10 Series

10 Series

Axial Wire Element Current Sense

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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