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SMAJ78 数据手册 - Littelfuse（力特）
制造商:
Littelfuse（力特）
分类:
TVS二极管
封装:
DO-214AC
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SMAJ78数据手册
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Transient Voltage Suppression Diodes
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/20/15
Surface Mount – 400W > SMAJ series
Description
Agency Approvals
AGENCY AGENCY FILE NUMBER
E230531
Features
Maximum Ratings and Thermal Characteristics
(T
A
=25
O
C unless otherwise noted)
Parameter Symbol Value Unit
Peak Pulse Power Dissipation at
T
A
=25ºC by 10/1000µs Waveform
(Fig.2)(Note 1), (Note 2), (Note 5)
P
PPM
400 W
Power Dissipation on Infinite Heat
Sink at T
L
=50
O
C
P
D
3.3 W
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
I
FSM
60 A
Maximum Instantaneous Forward
Voltage at 25A for Unidirectional
Only (Note 4)
V
F
3.5/5.0 V
Operating Temperature Range T
J
-65 to 150 °C
Storage Temperature Range T
STG
-65 to 175 °C
Typical Thermal Resistance Junction
to Lead
R
θJL
30
°C/W
Typical Thermal Resistance Junction
to Ambient
R
θJA
120
°C/W
Notes:
1. Non-repetitive current pulse, per Fig.4 and derated above T
J
(initial) =25ºC per Fig. 3.
2. Mounted on 5.0x5.0mm copper pad to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional
device only.
4. V
F
< 3.5V for single die parts and V
F
< 5.0V for stacked-die parts.
5. The P
PPM
of stacked-die parts is 600W and please contact littelfuse for the detail
stacked-die parts.
The SMAJ series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Applications
TVS devices are ideal for the protection of I/O Interfaces,
V
CC
bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic
applications.
• 400W Peak pulse power
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
• Excellent clamping
capability
• Typical I
R
less than 1μA
when V
BR
min>12V
• For surface mounted
applications to optimize
board space
• Low profile package
• Typical failure mode is
short from over-specified
voltage or current
• Whisker test is conducted
based on JEDEC
JESD201A per its table 4a
and 4c
• IEC-61000-4-2 ESD
30kV(Air), 30kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Built-in strain relief
• Fast response time:
typically less than 1.0ps
from 0 Volts to V
BR
min
• Glass passivated junction
• Low inductance
• High temperature
to reflow soldering
guaranteed: 260°C/40sec
• V
BR
@ T
J
= V
BR
@25°C
x (1+
αT x (T
J
- 25))
(
αT:Temperature
Coefficient, typical value
is 0.1%)
• Plastic package is
flammability rated
V-0 per Underwriters
Laboratories
• Meet MSL level1, per
J-STD-020, LF maximun
peak of 260
°C
• Matte tin lead–free Plated
• Halogen free and RoHS
compliant
• Pb-free E3 means 2nd
level interconnect is
Pb-free and the terminal
finish material is tin(Sn)
(IPC/JEDEC J-STD-
609A.01)
SMAJ Series
Uni-directional
Bi-directional
Functional Diagram
Bi-directional
Uni-directional
Cathode
Anode
RoHS
Pb
e3
Datasheet
Additional Infomarion
Resources
Samples
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