SM5A27 Datasheet, PDF (1/2 Pages) General Semiconductor – SURFACE MOUNT AUTOMOTIVE TRANSIENT VOLTAGE SUPPRESSOR

SM5A27
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 TJ=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
DO-218
0.628(16.0)
0.592(15.0)
0.539(13.7)
0.524(13.3)
0.413(10.5) 0.342(8.7)
0.374(9.5) 0.327(8.3)
0.116(3.0)
0.093(2.4)
0.366(9.3)
0.343(8.7)
0.406(10.3)
0.382(9.7)
0.197(5.0)
0.185(4.7)
LEAD 1
0.138(3.5)
0.098(2.5)
0.028(0.7)
0.012(0.3)
LEAD 2/METAL HEATSINK
0.028(0.7)
0.020(0.5)
0.098(2.5)
0.059(1.5)
Patent #Õs, 4,980,315,
5,166,769,
5,278,095
Dimensions in inches
and
(millimeters)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25¡C ambient temperature unless otherwise specified.
Steady state power dissipation
Non-repetitive peak reverse surge current for 10ms/10ms
exponentially decaying waveform
Maximum working peak stand-off voltage
Minimum reverse zener voltage at 10mA
Maximum reverse zener voltage at 10mA
Maximum zener voltage temperature coefficient at IZ=10mA
Peak forward surge current, 8.3ms single half sine-wave
Maximum clamping voltage for 10ms/10ms exponentially
decaying waveform at IPP=55A
Maximum instantaneous forward voltage at 6.0A (NOTE 1)
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
SYMBOLS
PD
IRSM
VWM
VZ
VZ
VZTC
IFSM
VC
VF
IR
RQJC
TJ, TSTG
SM5A27
5.0
70.0
22.0
24.0
30.0
36.0
500.0
40.0
1.0
0.2
10.0
1.0
-55 to +175
UNITS
Watts
Amps
Volts
Volts
Volts
mV/¡C
Amps
Volts
Volts
mA
¡C/W
¡C
NOTE:
(1) Measured on a 300ms square pulse width
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