10 Series
Two and Four Terminal Axial
Ohmite’s 10 series current sense resistors are available in a standard two-terminal axial and a four-terminal Kelvin design. 1% tolerances are standard with a fixed measuring point. The element design is non-inductive below 0.25 ohms.
Two Terminal Axial
Features
- Ideal for current sensing applications
- 1% Tolerance standard, others available
- Fixed resistance measuring point "M"
- Low inductance (non-inductive below 0.25Ω)
- RoHS compliant product available; add "E" suffix part number to specify
Specifications
Series | Wattage | Ohms |
12 | 2 | 0.005 - 0.10 |
13 | 3 | 0.005 - 0.20 |
15 | 5 | 0.005 - 0.25 |
Characteristics
Terminals | Solder-plated copper terminals or copper-clad steel depending on ohmic value. RoHS solder is 96% Sn, 3.5% Ag, 0.5% Cu |
Encapsulation | Silicone molding compound |
Derating | Linearly from 100% @ +25°C to 0% at +275°C |
Tolerance | ±1% standard; others available |
Power Rating | Based on 25°C free air rating |
Overload | 5 times rated wattage for five seconds |
Dielectric Withstanding Voltage | 100 VRMS for 3 and 5 watt; 500 VRMS for 2 watt |
Insulation Resistance | Not less than 1000MΩ |
Thermal EMF | Less than ±2µV/°C |
Temperature Range | -55°C to 275°C |
Additional Specification Tables
Four Terminal Axial
14FPR size has been discontinued February 2021
Ohmite’s Four-terminal Current-sense design is 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 with 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 0.25Ω)
- Tinned Copper Leads
- RoHS Compliant
Specifications
Series | Wattage | Ohms |
13 | 3 | 0.005-0.1 |
14 | 4.5 | 0.005-0.1 |
17 | 7 | 0.005-0.1 |
Characteristics
Terminals | Tinned Copper Leads |
Encapsulation | Silicone molding compound |
Derating | Linearly from 100% @ +25°C to 0% at +200°C |
Resistance Range | 0.005Ω - 0.100Ω standard |
Standard Tolerance | ±1%; others available |
Operating Temperature Range | -55°C to +200°C |
Temperature Coefficient of Resistance | (0°C to 85°C)≥0.015Ω:±50 PPM/°C; <0.015Ω: 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 five seconds |
Max. Current | 22 amps |
Dielectric Withstanding Voltage | 1500 VAC for 4.5 and 7 watt; 1000 VAC for 3 watt |
Insulation Resistance | Not less than 1000 MΩ |
Thermal EMF | Less than ±2µV/°C |