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 requir-
ing 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 terminal
resistors. The requirement
to connect to the terminals
at precise test points is elimi-
nated, allowing for tighter toler-
ancing on the end application.
100
Percent Rated Watts
80
60
40
20
0
0 25
75
125
175
225
275
FEATURES
• Ideal for current sensing applica-
tions
• 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)
Four Terminal Bare Element
610 Series (1 watt)
0.100"
(typ. to bend)
0.200"
±.015
0.200"
±.010
650 Series (5 watt)
60 Series
1.100"
±.010
0.040" (18AWG)
SPECIFICATIONS
Material
Terminals:
Tinned Copper
Resistive element:
Manganin
Alloy
Electrical
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
1.400" max.
0.450"
max.
0.100"
(typ. to bend)
0.250"
±.010
0.180"
(typ. tinned
surface)
1.000"
±.010
0.081" (12AWG)
Series
Wattage
Resistance
Range (Ω)*
Amps
max.
Tolerance*
610
1W
0.002-0.050
650
5W
0.002-0.005
*Standard; others available
32
100
1%
1%
O R D E R I N G I N F O R M AT I O N
Terminals
Blank = 2 terminals
P
= 4 terminals
RoHS Compliant
STD. PART NUMBERS
Ohmic
value
0.002
0.005
0.010
0.015
0.020
0.025
0.036
0.050
610 Series
1 watt
610FPR002E
610FPR005E
610FPR010E
610FPR015E
610FPR020E
610FPR025E
610FPR036E
610FPR050E
650 Series
5 watt
650FPR002E
650FPR005E
–
–
–
–
–
–
610FPR050E
60 Series
Ambient Temperature,
°C
Tolerance Ohm Value
F = 1%
Example:
Wattage
D = 0.5% R050= 0.05Ω
10 = 1.0
50 = 5.0
Check product availability at
www.ohmite.com
Ohmite Mfg. Co.
1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
19
OHMITE [ OHMITE MFG. CO. ]
