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48
60 Series
Four Terminal Bare Element
Series Wattage Resistance Range (Ω)* Amps max. Tolerance*
610 1W 0.002-0.050 32 1%
650 5W 0.002-0.005 100 1%
*Standard; others available
Terminals
Tinned Copper
Resistive element
Manganin Alloy
Operating Temperature Range
-55˚C to +275˚C.
Temperature Coefficient of Resistance
0˚C to 85˚C: ±50 PPM/˚C, .015Ω and higher;
±100 PPM/˚C, .015Ω and lower
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
Thermal EMF
Less than ±3µV/˚C
Derating
Linearly from 100% @ +25°C to 0% @ 275°C
1.100" ±.010
0.040" (18AWG)
1.000" ±.010
0.081" (12AWG)
1.400" max.
0.200" ±.015
0.100"
(typ. to bend)
0.200" ±.010
0.100"
(typ. to bend)
0.450"
max.
0.250" ±.010
0.180"
(typ. tinned
surface)
610 Series (1 watt)
650 Series (5 watt)
610FPR050E
60 Series
Wattage
10 = 1.0
50 = 5.0
Tolerance
F=1%
D=0.5%
Ohm Value
Example:
R050= 0.05Ω
Terminals
P = 4 terminals
RoHS Compliant
100
Percent Rated Watts
Ambient Temperature, ϒC
60
20
0
0 175
80
40
25 75 125 225 275
Stdandard part numbers
Ohmic 610 Series 650 Series
value 1 watt 5 watt
0.002 610FPR002E 650FPR002E
0.005 610FPR005E 650FPR005E
0.010 610FPR010E –
0.015 610FPR015E –
0.020 610FPR020E –
0.025 610FPR025E –
0.036 610FPR036E –
0.050 610FPR050E –
Derating
Ohmite’s Four Terminal Bare Element Resistors provide
ultra low resistance values (to 0.0005Ω) 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
and temperature stability. This Four Terminal version of
Ohmite’s 60 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 ter-
minal resistors. The requirement to connect to the ter-
minals 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
0.05Ω)
• RoHS compliant
• Radial, self-supporting, design is ideal for
PC board mounting
• High Power-to-size ratio
• Decimal marked, silicone coated (650
Series only)
DIMENSIONS
SERIES SPECIFICATIONS
CHARACTERISTICS
ORDERING INFORMATION
