Rectifier Diode Types W8405Z#100 to W8405Z#140

Data Sheet. Types W8405Z#100 to W8405Z#140 Issue 2

Page 3 of 10

July, 2014

Notes on Ratings and Characteristics

1.0 Voltage Grade Table

Voltage Grade

V

V

DC V

10

1000

1100

700

14

1400

1500

930

2.0 Extension of Voltage Grades

This report is applicable to other voltage grades when supply has been agreed by Sales/Production.

3.0 De-rating Factor

4.0 Snubber Components

When selecting snubber components, care must be taken not to use excessively large values of snubber

capacitor or excessively small values of snubber resistor. Such excessive component values may lead to

device damage due to the large resultant values of snubber discharge current. If required, please consult

the factory for assistance.

5.0 Computer Modelling Parameters

5.1 Device Dissipation Calculations

T

AV

T

T

T

AV

r

ff

W

r

ff

V

V

I



















2

2

2

0

0

2

4

and:

K

j

th

AV

T

T

T

R

T

W











max



Supplementary Thermal Impedance

Conduction Angle

6 phase (60°)

3 phase (120°)

½ wave (180°)

d.c.

Square wave Double Side Cooled

0.0144

0.0132

0.0126

0.0116

Square wave Cathode Side Cooled

0.0262

0.0251

0.0244

0.0235

Sine wave Double Side Cooled

0.0133

0.0124

0.0115

Sine wave Cathode Side Cooled

0.0253

0.0244

0.0234

Form Factors

Conduction Angle

6 phase (60°)

3 phase (120°)

½ wave (180°)

d.c.

Square wave

2.449

1.732

1.414

1

Sine wave

2.778

1.879

1.57