Schottky Power Surface Mount FST81SM1-SM6 Series A1 K F 1 2 Minimum Maximum Minimum Maximum Notes 1 E 3 2 3 1 2 3 Common Cathode L M SM3 & SM4 3 PINS eq sp at .200 G A3 J C SM1 & SM2 B D H B D Millimeter Dim. Inches A2 N 2-PLCS. 1 2 1 2 3 A=Common Anode 3 SM5 & SM6 TYP. PIN CONFIGURATION TYP. PIN CONFIGURATION FOR SM1, SM3, & SM5 FOR SM2, SM4, & SM6 1 2 3 D=Doubler A1 A2 A3 B C D E F G H 1.490 1.020 .695 .110 .027 .100 .350 .015 .695 .088 1.510 1.040 .715 .120 .037 .110 .370 .025 .715 .098 37.85 26.12 17.65 2.79 0.69 2.54 8.89 0.38 17.65 2.24 38.35 26.42 18.16 3.04 0.94 2.79 9.40 0.64 18.16 2.49 J K L M N .240 1.180 .230 .065 .151 .260 1.195 .250 .085 .161 6.10 29.97 5.84 1.65 3.84 6.60 30.35 6.35 2.16 4.09 Dia. Note: Baseplate Common with Pin 2 Microsemi Catalog Catalog Number 1 2 FST8135SM _ _ FST8140SM _ _ FST8145SM _ _ Industry Part Number Working Peak Reverse Voltage Repetitive Peak Reverse Voltage 80CNQ035ASL 80CNQ035ASM 80CNQ040ASL 80CNQ040ASM 80CNQ045ASL 80CNQ045ASM 35V 35V 40V 40V 45V 45V Note: 1 Specify (1-6) to identify package desired Schottky Barrier Rectifier Guard Ring Protection Common Cathode Center Tap Low Forward Voltage 2 X 40 Amperes Avg. 150°C Junction Temperature Reverse Energy Tested ROHS Compliant 2 Specify C-Common Cathode, A-Common Anode, D-Doubler Electrical Characteristics Average forward current per pkg Average forward current per leg Maximum surge current per leg Max repetitive peak reverse 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) 80 Amps I F(AV) 40 Amps I FSM 800 Amps I R(OV) 2 Amps VFM 0.47 volts VFM 0.53 volts I RM 500 mA I RM 3.0 mA CJ 2100 pF TC = 110°C, Square wave, R 0JC = 0.5°C/W TC = 110°C, Square wave, R 0JC = 1.0°C/W 8.3 ms, half sine, T J = 150°C f = 1 KHZ, 25°C, 1µsec square wave I FM = 40A: T J = 150°C* I FM = 40A: T J = 25°C* VRRM, T C = 125°C* VRRM, T J = 25°C VR = 5.0V, T C = 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 Base Torque Weight T STG TJ R OJC R OJC R OCS -55°C to 175°C -55°C to 150°C 1.0°C/W Junction to case Junction to case 0.5°C/W Case to sink 0.3°C/W 10 inch pounds maximum (SM1, 2) SM1-2 0.3 ounce (8.4 grams) typical SM3-4 0.24 ounce (6.7 grams) typical SM5-6 0.18 ounce (5.2 grams) typical www.microsemi.com January, 2010 - Rev. 4 FST81SM1 - SM6 Figure 3 Typical Junction Capacitance - Per Leg 1000 10000 800 6000 600 4000 Junction Capacitance - pF Figure 1 Typical Forward Characteristics - Per Leg 400 200 100 80 2000 1000 60 600 400 200 100 0.1 20 150 C 10 25 C 8.0 6.0 4.0 2.0 1.0 0 0.2 0.4 0.6 0.8 1.0 1.2 50 100 130 120 110 100 90 0 Maximum Power Dissipation - Watts 125 C 75 C 1.0 25 C .01 10 20 Reverse Voltage - Volts 30 0.5 10 15 20 25 120 30 35 180 40 DC 45 50 Figure 5 Maximum Forward Power Dissipation - Per Leg 150 C 0 90 60 80 Average Forward Current - Amperes 1000 Typical Reverse Current - Amperes 10 140 1.4 Figure 2 Typical Reverse Characteristics - Per Leg 0.1 5.0 150 Instantaneous Forward Voltage - Volts 10 1.0 Figure 4 Forward Current Derating - Per Leg Maximum Allowable Case Temperature - C Instantaneous Forward Current - Amperes 40 100 0.5 Reverse Voltage - Volts 40 50 35 30 DC 180 25 60 20 90 120 15 10 5.0 0 0 5.0 10 15 20 25 30 35 40 45 Average Forward Current - Amperes www.microsemi.com January, 2010 - Rev. 4 50