Precision Resistor Type PBV

Spec Sheet R361-1/2 July 97

Technical Data

Resistance range

0.5 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 +125 °C

Load capacity

3 W / 10 W with heatsink provided

Thermal resistance to aluminum base plate

Rth < 3 K/W

Thermal resistance to ambient

Rth < 15 K/W

Dielectric withstanding voltage

500 V AC

Inductance ( R = 50 mOhm )

< 5 nH

Stability ( nominal load at 70 °C )

deviation < 0.5 % after 2,000 h

Remarks:

- Standard resistance values according to E12 with the additionel values of 2 and 5

- Minimum quantity of other values on request

- Tolerance 0.5% for values from 4,7 mOhm

The four-terminal resistor type PBV derived from type PBH

is especially designed for the low impedance range, in

order to obtain lowest temperature coefficient values, and

in order to guarantee the independence of the resistance

value from the soldering quality. The use of the precision

resistance material MANGANIN combined with a highly

temperature resistant and humidity insusceptible Duroplast

cover as well as optimization of layout and lines result in a

high longterm stability, low temperature coefficient and low

inductance.

The shape is compatible with the latest power transistors.

The resistor is mounted through a center bore or

spring clamp to a heatsink, whereby the large area of the

base plate will provide excellent heat transfer. The low

thermal resistance between resistor foil and aluminum

base plate warrants for a low temperature rise at nominal

load in this configuration and permits transient overloading

up to one magnitude.

The resistor is ideally suited for applications in power

electronic and control technique, as most applications at

inductive loading will require operation with switched power

regulating units.

Short connection distances and small dimensions at high

load capacity and low inductance are a prerequi-

site to obtain high switching frequencies.

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)

0

20

40

60

80

100

120

T

0.25

0.5

0.75

1

P / P

Nenn

power derating curve