WESTCODE An IXYS Company

Medium Voltage Thyristor Types K0885N#440 to K0885N#520

Notes on Ratings and Characteristics

1.0 Voltage Grade Table

Voltage Grade

44

48

50

52

VDRM VDSM VRRM

V

4400

4800

5000

5200

VRSM

V

4500

4900

5100

5300

VD VR

DC V

2080

2160

2200

2240

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

A blocking voltage de-rating factor of 0.13%/°C is applicable to this device for Tj below 25°C.

4.0 Repetitive dv/dt

Standard dv/dt is 1000V/µs.

5.0 Frequency Ratings

The curves illustrated in figures 16 & 17 are for guidance only and are superseded by the maximum

ratings shown on page 1. For operation above line frequency, please consult the factory for assistance.

6.0 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.

7.0 Rate of rise of on-state current

The maximum un-primed rate of rise of on-state current must not exceed 600A/µs at any time during turn-

on on a non-repetitive basis. For repetitive performance, the on-state rate of rise of current must not

exceed 300A/µs at any time during turn-on. Note that these values of rate of rise of current apply to the

total device current including that from any local snubber network.

8.0 Square wave frequency ratings

These ratings are given for load component rate of rise of on-state current of 100A/µs.

9.0 Duty cycle lines

The 100% duty cycle is represented on the frequency ratings by a straight line. Other duties can be

included as parallel to the first.

Provisional Rating Report. Types K0885N#440 to K0885N#520 Issue 1

Page 3 of 12

March, 2009