
Silicon Avalanche Diodes
291
www .littelfuse .com
500 Watt Axial Leaded Transient Voltage Suppressors
MAXIMUM RATINGS AND CHARACTERISTICS @25C
AMBIENT TEMPERATURE (unless otherwise noted)
UNIT
Watts
Amps
Watts
Amps
°C
Notes:
1. Non-repetitive current pulse, per Fig.3 and derated above
TA= 25C 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.
The SA Series is designed specifically to protect sensitive
electronics equipment from voltage transients induced by
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 10/1000s 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
BV for unidirectional and 5.0ns for bidirectional types
Typical IR less than 1A above 10V
High temperature soldering guaranteed: 265C/10
seconds/.375",(9.5mm) lead length, 5lbs.,(2.3kg) tension
Agency Approvals: Recognized under the Components
Program of Underwriters Laboratories.
Agency File Number: E128662
SA
C A
Voltage
Bi-Directional
5%Voltage Tolerance
Packing Option
B = Bulk (1000 pcs)
T = Tape and reeled (4000 pcs)
SYMBOL
PPPM
IPPM
PM(AV)
IFSM
Tj, TSTG
VALUE
Min
500
SEE
TABLE 1
3
70
-55 to +175
RATING
Peak Pulse Power Dissipation on
10/1000s waveform(Note 1, FIG. 1)
Peak Pulse Current of on 10/1000s
waveform (Note 1, FIG. 3)
Steady State Power Dissipation at
TL=75C, Lead lengths .375",
(9.5mm)(Note 2)
Peak Forward Surge Current, 8.3ms
Single Half Sine-Wave Superimposed
on Rated Load, (JEDEC Method)
(Note 3)
Operating junction and Storage
Temperature Range
Mechanical Specifications:
Weight:
0.015 ounce, 0.4 gram
Case:
JEDEC DO-15 Molded Plastic over
passivated junction
Mounting Position:
Any
Polarity:
Color band denotes cathode except
Bidirectional
Terminal:
Plated Axial leads, solderable per
MIL-STD-750, Method 2026
ORDERING INFORMATION
SA Series
RoHS