| Series | Wattage | Ohms | Dimensions (in. / mm) | |
| Length | Diam. | A | B |
| 13 | 3 | 0.005-0.1 | 0.625/15.9 | 0.200/5.08 | 1.25/31.8 | 0.125/3.18 |
| 14 | 4.5 | 0.005-0.1 | 1.060/26.9 | 0.335/8.51 | 1.50/38.1 | 0.200/5.08 |
| 17 | 7 | 0.005-0.1 | 1.500/38.1 | 0.375/9.53 | 1.50/38.1 | 0.200/5.08 |
Ohmite's Four-terminal Current-sense Resistors are specifically designed for low-resistance applications requiring the highest accuracy and temperature stability. This four-terminal version of Ohmite's 10 Series resistor is specially designed for use in a Kelvin configuration, in which a current is applied through two opposite terminals and sensing voltage is measured across the other two terminals.
The Kelvin configuration enables the resistance and temperature coefficient of the terminals to be effectively eliminated. The four terminal design also results in a lower temperature coefficient of resistance and lower self-heating drift which may be experienced on two-terminal resistors. The requirement to connect to the terminals at precise test points is eliminated, allowing for tighter tolerancing on the end application.
FEATURES
- Ideal for current sensing applications
- 1% Tolerance standard, others available
- Low Inductance (non-inductive below 0.25 ohms)
- Tinned Copper terminals
- RoHS Compliant
SPECIFICATIONS
Material
- Terminals: Tinned Copper terminals
- Encapsulation: Silicone Molding Compound
- Derating: Linearly from 100% @ +25°C to 0% @ +200°C.
Electrical
- Resistance Range: 0.005 ohms to 0.100 ohms standard
- Standard Tolerance: ±1%; others available
- Operating Temperature Range: -55°C to +200°C
- Temperature Coefficient of Resistance, 0°C to 85°C: ≥0.015 ohms: ±50 PPM/°C <0.015 ohms: ±100 PPM/°C
- Environmental Performance: Exceeds the requirements of MIL-PRF-49465
- Power rating: Based on 25°C free air rating.
- Overload: 5 times rated wattage for 5 seconds
- Dialectric withstanding voltage: 1500 VAC for 4.5 and 7 watt1000 VAC for 3 watt
- Insulation resistance: Not less than 1000 M ohms
- Thermal EMF: Less than ±2µV/°C
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FEATURES
Standard part numbers and availability
