NEW PRODUCT NEW PRODUCT NEW PRODUCT SM6A27 TRANSIENT SUPPRESSOR SURFACE MOUNT AUTOMOTIVE TRANSIENT VOLTAGE SUPPRESSOR Zener Voltage - 27.0 Volts Peak Pulse Current - 90.0 Amps DO-218 * ED T FEATURES 0.628(16.0) 0.592(15.0) EN T PA 0.539(13.7) 0.524(13.3) 0.116(3.0) 0.093(2.4) 0.413(10.5) 0.342(8.7) 0.374(9.5) 0.327(8.3) 0.366(9.3) 0.343(8.7) 0.406(10.3) 0.382(9.7) LEAD 1 0.138(3.5) 0.098(2.5) 0.197(5.0) 0.185(4.7) ¨ Ideally suited for load dump protection ¨ Plastic package has Underwriters Laboratory Flammability Classification 94V-0 ¨ High temperature stability due to unique oxide passivation ¨ Exclusive patented PARª oxide passivated chip construction ¨ Integrally molded heatsink provides a very low thermal resistance for maximum heat dissipation ¨ Low leakage current at TJ=175¡C ¨ Low forward voltage drop ¨ High temperature soldering guaranteed: 260¡C for 10 seconds at terminals MECHANICAL DATA 0.028(0.7) 0.020(0.5) 0.028(0.7) 0.012(0.3) 0.098(2.5) 0.059(1.5) LEAD 2/METAL HEATSINK *Patent #Õs, 4,980,315, 5,166,769, 5,278,095 Dimensions in inches and (millimeters) Case: Molded plastic body, surface mount with heatsink integrally mounted in the encapsulation Terminals: Plated, solderable per MIL-STD-750, Method 2026 Polarity: Heatsink is anode Mounting Position: Any Weight: 0.091 ounce, 2.58 grams MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25¡C ambient temperature unless otherwise specified. SYMBOLS SM6A27 UNITS PD 6.0 Watts Non-repetitive peak reverse surge current for 10ms/10ms exponentially decaying waveform IRSM 90.0 Amps Maximum working peak stand-off voltage VWM 22.0 Volts Minimum reverse zener voltage at 10mA VZ 24.0 Volts Steady state power dissipation VZ 30.0 Volts Maximum zener voltage temperature coefficient at IZ=10mA VZTC 36.0 mV/¡C Peak forward surge current, 8.3ms single half sine-wave IFSM 600.0 Amps Maximum clamping voltage for 10ms/10ms exponentially decaying waveform at IPP=65A VC 40.0 Volts Maximum instantaneous forward voltage at 6.0A (NOTE 1) VF 0.99 Volts IR 0.5 20.0 mA RQJC 0.95 ¡C/W TJ, TSTG -55 to +175 ¡C Maximum reverse zener voltage at 10mA Maximum reverse leakage current at rated VWM TJ=25¡C TJ=175¡C Maximum thermal resistance junction to case Operating junction and storage temperature range NOTE: (1) Measured on a 300ms square pulse width NOTICE: Advanced product information is subject to change without notice 2/23/99 RATINGS AND CHARACTERISTIC CURVES SM6A27 FIG. 2 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS INSTANTANEOUS FORWARD CURRENT, AMPS FIG. 1 - POWER DERATING CURVE POWER DISSIPATION, WATTS 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 0 25 50 75 100 125 150 175 200 100 175¡C 25¡C 10 1 0.1 0.01 0.35 0.45 CASE TEMPERATURE, ¡C FIG. 4 - REVERSE POWER CAPABILITY FIG. 3 - PULSE WAVEFORM 10,000 TA=25¡C PULSE WIDTH (td) is DEFINED as the POINT WHERE the PEAK CURRENT DECAYS to 50% of IPP tr=10ms PEAK VALUE IPP HALF VALUE - IPP 2 50 10/1000ms 0 td 0 5 10 15 20 25 t, TIME, ms 30 35 40 REVERSE SURGE POWER, WATTS INPUT PEAK PULSE CURRENT % 150 100 1,000 100 10 PULSE WIDTH (ms) - 1/2 IPP EXPONENTIAL WAVEFORM FIG. 5 - LOAD DUMP POWER CHARACTERISTICS (10ms EXPONENTIAL WAVEFORM) FIG. 6 - TYPICAL REVERSE CHARACTERISTICS 6,000 INSTANTANEOUS REVERS CURRENT, MICRO AMPERES 100 5,000 4,000 3,000 2,000 1,000 0 50 25 TRANSIENT THERMAL IMPEDANCE, ¡C/W LOAD DUMP POWER, WATTS 0.95 0.85 0.75 0.65 0.55 FORWARD VOLTAGE, VOLTS 10 175¡C 1 0.1 0.01 25¡C 0.001 0.0001 65 50 35 20 5 150 175 125 100 75 PERCENTAGE OF V(BR), % CASE TEMPERATURE, ¡C FIG. 7 - TYPICAL TRANSIENT THERMAL IMPEDANCE 95 80 100 RQJA 10 RQJC 1 0.1 0.01 0.01 0.1 1 PULSE WIDTH, sec. 10 100