10 Series
Axial Wire Element Current Sense
Four Terminal Axial
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 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 require-
ment to connect to the terminals at precise test
points is eliminated, allowing for tighter tolerancing
on the end application.
CharaCteriStiCS
Terminals
Tinned Copper Leads
Encapsulation
Silicone Molding Compound
Derating
Linearly from 100% at +25˚C to 0% at
+200˚C
Resistance Range
0.005Ω to 0.100Ω standard
Standard Tolerance
±1%; others available
Operating Temp. Range
-55˚C to +200˚C
Temperature Coefficient
(0˚C to 85˚C) ≥0.015Ω: ±50 PPM/˚C;
of Resistance
<0.015Ω: ±100 PPM/˚C
Environmental
Exceeds the requirements of MIL-
Performance
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
1500 VAC for 4.5 and 7 watt; 1000
voltage
VAC for 3 watt
Insulation resistance
Not less than 1000 MΩ
Thermal EMF
Less than ±2µV/˚C
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
Series
14
13
Wattage
4.5
7
3
Length
1.060/26.9
0.625/15.9
Diam.
0.335/8.51
0.200/5.08
F e at u r e S
• Ideal for current sensing applications
• 1% Tolerance standard, others available
• Low Inductance (non-inductive below 0.25Ω)
• Tinned Copper Leads
• RoHS Compliant
S e r i e S S p e C i F i C at i o n S
Series
13
14
17
Wattage
Ohms
3
0.005-0.1
4.5
0.005-0.1
7
0.005-0.1
DimenSionS
A (min.)
L +.015 /
+0.4
D +.015 /
+0.4
B
±.010
/
±
0.03
0.032
±.002
0.81
±
.05
(20 AWG)
A
1.50/38.1
1.25/31.8
B
0.200/5.08
0.125/3.18
17
1.500/38.1
0.375/9.53
1.50/38.1
0.200/5.08
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
�½�½�½�½�½�½�½�½�½
10 Series
Tolerance Ohm Value
F = 1%
Example:
D= 0.5%
R050= 0.05�½
Standard part numbers
3 watt
4.5 watt
7 watt
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
45
OHMITE [ OHMITE MFG. CO. ]
