RES-LVK Datasheet, PDF (1/3 Pages) Ohmite Mfg. Co. – Industry standard sizes

LVK Series
Four Terminal High Precision Current Sense
Current sense resistors enable the measurement of current flow
in a circuit by monitoring a voltage drop across a precisely cali-
brated resistance. The LVK chip features four terminals, also
known as a “Kelvin” configuration. This configuration enables
current to be applied through two opposite terminals and a
sensing voltage to be measured across the other two terminals,
eliminating the resistance and temperature coefficient of the
terminals for a more accurate current measurement.
Isolating the voltage and current terminals (see schematic)
facilitates a very accurate current measurement. Ohmite’s pro-
prietary technology offers an excellent Temperature Coefficient
of Resistance (TCR) even for very low resistance values. The
resistive element consists of a durable, anti-corrosive metal
alloy that combines reliable performance with the ability to
withstand harsh environments.
F e at u r e s
• Designed for automatic
insertion
• Industry standard sizes
• High-precision Kelvin
connect capability in a
small package
Schematic
V
V
I
I
V = sensing terminal
(voltage)
I = current terminal
Series Specifications

Power

Pkg.
Rating
Series
Size (W @70°C)
LVK12 1206
0.5W
LVK20 2010
0.75W
LVK24 2412
1.0W

LVK25 1224
2.0W

Resistance Max. Over Current
Range
TCR
Available
Max. Max.
(Ω)
(ppm/°C) Tolerance
Values
Power Current
0.01-0.100 50ppm 0.5%, 1%
E12
20W 20A
0.01-0.05
50ppm 0.5%, 1%
E12
29W 23A
0.01-0.100 50ppm 0.5%, 1%
E12
38W 27A
0.001
0.002-0.004
0.005-0.01
300ppm
200ppm
1% 1, 2, 3, 5, 9,10mΩ 150W 200A
100ppm
characteristics
Res. Range 0.001Ω - 0.010Ω
Operating Temp. Range -40°C to +125°C
Rated Ambient Temperature +70°C
Resistance Tolerance 0.5% and 1% standard
Temperature Coefficient LVK12, LVK20, LVK24: 50ppm standard
LVK25: 100ppm, 200ppm, or 300ppm based on
resistance value
Coating Material epoxy resin
Terminals 100% matte tin
Max. Over Current Time applied: 10ms max.
Interval: 60sec min.
Max. over current = √(Max. power÷ Resistance
value) or max. current, whichever is smaller.
Storage conditions Temperature: 5°C ~ 35°C
Humidity: 25% ~ 70%
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