AVALANCHE ALTERNATOR RECTIFIER AS4024 AND AS4028

PASSIVATED ANISOTROPIC RECTIFIER TECHNOLOGY

Mean Breakdown Voltage - 24 and 28 volts

Peak Pulse Current - 80 Amperes

FEATURES

¨ Plastic package has Underwriters Laboratory

Flammability Classification 94V-0

¨ High temperature stability due to unique oxide

passivation

¨ Patented Passivated Anisotropic Rectifier

(PAR) construction

¨ Integrally molded heatsink provides

a very low thermal resistance for

maximum heat dissipation

¨ Low forward voltage drop

¨ Ideally suited for alternator rectification and load dump

protection

¨ 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: Unidirectional as marked

Mounting Position: Any

Weight: 0.095 ounces, 2.68 grams

MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS

Ratings at 25¡C ambient temperature unless otherwise specified.

SYMBOLS

AS4024

AS4028

UNITS

Maximum working peak standoff voltage

18.0

20.0

Volts

Minimum reverse breakdown voltage at 100mA

20.0

24.0

Volts

Maximum reverse breakdown voltage at 100mA

28.0

32.0

Volts

Maximum clamping voltage for 10

ms/10ms exponentially

38.0

40.0

Volts

¡C

40.0

Amps

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

700.0

Amps

0.99

Volts

Non- repetitive peak reverse surge current for 10

ms/10ms

exponentially decaying waveform

75.0

Amps

1.0

50.0

mA

R

QJC

0.9

¡C/W

Operating junction and storage temperature range

-55 to +200

¡C

NOTE:

(1) Measured on a 300

ms square pulse width

(2) Mounted on alternator heat sink

NOTICE: Advanced product information is subject to change without notice.

12/98

PA

TENTED*

Dimensions in inches and (millimeters)

5,166,769

5,278,094

For positive polarity use ÒPÓ.suffix, for negative polarity use ÒNÓ suffix

(Polarity refers to lead #1)

NEW PRODUCT

NEW PRODUCT

NEW PRODUCT

CASE STYLE ASC

0.953(24.2)

0.937(23.8)

0.224(5.7)

0.208(4.3)

0.205(5.2)

0.188(4.8)

0.185(4.7)

0.169(4.3)

0.110(2.8)

0.094(2.4)

0.366(9.3)

0.343(8.7)

0.406(10.3)

0.382(9.7)

0.390(9.9)

0.374(9.5)

0.024(5.2)

0.023(.59)

0.205(5.2)

0.188(4.8)

0.087(2.2)

0.071(1.8)

0.342(8.7)

0.327(8.3)

0.098

(2.5)

MIN.

0.539(13.7)

0.524(13.3)

LEAD 2/METAL HEATSINK

LEAD 1

0.413(10.5)

0.374(9.5)

0.197(5.0)

0.185(4.7)

0.028(0.7)

0.012(0.3)