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)LJXUH

measured voltage v

reversecurrent i

reverse current i at vr r

capacitive hysteresis

vr

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Conducting area

Threshold voltage

Forward direction

Reversedirection

Blocking areaBreak through

Equivalent sloperesistance

V

I

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29/140

%DVLFV

Anode (metallised)

p+-Si

n--Si

n+-Si

Glass passivation

pn-junction Cathode (metallised)

wp

Anode (metallised)

n--Si

n+-Si

Guard ring

Schottky-Contact

Cathode (metallised)

p-Si

Oxid

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30/140

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31/140

%DVLFV

tfr

static value of forwardvoltage

IF

0.1 IF

v

VFF0.1 VF

1.1 VF

t

maximum turn-on voltageVFRM

)LJXUH 'LRGHWXUQRQEHKDYLRXU

7XUQRIIEHKDYLRXU

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32/140

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6FKRWWN\GLRGHV

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6FKRWWN\GLRGHVKDYHQRUHYHUVHFXUUHQW,550

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Anode

CathodeGate

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33/140

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5HYHUVHFXUUHQW

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34/140

%DVLFV

Forward

blocking

Forward breakover

Forward direction

Conducting

Reverseblocking

Break throughvoltage Holding

current

I

V

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p-Si

n--Si

n+ -Si

Glass passivation

Cathode (metallised)

p+-Si

Gate (metallised)

High blocking pn-junction

Anode (metallised)

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Section1 Power Semiconductors Basic Operating Principles Section2 Basics

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