricultural Sensors |
Ion Beam |
| Arc Furnace Damping |
High Voltage Snubbers |
Pulse Forming Networks |
| Energy Research |
EMI
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Tube Arc Protection |
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Specifications |
| Dimensions |
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Resistance Tolerance: 1%,2%, 5%, 10% |
| Temperature Coefficient: Std. 100ppm/°C referenced to 25°C, from -15°C to +105°C. Other TCR on request. |
Overload: 5 times rated power with applied voltage not to exceed 1.5 times Max. continuous operating voltage for 5 seconds, overload/overvoltage  R, 0.50% max. |
| Thermal Shock: Mil-Std-202, Method-107, Cond. C R, 0.50% max. |
| Load Life: 1,000 hours at rated power R 1.00% typ. |
Moisture Resistance: Mil-Std-202, Method-106,
R, 0.50% |
| Insulation Resistence: 10,000 Megohms Min. |
| Terminations: Al Alloy Cap, Bronze Corona Cap, Silver Metalized Terminals or Tinned Plated Steel Lugs |
| Encapsulation: Glass Coat std. Epoxy Coat available |
Model
No. |
Dimensions in milimeters |
| L |
B |
D |
Dia. with
Corona Ring |
W |
T |
| HT20 |
158 ±1.5 |
14 ±1 |
15 ±1 |
N/ A |
10 ±1.5 |
M4 |
| HT35 |
110 ±1.5 |
31 ±1 |
33 ±0.5 |
43 |
18 ±0.5 |
M6 |
| HT50 |
160 ±1.5 |
31 ±1 |
33 ±0.5 |
43 |
18 ±0.5 |
M6 |
| HT70 |
210 ±1.5 |
31 ±1 |
33 ±0.5 |
43 |
18 ±0.55 |
M6 |
| HT100 |
310 ±1.5 |
31 ±1 |
33 ±0.5 |
43 |
18 ±0.5 |
M6 |
| HT150 |
310 ±1.5 |
40 ±1 |
45 ±1.0 |
59 |
21 ±0.5 |
M6 |
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Model
No. |
Wattage
@ 50°C |
Max. Continuous
Oper. Volt [kV]
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Single Impulse Volt*
1.2/50µs [kV] |
Std. R-
value (Ω) |
Low Extended
R-value (Ω)
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High
Extended
R-value (Ω)
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| HT20 |
20 |
40 |
77 |
1K~1G |
20R~0.9K |
1.1G~10T |
| HT35 |
30 |
30 |
50 |
1K~1G |
10R~0.9K |
1.1G~10T |
| HT50 |
50 |
48 |
77 |
1K~1G |
10R~0.9K |
1.1G~10T |
| HT70 |
70 |
65 |
100 |
1K~1G |
10R~0.9K |
1.1G~10T |
| HT100 |
100 |
100 |
150 |
1K~1G |
10R~0.9K |
1.1G~10T |
| HT150 |
150 |
100 |
150 |
1K~1G |
10R~0.9K |
1.1G~10T |
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* Specification for 20kΩ ~ 1000MΩ only
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Purpose of Corona Ring End Caps:
The corona ring end cap provides additional protection to the electrical field during pulsing or high voltage. |
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| ORDERING INFORMATION |
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| Example: 70W 1Meg 5% |
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HT70*
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1M
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J
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Type
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Resistance
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Tolerance
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| *for corona end cap add "C" after P/N |
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F = 1%
G = 2%
J = 5%
K = 10%
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Derating Curve
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