FEATurES
• Ideal for current sensing applica-
tions
• 1% Tolerance standard, others
available
• Fixed resistance measuring
point “M”
• Low inductance (non-inductive
below 0.25Ω)
• RoHS compliant product avail-
able; add “E” suffix to part num-
ber to specify
700
600
500
ppm/°C
400
300
200
100
0
0
10
20
30
Milliohms
40
50
Temperature
Coefficient of
Resistance
2 watt
3 watt
5 watt
SpECiFiCATiOnS
Material
Terminals:
Solder-plated copper
terminals or copper clad steel
depending on ohmic value.
RoHS solder composition is
96% Sn, 3.5% Ag, 0.5% Cu
Encapsulation:
Silicone molding
compound.
Derating
Linearly from 100% @ +25°C to
0% @ +275°C.
Electrical
Tolerance:
±1% standard.
Others available.
Power rating:
Based on 25°C
free air rating.
Overload:
5 times rated wattage
for 5 seconds.
Dielectric withstanding voltage:
1000 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.
Electrical
Resistance Range:
0.005Ω to
0.100Ω
standard
Standard Tolerance:
±1%; oth-
ers 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 5 seconds
Max. Current:
22 amps
Dialectric 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
Axial Wire Element
Current Sense
1.562
±0.062
/
39.7
±1.6
L max.
D
±.010
/
±0.3
d
±.002
/
±0.05
10 Series
M
Two Terminal Axial
Dimensions (in. /
mm)
Series Wattage Ohms
Length
Diam.
“M” Lead ga.
12
2 0.005-0.10 0.416 /
10.6
0.094 /
2.4
1.156 /
29.4
20
13
3 0.005-0.20 0.570 /
14.5
0.205 /
5.2
1.310 /
33.3
20
15
5 0.005-0.25 0.935 /
23.8
0.330 /
8.4
1.675 /
42.5
18
A (min.)
L +.015 /
+0.4
D +.015 /
+0.4
B
±.010
/
±
0.03
FEATurES
• Ideal for current sensing applica-
tions
• 1% Tolerance standard, others
available
• Low Inductance (non-inductive
below 0.25Ω)
• Tinned Copper Leads
• RoHS Compliant
0.032
±.002
0.81
±
.05
(20 AWG)
Four Terminal Axial
Dimensions (in. /
mm)
Series Wattage Ohms
Length
Diam.
A
B
13
3 0.005-0.1 0.625/15.9 0.200/5.08 1.25/31.8 0.125/3.18
14
4.5 0.005-0.1 1.060/26.9 0.335/8.51 1.50/38.1 0.200/5.08
17
7 0.005-0.1 1.500/38.1 0.375/9.53 1.50/38.1 0.200/5.08
SpECiFiCATiOnS
Material
Terminals:
Tinned Copper Leads
Encapsulation:
Silicone Molding
Compound
Derating
Linearly from 100% at +25˚C to
0% at +200˚C
Ohmite’s Four-terminal Current-sense Resistors are 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 tempera-
ture coefficient of the terminals to be effectively eliminated. The
four terminal design also results in a lower temperature coef-
ficient of resistance and lower self-heating drift which may be
experienced on two-terminal resistors. The requirement to con-
nect to the terminals at precise test points is eliminated, allowing
for tighter tolerancing on the end application.
o r d e r i n g i n f o r m at i o n
Wattage
Terminals
Blank = 2 terminals
P
= 4 terminals
RoHS Compliant
S ta n d a r d pa rt n u m b e r S f o r 1 0 S e r i e S
Ohmic
value
0.005
0.010
0.015
0.020
0.025
0.030
0.040
0.050
0.060
0.070
0.075
0.080
0.090
0.100
0.150
0.200
0.250
2 watt
12FR005
12FR010
12FR015
12FR020
12FR025
12FR030
12FR040
12FR050
12FR060
12FR070
12FR080
12FR090
12FR100
2 Terminal
3 watt
13FR005
13FR010
13FR015
13FR020
13FR025
13FR030
13FR040
13FR050
13FR060
13FR070
13FR080
13FR090
13FR100
13FR150
13FR200
5 watt
15FR005
15FR010
15FR015
15FR020
15FR025
15FR030
15FR040
15FR050
15FR060
15FR070
15FR080
15FR090
15FR100
15FR150
15FR200
15FR250
3 watt
13FPR005E
13FPR010E
13FPR015E
13FPR020E
13FPR025E
13FPR030E
13FPR040E
13FPR050E
13FPR060E
13FPR070E
13FPR075E
13FPR080E
13FPR090E
13FPR100E
4 Terminal
4.5 watt
14FPR005E
14FPR010E
14FPR015E
14FPR020E
14FPR025E
14FPR030E
14FPR040E
14FPR050E
14FPR060E
14FPR070E
14FPR075E
14FPR080E
14FPR090E
14FPR100E
7 watt
17FPR005E
17FPR010E
17FPR015E
17FPR020E
17FPR025E
17FPR030E
17FPR040E
17FPR050E
17FPR060E
17FPR070E
17FPR075E
17FPR080E
17FPR090E
17FPR100E
½½½½½½½½½
10 Series
Tolerance Ohm Value
F = 1%
Example:
D= 0.5%
R050= 0.05½
Check product availability at
www.ohmite.com
Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
17
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