Silicon Avalanche Diodes
500 Watt Axial Leaded Transient Voltage Suppressors
RoHS
SA Series
®
The SA Series is designed specifically to protect sensitive
electronics equipment from voltage transients induced by
lightning and other transient voltage events. These devices are
ideal for the protection of I/O interfaces, Vcc bus and other
vulnerable circuits used in computer and consumer electronic
applications.
FEATURES
•
RoHS
Compliant
•
5.0 to 180 Volts
•
Uni-directional and Bi-directional
•
Glass passivated chip junction
•
500W peak pulse power capability on 10/1000µs waveform
•
Excellent clamping capability
•
Repetition rate (duty cycle): 0.01%
•
Low incremental surge resistance
•
Fast response time: typically less than 1.0ps from 0 Volts to
MAXIMUM RATINGS AND CHARACTERISTICS @25˚C
AMBIENT TEMPERATURE (unless otherwise noted)
RATING
Peak Pulse Power Dissipation on
10/1000µs waveform(Note 1, FIG. 1)
Peak Pulse Current of on 10/1000µs
waveform (Note 1, FIG. 3)
Steady State Power Dissipation at
TL=75˚C, Lead lengths .375",
(9.5mm)(Note 2)
Peak Forward Surge Current, 8.3ms
70
Single Half Sine-Wave Superimposed IFSM
on Rated Load, (JEDEC Method)
(Note 3)
Operating junction and Storage
Tj, TSTG -55 to +175
Temperature Range
Amps
SYMBOL
PPPM
IPPM
VALUE
Min
500
SEE
TABLE 1
3
UNIT
Watts
BV for unidirectional and 5.0ns for bidirectional types
•
Typical IR less than 1µA above 10V
•
High temperature soldering guaranteed: 265˚C/10
seconds/.375",(9.5mm) lead length, 5lbs.,(2.3kg) tension
Amps
Watts
Agency Approvals:
Recognized under the Components
Program of Underwriters Laboratories.
PM(AV)
Agency File Number:
E128662
°C
Notes:
1. Non-repetitive current pulse, per Fig.3 and derated above
TA= 25˚C per Fig.2
2. Mounted on Copper Pad area of 1.6x1.6"(40x40mm)
per Fig.5.
3. 8.3 ms single half sine-wave, or equivalent square wave, Duty
cycle= 4 pulses per minutes maximum.
ORDERING INFORMATION
Voltage
SA
CA
Mechanical Specifications:
Weight:
Case:
Mounting Position:
Polarity:
Terminal:
0.015 ounce, 0.4 gram
JEDEC DO-15 Molded Plastic over
passivated junction
Any
Color band denotes cathode except
Bidirectional
Plated Axial leads, solderable per
MIL-STD-750, Method 2026
Bi-Directional
5% Voltage Tolerance
Packing Option
T = Tape and reeled (4000 pcs)
291
B = Bulk (1000 pcs)
w w w. l i t t e l f u s e . c o m
Silicon Avalanche Diodes
500 Watt Axial Leaded Transient Voltage Suppressors
RoHS
SA Series
10
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage, %
®
30
PPPM- Peak Pulse Power (KW)
Non-repetitive Pulse
Waveform Shown in Fig. 3
TA=25˚C
100
75
50
25
0
1
P
P
P
Td
Exponential
Half SINE
Square
Td
Td
0.1
0.1s
1.0s
Fig. 1 Peak Pulse Power Rating Curve
150
IPPM- Peak Pulse Current, % I RSM
tr=10µsec
Peak Value
IPPM
TJ=25˚C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
td- Pulse Width (sec.)
10s
100s
1.0ms
10ms
0
25
50
6000
CJ-Junction Capacitance (pF)
Fig. 2 Pulse Derating Curve
Uni-Directional
Bi-Directional
TA- Ambient Temperature (˚C)
75
100 125 150 175 200
100
1000
VR=
TJ=25˚C
f=1MHZ
Vsig=50mVp-p
Half Value IPPM
2
50
td
10/1000µsec. Waveform
as defined by R.E.A
100
VR=Rated
Stand-Off Voltage
0
0
1.0
Fig. 3 Pulse Waveform
4.0
IPSM-Peak Forward Surge Current (A)
Steady State Power Dissipation (W)
t-Time (ms)
2.0
3.0
4.0
10
5
Fig. 4- Typical Junction Capacitance
200
100
8.3 Single Half Sine-Wave
(JEDEC Method)
Undirectional Only
VWM-Reverse Stand-Off Voltage (V)
100
500
3.0
2.0
1.0
0
1.6x1.6x.040
(40x40x1mm)
Copper Heat Sinks
L=0.375"(9.5mm)
Lead Lengths
0
25
50
Fig. 5 Steady State Power
Derating Curve
293
T1- Lead Temperature (˚C)
75
100 125 150 175 200
10
1
Fig. 6- Maximum Non-Repetitive
Forward Surge Current
Uni-Directional Only
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Number of Cycles at 60Hz
10
100
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