AVALANCHE ALTERNATOR RECTIFIER - AS3524 AND AS3528
PASSIVATED ANISOTROPIC RECTIFIER TECHNOLOGY
Mean Breakdown Voltage - 24 and 28 Volts Peak Pulse Current - 65 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 leakage current at T
J
=175¡C
¨ 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
AS3524
AS3528
UNITS
Maximum working peak stand-off voltage
V
WM
18.0
20.0
Volts
Minimum reverse breakdown voltage at 100mA
V
(BR)
20.0
24.0
Volts
Maximum reverse breakdown voltage at 100mA
V
(BR)
28.0
32.0
Volts
Maximum clamping voltage for 10
ms/10ms exponentially
decaying waveform at I
PP
=60A
V
C
38.0
40.0
Volts
Maximum average rectified forward current at T
C
=150¡C
I
(AV)
35.0
Amps
Peak forward surge current, 8.3ms single half sine-wave
on rated load (JEDEC Method)
I
FSM
600.0
Amps
Maximum instantaneous forward voltage at 100A
(NOTE 1)
V
F
1.00
Volts
Non-repetitive peak reverse surge current for 10
ms/10ms
exponentially decaying waveform
I
RSM
65.0
Amps
Maximum reverse leakage current at rated V
WM
T
J
=25¡C
0.5
T
J
=175¡C
I
R
20.0
mA
Maximum thermal resistance junction to case
(NOTE 2)
R
QJC
0.95
¡C/W
Operating junction and storage temperature range
T
J
, T
STG
-55 to +200
¡C
NOTES:
(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
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)
PA
TENTED*
Dimensions in inches and (millimeters)
*
Patent #Õs 4,980,315
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
0
5
10
15
20
25
30
35
40
0
50
100
150
1
10
100
1,000
10,000
5.0
20
35
50
65
80
95
0.0001
0.001
0.01
0.1
1
10
100
0
20
40
60
80
100 120 140 160 180 200
0
5.0
10
15
20
25
30
35
40
45
50
25
50
75
100
125
150
175
200
0
500
1,000
1,500
2,000
2,500
3,000
0.35
0.45
0.55
0.65
0.75
0.85
0.95
0.01
0.1
1
10
100
1.05
0.01
0.1
1
10
100
0.01
0.1
1
10
100
FOR
W
ARD CURRENT
,
AMPERES
CASE TEMPERATURE, ¡C
FIG. 2 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
INST
ANT
ANEOUS FOR
W
ARD CUR-
RENT
, AMPERES
FORWARD VOLTAGE, VOLTS
175¡C
I
PPM
PEAK PULSE CURRENT
%
t, TIME, ms
t
r
=10
ms
PEAK VALUE I
PPM
T
A
=25¡C
PULSE WIDTH (t
d
) is
DEFINED as the POINT
WHERE the PEAK CURRENT
DECAYS to 50% of I
PP
FIG. 4. - REVERSE POWER CAPABILITY
REVERSE SURGE POWER, W
A
TTS
PULSE WIDTH (ms) - 1/2 I
PP
EXPONENTIAL WAVEFORM
FIG. 6 - TYPICAL REVERSE CHARACTERISTICS
FIG. 7 - TYPICAL TRANSIENT THERMAL IMPEDANCE
PERCENTAGE OF V
(BR)
, %
PULSE WIDTH, sec.
200¡C
175¡C
FIG. 5 - LOAD DUMP POWER CHARACTERISTICS
(10ms EXPODENTIAL WAVEFORM)
LOAD DUMP
POWER, W
A
TTS
TRANSIENT
THERMAL
IMPEDANCE, ¡C/W
TEMPERATURE, ¡C
R
QJC
25¡C
25¡C
RATING AND CHARACTERISTIC CURVES AVALANCHE ALTERNATOR RECTIFIER - AS3524 AND AS3528
FIG. 1 - FORWARD CURRENT DERATING CURVE
FIG. 3 - PULSE WAVEFORM
t
d
HALF VALUE -
I
PP
2
INST
ANT
ANEOUS REVERS CUR-
RENT
, MICRO
AMPERES
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