MR2002 datasheet(2/4 Pages) DIGITRON

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DIGITRON SEMICONDUCTORS

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Kenilworth NJ 07033 USA

phone +1.908.245-7200

MR2000 SERIES

MEDIUM CURRENT SILICON RECTIFIERS

Duty cycle = D = tp/t1

Peak power = Ppk

is peak of an

equivalent square

power pulse

To determine maximum junction temperature of the diode in a given situation the following procedure is recommended:

The temperature of the case should be measured using a thermocouple placed on the case at the temperature reference

point. The thermal mass connected to the case is normally large enough so that it will not significantly respond to heat

surges generated in the diode as a result of pulsed operation once steady state conditions are achieved. Using the

measured value of TC the junction temperature may be determined by: TJ = TC + ΔTJC, where ΔTJC is the increase in

junction temperature above the case temperature.

It may be determined by ΔTJC = Ppk ● RØJC [D + (1-D) ● r(tr +tp) –r(t1)] where r(t) = normalized value of transient

thermal resistance at time t from figure 6, and r(t1+tp) = normalized value of transient thermal resistance at time t1 +tp.

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Rev. 20121127

MR2002 数据表(PDF) 2 Page - Digitron Semiconductors