SM5A27 GE | Alldatasheet
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Technical content
SM5A27 TRANSIENT SUPPRESSOR SURFACE MOUNT AUTOMOTIVE TRANSIENT VOLTAGE SUPPRESSOR Zener Voltage - 27.0 Volts Peak Pulse Current - 70.0 Amps
FEATURES
¨ 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 T J=175¡C ¨ Low forward voltage drop ¨ High temperature soldering guaranteed: 260¡C for 10 seconds at terminals MECHANICAL DATA 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 SM5A27 UNITS Steady state power dissipation P D 5.0 Watts Non-repetitive peak reverse surge current for 10 ms/10ms exponentially decaying waveform IRSM 70.0 Amps Maximum working peak stand-off voltage V WM 22.0 Volts Minimum reverse zener voltage at 10mA V Z 24.0 Volts Maximum reverse zener voltage at 10mA V Z 30.0 Volts Maximum zener voltage temperature coefficient at I Z=10mA V ZTC 36.0 mV/¡C Peak forward surge current, 8.3ms single half sine-wave I FSM 500.0 Amps Maximum clamping voltage for 10ms/10ms exponentially decaying waveform at IPP=55A VC 40.0 Volts Maximum instantaneous forward voltage at 6.0A (NOTE 1) VF 1.0 Volts Maximum reverse leakage current at rated V WM TJ=25¡C 0.2 TJ=175¡C IR 10.0 mA Maximum thermal resistance junction to case R QJC 1.0 ¡C/W Operating junction and storage temperature range T J, TSTG -55 to +175 ¡C NOTE: (1) Measured on a 300ms square pulse width NOTICE: Advanced product information is subject to change without notice 2/23/99 Dimensions in inches and (millimeters) DO-218 0.093(2.4) 0.116(3.0) 0.059(1.5) 0.098(2.5) 0.098(2.5) 0.138(3.5) 0.366(9.3) 0.343(8.7) 0.406(10.3) 0.382(9.7) 0.342(8.7) 0.327(8.3) 0.413(10.5) 0.374(9.5) 0.539(13.7) 0.524(13.3) LEAD 2/METAL HEATSINK 0.020(0.5) 0.028(0.7) 0.028(0.7) 0.012(0.3) 0.197(5.0) 0.185(4.7) LEAD 1 0.628(16.0) 0.592(15.0) NEW PRODUCT NEW PRODUCT NEW PRODUCT *Patent #Õs, 4,980,315, 5,166,769, 5,278,095 PATENTED
0 25 50 75 100 125 150 175 200 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 0.01 0.1 100 0 5 10 15 20 25 30 35 400 100 150 0.01 0.1 1 10 100 0.01 0.1 100 5 20 35 50 65 80 95 0.0001 0.001 0.01 0.1 100 25 50 75 100 125 150 1,000 1,500 2,500 3,000 175 500 2,000 10 100 1,000 10,000 FIG. 1 - POWER DERATING CURVE FIG. 3 - PULSE WAVEFORM POWER DISSIPATION, WATTS CASE TEMPERATURE, ¡C FIG. 2 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS INSTANTANEOUS FORWARD CURRENT, AMPS FORWARD VOLTAGE, VOLTS 175¡C INPUT PEAK PULSE CURRENT % t, TIME, ms tr=10ms PEAK VALUE IPP TA=25¡C PULSE WIDTH (td) is DEFINED as the POINT WHERE the PEAK CURRENT DECAYS to 50% of I PP FIG. 4 - REVERSE POWER CAPABILITY REVERSE SURGE POWER, WATTS PULSE WIDTH (ms) - 1/2 IPP EXPONENTIAL WAVEFORM FIG. 6 - TYPICAL REVERSE CHARACTERISTICS FIG. 7 - TYPICAL TRANSIENT THERMAL IMPEDANCE PERCENTAGE OF V(BR), % PULSE WIDTH, sec. 175¡C FIG. 5 - LOAD DUMP POWER CHARACTERISTICS (10ms EXPONENTIAL WAVEFORM) LOAD DUMP POWER, WATTS TRANSIENT THERMAL IMPEDANCE, ¡C/W CASE TEMPERATURE, ¡C RQJC RQJA 25¡C 25¡C RATINGS AND CHARACTERISTIC CURVES SM5A27 td HALF VALUE - IPP INSTANTANEOUS REVERS CUR- RENT, MICRO AMPERES