Precision Resistor Type SMV
Spec Sheet R431-1/2 Dec 97
Remarks:
- 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.
Temperature dependence of the electrical resistance
of ISA-PLAN resistors
-40
-20
20
40
60
80
100
120
T [
o
C]
-0.4
-0.2
0.2
R/R
20
[%]
dimensions ( mm )
power derating curve
0
20
40
60
80
100
120
140
terminal temperature T
K
/ [
o
C]
0.25
0.5
0.75
1
P / P
Nom
stability: 1%
stability: 0.5%
reduced
technical data
resistance range
1 mOhm - 1 Ohm
tolerances
0.5 % / 1 % / 5 %
temperature coefficient ( R > 10 mOhm )
< 30 ppm/K (20 C to 60 C)
applicable temperature range
-55 C to +140 C
load capacity
3 W
internal thermal resistance (foil / terminals)
Rthi < 15 K/W
dielectric withstanding voltage
1000 V AC
inductance (R = 10 mOhm)
< 10 nH
stability (nominal load at Tk = 80 C)
deviation < 0.5 % after 2000 h
Spec Sheet R431-2/2 Dec 97
Limits:
dR/R
0
after 1*10
6
pulse cycles : < 1%
average pulsepower < 1/10 P
0
RHOPOINT COMPONENTS LTD
Tel: +44/01883 717988, Fax: +44/01883 712938, Email: sales@rhopointcomponents.com Website: www.rhopointcomponents.com
ordering example: SMV - R003 - 5
type
SMV
resistance value
3 mOhm
tolerance
5 %
( Technical modifications reserved )
Proposal for PCB-layout
24 mm carrier tape according to IEC 286-3 (EIA-481)
parts/reel:
1500 pcs
Tape & Reel information
pulse width
power [W]
energy [J]
power [W]
100
10
1
0.1
0.01
0.001
1k
10k
0.01
0.1
1
10
100
1k
1
s
10
s
100
s
1 ms
10 ms
100 ms
1 s
10 s
100 s
100k
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