60 Series
Four Terminal Bare Element
Ohmites Four Terminal Bare Element Resistors provide
ultra low resistance values (to 0.0005) for relatively
high current requirements, with the advantages of a
Kelvin configuration and PC Board mounting capability.
These shunt resistors are specifically designed for low
resistance applications requiring the highest accuracy
FeatureS
and temperature stability. This Four Terminal version of
Ohmites 60 Series Resistor is specially designed for use
Ideal for current sensing applications
in a Kelvin configuration, in which a current is applied
1% tolerance standard, others available
through two opposite terminals and sensing voltage is
Low inductance (non-inductive below
measured across the other two terminals.
0.05)
The Kelvin configuration enables the resistance and
temperature coefficient of the terminals to be effectively
RoHS compliant
eliminated. The four terminal design also results in a
Radial, self-supporting, design is ideal for
lower Temperature Coefficient of Resistance and lower
PC board mounting
self heating drift which may be experienced on two ter-
High Power-to-size ratio
minal resistors. The requirement to connect to the ter-
minals at precise test points is eliminated, allowing for
Decimal marked, silicone coated (650
tighter tolerancing on the end application.
Series only)
SerieS SpeciFicationS
Series Wattage Resistance Range ()* Amps max. Tolerance*
610 1W 0.002-0.050 32 1%
650 5W 0.002-0.005 100 1%
*Standard; others available
characteriSticS
Terminals Tinned Copper Derating
Resistive element Manganin Alloy
100
Operating Temperature Range -55C to +275C.
80
Temperature Coefficient of Resistance 0C to 85C: 50 PPM/C, .015 and higher;
60
100 PPM/C, .015 and lower
Environmental Performance Exceeds the requirements of MIL-PRF-49465
40
Power rating Based on 25C free air rating
20
Overload 5 times rated wattage for 5 seconds
0
0 25 75 125 175 225 275
Less than 3V/C
Thermal EMF
Ambient Temperature, C
Derating Linearly from 100% @ +25C to 0% @ 275C
dimenSionS orderinG inFormation
610 Series (1 watt)
Stdandard part numbers
Ohmic 610 Series 650 Series
Terminals
0.100" 0.200" .015
value 1 watt 5 watt
P = 4 terminals RoHS Compliant
(typ. to bend)
0.002 610FPR002E 650FPR002E
1.100" .010 0.005 610FPR005E 650FPR005E
610FPR050E
0.200" .010
0.010 610FPR010E
0.040" (18AWG)
0.015 610FPR015E
60 Series Tolerance Ohm Value
0.020 610FPR020E
F= 1% Example:
650 Series (5 watt)
Wattage D= 0.5% R050= 0.05
0.025 610FPR025E
10 = 1.0
0.036 610FPR036E
1.400" max.
50 = 5.0
0.050 610FPR050E
0.450"
0.180"
max.
0.100"
(typ. tinned
(typ. to bend)
surface)
1.000" .010
0.250" .010
0.081" (12AWG)
48 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com [email protected]
Percent Rated Watts