CHENMKO ENTERPRISE CO.,LTD SSM34LASPT SURFACE MOUNT SCHOTTKY BARRIER RECTIFIER VOLTAGE RANGE 40 Volts CURRENT 3.0 Amperes FEATURES * Plastic package has Underwriters Laboratory Flammability Classification 94V-0 * For surface mounted applications * Low profile package * Built-in strain relief * Metal silicon junction, majority carrier conduction * Low power loss, high efficiency * High current capability, low forward voltage drop * High surge capability * For use in low voltage high frequency inverters, free wheeling, and polarity protection applications * High temperature soldering guaranteed : 260oC/10 seconds at terminals SMA-S + 0.2 2.6 - 0.2 + 0.2 1.4 - 0.2 + 0.2 3.5 - 0.2 MECHANICAL DATA + 0.02 0.5 - 0.02 Case: JEDEC SMA-S molded plastic Terminals: Solder plated, solderable per MIL-STD-750, Method 2026 0.975 + 0.1 - 0.1 + 0.02 0.2 - 0.02 + 0.02 1.08 - 0.02 + 0.2 4.5 - 0.2 MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS o Ratings at 25 C ambient temperature unless otherwise specified. Single phase, half wave, 60 HZ, resistive or inductive load. For capacitive load, derate current by 20%. Dimensions in millimeters SMA-S MAXIMUM RATINGES ( At TA = 25oC unless otherwise noted ) RATINGS SYMBOL SSM34LAS UNITS Maximum Recurrent Peak Reverse Voltage VRRM 40 Volts Maximum RMS Voltage VRMS 28 Volts Maximum DC Blocking Voltage VDC 20 Volts IO 3.0 Amps IFSM 80 Amps CJ 300 Maximum Average Forward Rectified Current Peak Forward Surge Current 8.3 ms single half sine-wave superimposed on rated load (JEDEC method) Typical Junction Capacitance (Note 2) Typical Thermal Resistance (Note 1) R Operating and Storage Temperature Range JL TJ,TSTG 18 -65 to +125 pF o C/W o C ELECTRICAL CHARACTERISTICS ( At TA = 25oC unless otherwise noted ) CHARACTERISTICS SYMBOL Maximum Instantaneous Forward Voltage at I F =3A VF @ TA = 25oC Maximum Average Reverse Current at VR=20V SSM34LAS UNITS 0.38 Volts 1.2 mAmps 50 mAmps IR o @ TA = 100 C NOTES : 1. Thermal Resistance ( Junction to Lead ) : PC Board Mounted on 0.31 X 0.31" ( 8 X 8mm ) copper pad area. 2. Measured at 1.0 MHZ and applied reverse voltage of 4.0 volts. 2004-08 RATING CHARACTERISTIC CURVES ( SSM34LASPT ) 4.0 3.0 2.0 Single Half Wave 60HZ Resistive or Inductive Load 1.0 0 0 25 50 75 100 125 150 175 o LEAD TEMPERATURE, ( C ) FIG. 2 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS INSTANTANEOUS FORWARD CURRENT, ( A ) AVERAGE FORWARD CURRENT, (A) FIG. 1 - TYPICAL FORWARD CURRENT DERATING CURVE 20 10 1.0 0.1 TJ =25oC Pulse Width=300us 1% Duty Cycle 0 .1 FIG. 3 - TYPICAL REVERSE CHARACTERISTICS .3 .4 .5 .6 .7 .8 .9 1.0 FIG. 4 - MAXIMUM NON-REPETIVE FORWARD SURGE CURRENT 1000 100 PEAK FORWARD SURGE CURRETN(A) 100 TJ = 100oC 10 TJ = 25oC 1.0 0.1 80 8.3ms Single Half Sine-Wave (JEDEC Method) 60 40 20 0 .01 0 20 40 60 80 100 120 1 140 2 PERCENT OF RATED PEAK REVERSE VOLTAGE, ( % ) 4 6 FIG. 5 - TYPICAL JUNCTION CAPACITANCE TJ = 25oC 1000 100 0 .1 .4 8 10 20 40 NUMBER OF CYCLES AT 60 Hz 5000 JUNCTION CAPACITANCE, ( pF ) INSTANTANEOUS REVERSE CURRENT, (mA) .2 INSTANTANEOUS FORWARD VOLTAGE,(V) 1.0 4 10 REVERSE VOLTAGE, ( V ) 40 80 80 100