MDD 255 High Power Diode Modules VRSM VDSM VRRM VDRM V V 1300 1500 1700 1900 2100 2300 1200 1400 1600 1800 2000 2200 IFRMS = 2x 450 A IFAVM = 2x 270 A VRRM = 1200-2200 V Type 3 1 3 2 2 MDD 255-12N1 MDD 255-14N1 MDD 255-16N1 MDD 255-18N1 MDD 255-20N1 MDD 255-22N1 Symbol Test Conditions IFRMS IFAVM TVJ = TVJM TC = 100°C; 180° sine IFSM TVJ = 45°C; VR = 0 1 Maximum Ratings 450 270 A A t = 10 ms (50 Hz) t = 8.3 ms (60 Hz) 9500 10200 A A TVJ = TVJM VR = 0 t = 10 ms (50 Hz) t = 8.3 ms (60 Hz) 8400 9000 A A TVJ = 45°C VR = 0 t = 10 ms (50 Hz) t = 8.3 ms (60 Hz) 451 000 437 000 A2s A2s TVJ = TVJM VR = 0 t = 10 ms (50 Hz) t = 8.3 ms (60 Hz) 353 000 340 000 A2s A2s -40...+150 150 -40...+125 °C °C °C 3000 3600 V~ V~ Features International standard package Direct copper bonded Al2O3-ceramic with copper base plate Planar passivated chips Isolation voltage 3600 V~ UL registered E 72873 ● ● ● ● ● òi2dt Applications Supplies for DC power equipment DC supply for PWM inverter Field supply for DC motors Battery DC power supplies ● ● ● VISOL 50/60 Hz, RMS IISOL £ 1 mA Md Weight Mounting torque (M6) Terminal connection torque (M8) Typical including screws 4.5-7/40-62 Nm/lb.in. 11-13/97-115 Nm/lb.in. 750 g Symbol IRRM Test Conditions TVJ = TVJM; VR = VRRM Characteristic Values 30 mA VF IF = 600 A; TVJ = 25°C 1.4 V VT0 rT For power-loss calculations only TVJ = TVJM 0.8 0.6 V mW RthJC per diode; DC current per module per diode; DC current per module 0.140 0.07 0.18 0.09 K/W K/W K/W K/W RthJK t = 1 min t=1s other values see MCC 255 QS IRM TVJ = 125°C; IF = 400 A; -di/dt = 50 A/ms 700 260 mC A dS dA a Creeping distance on surface Creepage distance in air Maximum allowable acceleration 12.7 9.6 50 mm mm m/s2 Data according to IEC 60747 and refer to a single diode unless otherwise stated. IXYS reserves the right to change limits, test conditions and dimensions © 2000 IXYS All rights reserved Advantages Simple mounting Improved temperature and power cycling Reduced protection circuits ● ● ● Dimensions in mm (1 mm = 0.0394") M8x20 749 TVJ TVJM Tstg ● 1-3 MDD 255 106 10000 IFSM It A 50 Hz 80 % VRRM TVJ = 45°C TVJ = 150°C 8000 500 A 450 VR = 0V 2 IFAVM A2s DC 180° sin 120° 60° 30° 400 350 300 6000 TVJ = 45°C 250 200 4000 TVJ = 150°C 150 100 2000 50 5 0 0.001 10 0.01 s 0.1 1 0 1 ms t t 0.1 0.2 0.3 0.4 0.6 0.8 1.2 400 300 50 75 100 125 °C 150 Fig. 4 Power dissipation versus forward current and ambient temperature (per diode) RthKA K/W W 25 Fig. 3 Maximum forward current at case temperature 500 Ptot 0 TC Fig. 2 I2t versus time (1-10 ms) Fig. 1 Surge overload current IFSM: Crest value, t: duration 10 DC 180° sin 120° 60° 30° 200 100 0 0 100 200 300 400 A 0 25 50 75 100 IFAVM 1500 Ptot W 1250 125 °C TA 150 Fig. 5 Single phase rectifier bridge: Power dissipation versus direct output current and ambient temperature R = resistive load L = inductive load RthKA K/W R 0.06 0.08 0.1 0.15 0.2 0.3 0.5 L 1000 750 Circuit B2U 2 x MDD255 500 250 0 0 100 200 300 400 500 A 0 25 50 75 100 °C 125 150 TA 808 IdAVM © 2000 IXYS All rights reserved 2-3 MDD 255 2500 Fig. 6 Three phase rectifier bridge: Power dissipation versus direct output current and ambient temperature RthKA K/W W 0.03 0.06 0.1 0.15 0.2 0.3 0.4 Ptot 2000 1500 1000 Circuit B6U 3 x MDD255 500 0 0 200 400 600 800 A IdAVM 0 25 50 75 100 125 °C 150 TA 0.25 Fig. 7 Transient thermal impedance junction to case (per diode) K/W 0.20 RthJC for various conduction angles d: d ZthJC 0.15 DC 180° 120° 60° 30° 30° 60° 120° 180° DC 0.10 0.139 0.148 0.156 0.176 0.214 Constants for ZthJC calculation: 0.05 i 0.00 10-3 RthJC (K/W) 10-2 10-1 100 101 s 102 t 1 2 3 4 Rthi (K/W) ti (s) 0.0066 0.0358 0.0831 0.0129 0.00054 0.098 0.54 12 Fig. 8 Transient thermal impedance junction to heatsink (per diode) 0.30 K/W 0.25 RthJK for various conduction angles d: ZthJK d 0.20 DC 180° 120° 60° 30° 0.15 30° 60° 120° 180° DC 0.10 0.05 Constants for ZthJK calculation: i 0.00 10-3 10-2 10-1 100 RthJK (K/W) 0.179 0.188 0.196 0.216 0.254 s 101 Rthi (K/W) ti (s) 0.0066 0.0358 0.0831 0.0129 0.04 0.00054 0.098 0.54 12 12 808 t 102 1 2 3 4 5 © 2000 IXYS All rights reserved 3-3