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Diode Modules
Preliminary Data Sheet
PSKD 255
IFRMS IFAVM VRRM
2
= 2x 450 A = 2x 270 A = 800-1800 V
3 2
VRSM V 900 1300 1500 1700 1900
VRRM V 800 1200 1400 1600 1800
Type
3
1
PSKD 255/08 PSKD 255/12 PSKD 255/14 PSKD 255/16 PSKD 255/18
1
Symbol IFRMS IFAVM IFSM
Test Conditions TVJ = TVJM TC = 100C; 180 sine TVJ = 45C; VR = 0 TVJ = TVJM VR = 0 t = 10 ms (50 Hz) t = 8.3 ms (60 Hz) t = 10 ms (50 Hz) t = 8.3 ms (60 Hz) t = 10 ms (50 Hz) t = 8.3 ms (60 Hz) t = 10 ms (50 Hz) t = 8.3 ms (60 Hz)
Maximum Ratings 450 270 9500 10200 8400 9000 451 000 437 000 353 000 340 000 -40...+150 150 -40...+125 A A A A A A A 2s A 2s A 2s A 2s C C C V~ V~
Features Direct copper bonded Al2O3 -ceramic base plate Planar passivated chips Isolation voltage 3600 V~ UL registered, E 148688

i2dt
TVJ = 45C VR = 0 TVJ = TVJM VR = 0
Applications Supplies for DC power equipment DC supply for PWM inverter Field supply for DC motors Battery DC power supplies

TVJ TVJM Tstg VISOL Md Weight Symbol IRRM VF VT0 rT RthJC RthJK QS IRM dS dA a 50/60 Hz, RMS IISOL 1 mA t = 1 min t=1s
3000 3600
Advantages Space and weight savings Simple mounting Improved temperature and power cycling Reduced protection circuits

Mounting torque (M6) Terminal connection torque (M8) Typical including screws Test Conditions TVJ = TVJM; VR = VRRM IF = 600 A; TVJ = 25C For power-loss calculations only TVJ = TVJM per per per per diode; DC current module diode; DC current module other values see PSKT 255
4.5-7/40-62 Nm/lb.in. 11-13/97-115 Nm/lb.in. 750 g Characteristic Values 30 mA 1.4 0.8 0.6 0.140 0.07 0.18 0.09 700 260 12.7 9.6 50 V V m K/W K/W K/W K/W C A mm mm m/s 2
Dimensions in mm (1 mm = 0.0394")
M8x20
TVJ = 125C; IF = 400 A; -di/dt = 50 A/s Creeping distance on surface Creepage distance in air Maximum allowable acceleration
Data according to IEC 60747 and refer to a single thyristor/diode unless otherwise stated.
2003 POWERSEM reserves the right to change limits, test conditions and dimensions POWERSEM GmbH, Walpersdorfer Str. 53 D - 91126 Schwabach Phone: 09122 - 9764 - 0 FAX: 09122 - 9764 - 20
10000
106 It
2
IFSM
A
VR = 0V
A2s
500 A 450
8000
50 Hz 80 % VRRM TVJ = 45C TVJ = 150C
IFAVM
400 350 300
DC 180 sin 120 60 30
6000
TVJ = 45C
4000
250
TVJ = 150C
200 150 100 50
2000
0 0.001
0.01
0.1
s t
1
105
1 t
ms
10
0
0
25
50
75
100
TC
125 C 150
Fig. 1 Surge overload current IFSM: Crest value, t: duration
500 Ptot W 400
Fig. 2 I2t versus time (1-10 ms)
Fig. 3 Maximum forward current at case temperature Fig. 4 Power dissipation versus forward current and ambient temperature (per diode)
RthKA K/W
300 DC 180 sin 120 60 30
0.1 0.2 0.3 0.4 0.6 0.8 1.2
200
100
0
0
100
200
300
400 A IFAVM
0
25
50
75
100
125 C TA
150
1500 Ptot W 1250 R 1000 L
RthKA K/W
750 Circuit Circuit B2U B2U 2 xx MDD255 2 PSKD 255
0.06 0.08 0.1 0.15 0.2 0.3 0.5
Fig. 5 Single phase rectifier bridge: Power dissipation versus direct output current and ambient temperature R = resistive load L = inductive load
500
250
0
0
100
200
300
400
500 A IdAVM
0
25
50
75
100
C 125 TA
150
2003 POWERSEM reserves the right to change limits, test conditions and dimensions POWERSEM GmbH, Walpersdorfer Str. 53 D - 91126 Schwabach Phone: 09122 - 9764 - 0 FAX: 09122 - 9764 - 20
2500 W Ptot 2000 RthKA K/W
1500
0.03 0.06 0.1 0.15 0.2 0.3 0.4
Fig. 6 Three phase rectifier bridge: Power dissipation versus direct output current and ambient temperature
1000
Circuit Circuit B6U B6U 3 PSKD 255 3 xx MDD255
500
0
0
200
400
600
800 A IdAVM
0
25
50
75
100
125 C 150 TA
0.25 K/W 0.20 ZthJC 0.15 30 60 120 180 DC
Fig. 7 Transient thermal impedance junction to case (per diode) RthJC for various conduction angles d: d DC 180 120 60 30 RthJC (K/W) 0.139 0.148 0.156 0.176 0.214
0.10
0.05
Constants for ZthJC calculation: i Rthi (K/W) 0.0066 0.0358 0.0831 0.0129 ti (s) 0.00054 0.098 0.54 12 1 2 3 4
0.00 10-3
10-2
10-1
100
101 t
s
102
0.30 K/W 0.25 ZthJK 0.20
Fig. 8 Transient thermal impedance junction to heatsink (per diode) RthJK for various conduction angles d: d DC 180 120 60 30 RthJK (K/W) 0.179 0.188 0.196 0.216 0.254
0.15 30 60 120 180 DC
0.10
0.05
Constants for ZthJK calculation: i Rthi (K/W) 0.0066 0.0358 0.0831 0.0129 0.04 ti (s) 0.00054 0.098 0.54 12 12 1 2 3 4 5
0.00 10-3
10-2
10-1
100
101 t
s
102
POWERSEM GmbH, Walpersdorfer Str. 53 2003 POWERSEM reserves the right to change limits, test conditions and dimensions D - 91126 Schwabach Phone: 09122 - 9764 - 0 FAX: 09122 - 9764 - 20

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