RHOPOINT COMPONENTS LTD

Holland Road, Hurst Green, Oxted, Surrey, RH8 9AX, ENGLAND

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Spec Sheet R501-1/2 01/99

Temperature dependence of the electrical resistance

of ISA-PLAN resistors

power derating curve

Remarks:

- 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.

pad size (bottom view)

Precision Resistor Type PMA

-40

-20

20

40

60

80

100

120

-0.4

-0.2

0.2

∆R/R

Technical data

resistance range

2mOhm - 500mOhm

tolerances

1%, 5%

temperature coefficient tcr ( R > 20mOhm )

< ±30ppm/K ( 20°C to 60°C )

applicable temperature range

-55°C to +125°C

load capacity

3W

thermal resistance to ambiente

Rth < 10K/W

dielectric withstanding voltage

100VAC

inductance

< 10nH

stability

deviation <0.5% after 2,000h

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