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 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

5.0

Watts

Non-repetitive peak reverse surge current for 10

ms/10ms

exponentially decaying waveform

70.0

Amps

Maximum working peak stand-off voltage

22.0

Volts

Minimum reverse zener voltage at 10mA

24.0

Volts

Maximum reverse zener voltage at 10mA

30.0

Volts

36.0

mV/¡C

Peak forward surge current, 8.3ms single half sine-wave

500.0

Amps

Maximum clamping voltage for 10

ms/10ms exponentially

40.0

Volts

1.0

Volts

0.2

10.0

mA

Maximum thermal resistance junction to case

1.0

¡C/W

Operating junction and storage temperature range

-55 to +175

¡C

NOTE:

(1) Measured on a 300

ms 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

5,166,769,

5,278,095

PA

TENTED

*