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

-0.4

-0.2

0.2

∆R/R

dimensions ( mm )

power derating curve

0

20

40

60

80

100

120

140

terminal temperature T

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