WESTCODE An IXYS Company Date:- 16 Jun, 26 Data Sheet Issue:- 1 Provisional Data Rectifier Diode Type W428##25 to W428##32 Development Type No.: WX171##25-32 Absolute Maximum Ratings VOLTAGE RATINGS MAXIMUM LIMITS UNITS V RRM Repetitive peak reverse voltage, (note 1) 25-32 V V RSM Non-repetitive peak reverse voltage, (note 1) 26-33 V OTHER RATINGS MAXIMUM LIMITS UNITS I F(AV)M Maximum average forward current, T case=55 C, (note 2) 428 A I F(AV)M Maximum average forward current. T case =7 C, (note 2) 38 A I F(AV)M Maximum average forward current. T case = C, (note 2) 271 A I F(RMS) Nominal RMS forward current, T case = C, (note 2) 425 A I F(RMS) Nominal RMS forward current, T case =25 C, (note 2) 89 A I F(d.c.) D.C. forward current, T case =25 C 675 A I FSM Peak non-repetitive surge t p=1ms, V rm=6%v RRM, (note 3) 55 A I FSM2 Peak non-repetitive surge t p=1ms, V rm 1V, (note 3) 65 A I 2 t I 2 t capacity for fusing t p=1ms, V rm=6%v RRM, (note 3) 151 1 3 A 2 s I 2 t I 2 t capacity for fusing t p=1ms, V rm 1V, (note 3) 183 1 3 A 2 s T j op Operating temperature range -4 to +15 C T stg Storage temperature range -4 to +15 C Notes:- 1) De-rating factor of.13% per C is applicable for T j below 25 C. 2) Single phase; 5Hz, 18 half-sinewave. 3) Half-sinewave, 15 C T j initial. Provisional Data Sheet. Type W428##25 to W428##32 Page 1 of 8 June, 26
Characteristics PARAMETER MIN. TYP. MAX. TEST CONDITIONS (Note 1) UNITS V FM Maximum peak forward voltage - - 1.6 I TM=9A V V FM Maximum peak forward voltage - - 1.8 I TM=118A V V T Threshold voltage - -.926 V r T Slope resistance - -.739 mω I RRM Peak reverse current - - 15 Rated V RRM ma Q rr Recovered charge - - µc Q ra Recovered charge, 5% chord - 7 9 I TM=A, t P=5µs, di/dt=1a/µs, V r=5v µc I rr Reverse recovery current - 75 - A t rr Reverse recovery time, 5% chord - 19 - µs R thjc Thermal resistance, junction to case - -.13 18 sine K/W R thck Thermal resistance, case to heatsink - -.4 K/W F Mounting torque 24-3 Nm W t - 175 - Outline E Weight g - 25 - Outline F Notes:- 1) Unless otherwise indicated T j=15 C. Provisional Data Sheet. Type W428##25 to W428##32 Page 2 of 8 June, 26
Notes on Ratings and Characteristics 1. Voltage Grade Table V RRM Voltage Grade V RSM V R V V DC V 25 25 26 15 26 26 27 155 28 28 29 165 3 3 3 175 32 32 33 185 2. Extension of Voltage Grades This report is applicable to other voltage grades when supply has been agreed by Sales/Production. 3. De-rating Factor A blocking voltage de-rating factor of.13%/ C is applicable to this device for T j below 25 C. 4. 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. Computer Modelling Parameters I AV 5.1 Device Dissipation Calculations 2 VT + VT + = 2 4 ff 2 ff r T 2 r T W AV and: Where V T =.926V, r T =.739mΩ, R th = Supplementary thermal impedance, see table below and ff = Form factor, see table below. W AV T = R T = T th j max T K Supplementary Thermal Impedance Conduction Angle 6 phase (6 ) 3 phase (12 ) ½ wave (18 ) d.c. Square wave.174.153.143.13 Sine wave.172.153.149 Form Factors Conduction Angle 6 phase (6 ) 3 phase (12 ) ½ wave (18 ) d.c. Square wave 2.449 1.732 1.414 1 Sine wave 2.778 1.879 1.57 Provisional Data Sheet. Type W428##25 to W428##32 Page 3 of 8 June, 26
5.2 Calculating V F using ABCD Coefficients The on-state characteristic I F vs. V F, on page 6 is represented in two ways; (i) the well established V T and r T tangent used for rating purposes and (ii) a set of constants A, B, C, D, forming the coefficients of the representative equation for V F in terms of I F given below: V F = A + B ln ( I F ) + C I F + D I F The constants, derived by curve fitting software, are given below for both hot and cold characteristics. The resulting values for V F agree with the true device characteristic over a current range, which is limited to that plotted. 25 C Coefficients 15 C Coefficients A.7795642 A.634984 B.459695 B.4112559 C 4.6493 1-4 C 5.72979 1-4 D 2.1935 1-3 D 5.7922 1-3 6. Reverse recovery ratings (i) Q ra is based on 5% I rm chord as shown in Fig. 1 Fig. 1 (ii) Q rr is based on a 15µs integration time i.e. (iii) K Factor = t t 1 2 Q rr = 15µ s i rr. dt Provisional Data Sheet. Type W428##25 to W428##32 Page 4 of 8 June, 26
Curves Figure 1 - Forward characteristics of Limit device Instantaneous forward current - I FM (A) 25 C 15 C 1..5 1. 1.5 2. 2.5 Maximum instantaneous forward voltage - V FM (V) Figure 2 - Maximum surge and I 2 t ratings Total peak half sine surge current - I FSM (A) T j (initial) = 15 C I 2 t: V RRM 1V I 2 t: V R =6% V RRM I FSM : V RRM 1V I FSM : V R =6% V RRM 1 3 5 1 1 5 1 5 Duration of surge (ms) Duration of surge (cycles @ 5Hz) 1.E+7 1.E+6 1.E+5 Maximum I 2 t (A 2 s) Provisional Data Sheet. Type W428##25 to W428##32 Page 5 of 8 June, 26
Figure 3 Total recovered charge, Q rr Figure 4 Recovered charge, Q ra (5% chord) T j = 15 C T j = 15 C Total recovered charge - Q rr (µc) A 5A 2A A Recovered charge - Q ra (µc) A 5A 2A A 1 1 Commutation rate - di/dt (A/µs) 1 1 Commutation rate - di/dt (A/µs) Figure 5 Peak reverse recovery current, I rm. T j = 15 C A 5A 2A A Figure 6 Maximum recovery time, t rr (5% chord) T j = 15 C Reverse recovery current - I rm (A). Recovery time - t rr (µs) 1 A 5A 2A A 1. 1 1 Commutation rate - di/dt (A/µs) 1 1 1 Commutation rate - di/dt (A/µs) Provisional Data Sheet. Type W428##25 to W428##32 Page 6 of 8 June, 26
Figure 7 Forward current vs. Power dissipation Figure 8 Forward current vs. Heatsink temperature d.c. 16 9 8 3ø ½ wave 14 Maximum Forward Dissipation (W) 7 6 5 4 3 2 6ø Maximum permissible heatsink temperature ( C) 12 8 6 4 2 6ø 3ø ½ wave d.c. 2 4 6 8 Mean Forward Current (A) (Whole cycle averaged) 2 4 6 8 Mean forward current (A) (Whole cycle averaged) Figure 9 Transient thermal resistance 1 R thjc.13k/w Thermal impedance (K/W).1.1.1.1.1.1 1 1 Time (s) Provisional Data Sheet. Type W428##25 to W428##32 Page 7 of 8 June, 26
Outline Drawing & Ordering Information S R Outline option E Outline option F ORDERING INFORMATION (Please quote 1 digit code as below) W428 # # Fixed Type Code Polarity code R = Base Anode S = Base Cathode Outline code E=¾ HV ceramic stud + lug F=¾ HV ceramic stud Voltage code V DRM/ 25-32 Typical order code: W428SE32 32V, V RRM, ¾ stud, cathode base, high voltage ceramic housing with lug Fixed code IXYS Semiconductor GmbH Edisonstraße 15 D-68623 Lampertheim Tel: +49 626 53- Fax: +49 626 53-627 WESTCODE E-mail: marcom@ixys.de An IXYS Company Westcode Semiconductors Ltd Langley Park Way, Langley Park, Chippenham, Wiltshire, SN15 1GE. Tel: +44 ()1249 444524 Fax: +44 ()1249 659448 E-mail: WSL.sales@westcode,com IXYS Corporation 354 Bassett Street Santa Clara CA 9554 USA Tel: +1 (48) 982 7 Fax: +1 (48) 496 67 E-mail: sales@ixys.net www.westcode.com www.ixys.com Westcode Semiconductors Inc 327 Cherry Avenue Long Beach CA 987 USA Tel: +1 (562) 595 6971 Fax: +1 (562) 595 8182 E-mail: WSI.sales@westcode.com The information contained herein is confidential and is protected by Copyright. The information may not be used or disclosed except with the written permission of and in the manner permitted by the proprietors Westcode Semiconductors Ltd. Westcode Semiconductors Ltd. In the interest of product improvement, Westcode reserves the right to change specifications at any time without prior notice. Devices with a suffix code (2-letter, 3-letter or letter/digit/letter combination) added to their generic code are not necessarily subject to the conditions and limits contained in this report. Provisional Data Sheet. Type W428##25 to W428##32 Page 8 of 8 June, 26