Precision Resistor Type PMA
Spec Sheet R501-1/2 01/99
Technical data
resistance range
tolerances
temperature coefficient tcr ( R > 20mOhm )
applicable temperature range
load capacity
thermal resistance to ambiente
dielectric withstanding voltage
inductance
stability
Remarks:
2mOhm - 500mOhm
1%, 5%
< ±30ppm/K ( 20°C to 60°C )
-55°C to +125°C
3W
Rth < 10K/W
100VAC
< 10nH
deviation <0.5% after 2,000h
- Standard resistance values according to E12 with the additional values of 2 and 5
- Minimum quantity of other values on request
This resistor has been developed especially for current
sense applications in SMD-power modules.
The
PMA
has been designed for flip-chip mounting on the
pc-board. All standard soldering processes like reflow-,
infrared-, vapor phase-, dip- and wave-soldering can be
used.
The heat which is generated by the measuring current is
conducted very efficiently to the pc-board via the heat
conductive substrate and the solder joints.
-40
-20
∆R/R
20
[%]
0.2
20
40
60
80
100
120
T [
o
C]
-0.2
-0.4
Temperature dependence of the electrical resistance
of ISA-PLAN resistors
P / P
Nom
1
0.75
stability: 0.5%
reduced
stability: 1%
0.5
0.25
0
20
40
60
80
100 120 140
terminal temperature T
K
/ [
o
C]
pad size (bottom view)
power derating curve
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