Precision Resistor Type SMV
Spec Sheet R431-1/2 Dec 97
technical data
resistance range
tolerances
temperature coefficient ( R > 10 mOhm )
applicable temperature range
load capacity
internal thermal resistance (foil / terminals)
dielectric withstanding voltage
inductance (R = 10 mOhm)
stability (nominal load at Tk = 80 °C)
Remarks:
-
-
-
-
1 mOhm - 1 Ohm
0.5 % / 1 % / 5 %
< 30 ppm/K (20 °C to 60 °C)
-55 °C to +140 °C
3W
Rthi < 15 K/W
1000 V AC
< 10 nH
deviation < 0.5 % after 2000 h
Standard resistance values according to E12 with the additional values of 2 and 5
Minimum quantity of other values on request
Tolerance 1% for values from 3 mOhm
Tolerance 0.5% for values from 10 mOhm
Resistor type
SMV
is the low ohmic version of type SMR
in four-terminal execution. The temperature coefficient
therefore is very low over the complete range; the resistance
value is likewise independent on the quality of the solder
connection.
A high load capacity is achieved with the bulk copper
connections in conjunction with a good heat - conducting
substrate for the resistor element inside, as well as a
temperature resistant epoxy resin housing.
The resistor is also well suitable for switched applications
based on its low inductance.
The type SMV is delivered on a 24 mm belt in accordance
with EIA-481 for automated assembly.
∆R/R
20
[%]
0.2
-40
-20
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]
dimensions ( mm )
power derating curve
Spec Sheet R431-2/2 Dec 97
Proposal for PCB-layout
Tape & Reel information
ordering example: SMV - R003 - 5
type
SMV
resistance value
3 mOhm
tolerance
5%
24 mm carrier tape according to IEC 286-3 (EIA-481)
parts/reel:
1500 pcs
power [W]
10k
1k
100
1k
10
100
1
100k
10
0.1
1
0.01
0.1
0.001
0.01
1
µs
10
µs
100
µs
1 ms
10 ms
100 ms
1s
10 s
100 s
pulse width
Limits:
dR/R
0
after 1*10
6
pulse cycles : < 1%
average pulsepower < 1/10 P
0
( Technical modifications reserved )
RHOPOINT COMPONENTS LTD
Tel: +44/01883 717988, Fax: +44/01883 712938, Email: sales@rhopointcomponents.com Website: www.rhopointcomponents.com
power [W]
energy [J]
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