Low Vf Schottky Powermod FST19035 - FST19050 1 2 3 Common Cathode E C 1 2 3 B K Q L R H D 1 2 3 A=Common Anode F G P Dim. Inches Max. Min. N 4 Places A J 1 2 3 D=Doubler M Notes: Baseplate: Nickel plated copper; electrically isolated Pins: Nickel plated copper Microsemi Catalog Number Working Peak Peak Reverse Voltage Repetitive Peak Peak Reverse Voltage FST19035* FST19040* FST19045* FST19050* 35V 40V 45V 50V 35V 40V 45V 50V A B C D E F G H J K L M N P Q R 2.005 0.325 0.505 0.192 1.010 2.410 1.525 0.130 0.400 0.260 0.510 0.350 0.195 0.045 0.455 0.910 1.995 0.300 0.495 0.182 0.990 2.390 1.500 0.120 --0.240 0.490 0.330 0.175 0.035 0.445 0.890 Millimeters Min. Max. Notes 50.67 7.62 12.57 4.62 25.15 60.71 38.10 3.05 --6.10 12.45 8.38 4.45 0.89 11.30 22.61 50.93 8.26 12.83 4.88 Dia. 25.65 61.21 38.70 3.30 10.16 6.60 to Lead CL 12.95 6.90 Dia. 4.95 1.14 11.56 23.11 TO-249 Guard Ring Protection Electrically Isolated Base Schottky Barrier Rectifier Low Forward Voltage Reverse Energy Tested VRRM 35 to 50 Volts ROHS Compliant *Add the Suffix A for Common Anode, D for Doubler Electrical Characteristics Average Forward Current per pkg. Average Forward Current per leg Maximum Surge Current per leg Max. Peak Forward Voltage per leg Max. Peak Forward Voltage per leg Max. Peak Reverse Current per leg Max. Peak Reverse Current per leg Typical Junction Capacitance per leg I F(AV) 200 Amps I F(AV) 100 Amps I FSM 1500 Amps V FM .55 Volts V FM .70 Volts I RM 100 mA I RM 4 mA CJ 4800 pF T C = 136°C, Square wave, R 0JC = 0.35°C/W T C = 136°C, Square wave, R 0JC = 0.7°C/W 8.3ms, half sine,TJ = 175°C I FM = 100A:T J = 175°C* I FM = 100A,T J = 25°C * V RRM, T J = 125°C * V RRM, T J = 25°C V R = 5.0V, T J = 25°C *Pulse test: Pulse width 300µsec, Duty cycle 2% Thermal and Mechanical Characteristics Storage temp range Operating junction temp range Max thermal resistance per leg Max thermal resistance per pkg. Typical thermal resistance (greased) Mounting Torque Weight T STG TJ R OJC R OJC R OJC -55°C to 175°C -55°C to 175°C 0.7°C/W Junction to case 0.35°C/W 0.1°C/W Case to sink 15-20 inch pounds 2.3 ounces (58.5 grams) typical www.microsemi.com January, 2010 - Rev. 3 FST19035 - FST19050 Figure 1 Typical Forward Characteristics - Per Leg Figure 3 Typical Junction Capacitance - Per Leg 100000 8000 60000 6000 40000 Junction Capacitance - pF 10000 4000 2000 1000 800 600 20000 10000 6000 4000 2000 1000 0.1 175 C 200 100 80 60 40 20 10 0 0.2 0.4 0.6 0.8 1.0 1.2 50 100 155 145 135 125 115 0 Maximum Power Dissipation - Watts 175 C 10 125 C 75 C 25 C 10 20 Reverse Voltage - Volts 30 20 40 60 80 100 120 140 160 180 200 Figure 5 Maximum Forward Power Dissipation - Per Leg 100 0 90 120 180 DC 60 105 Average Forward Current - Amperes 1000 Typical Reverse Current - mA 10 165 1.4 Figure 2 Typical Reverse Characteristics - Per Leg .01 5.0 175 Instantaneous Forward Voltage - Volts 0.1 1.0 Figure 4 Forward Current Derating - Per Leg 25 C Maximum Allowable Case Temperature - C Instantaneous Forward Current - Amperes 400 1.0 0.5 Reverse Voltage - Volts 40 50 70 DC 60 120 50 180 90 40 60 30 20 10 0 0 20 40 60 80 100 120 140 160 180 200 Average Forward Current - Amperes www.microsemi.com January, 2010 - Rev. 3