Ceramic resistors are manufactured from a sintered body of ceramic material, with conductive particles distributed throughout the matrix, to produce a resistor that is 100% active and non-inductive.  Ceramic resistors are chemically inert.  They can withstand high-energy and high-voltages at high temperatures, such as those encountered in the protection of high voltage surge equipment, discharge banks, and in high frequency radiation suppression.  Electrical characteristics are as follows:

Resistivity Range

0.8 to 4,000 Ohm-in

2 to 10,000 Ohm-cm

Maximum Steady State Power Density
12 watts/in³
0.75 watts/cm³
Maximum Transient Energy Density

4,920 joules/in³
300 joules/cm³

Maximum Voltage Gradient

10 kV/in
  4 kV/cm

Maximum Rate of Power Injection
150,000 watts/sec/in³
Maximum Rate of Current Injection
1,000 amps/in² - Contact Area
Maximum Operating Temperature
250° C
Voltage Coefficient
- 0.3% to - 7.5% /volt
Temperature Coefficient
- 0.03% to - 0.16%/°C
Heat Dissipation
2.86 watts/in²
Thermal Conductivity
0.03 cal/cm²
Specific Heat
0.2 cal/gm/°C
Coefficient of Thermal Expansion
4 x 10-6
Heat Capacity
8.7 cal/°C/in³
Density (Nominal)
2.55 g/cc

US Resistor, Inc.

1016 DeLaum Road
St. Marys, PA 15857-1059
Phone: (814) 781-7679
Fax: (814) 834-9370