TVS Diodes
1500W > 1.5SMB Series
Surface Mount – 1000W > 1KSMB series
RoHS Pb
e3
1.5SMB Series
Description
Uni-directional
The 1.5SMB Series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Bi-directional
Features
• For surface mounted
applications to optimize
board space
• VBR @TJ= VBR@25°C
x (1+αT x (TJ - 25))
(αT:Temperature
Coefficient, typical value
is 0.1%)
• Excellent clamping
capability
• Low profile package
•Typical failure mode is
short from over-specified
voltage or current
Maximum Ratings andThermal Characteristics
(TA=25OC unless otherwise noted)
• Low incremental surge
resistance
JESD201A per its table 4a • Meet MSL level 1 per
• Whisker test is conducted
based on JEDEC
Parameter
Symbol
PPPM
Value
1500
Unit
W
Peak Pulse Power Dissipation by
10/1000μs Waveform (Fig.2)
(Note 1), (Note 2)
and 4c
J-STD-020, and high
temperature soldering
guaranteed: 260C/10sec
• 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)
• ESD protection of data
lines in accordance with
IEC 61000-4-2, 30kV(Air),
30kV (Contact)
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Built-in strain relief
• Glass passivated chip
junction
Power Dissipation on Infinite Heat
Sink atTL=50OC
PD
5.0
W
A
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
IFSM
120
Maximum Instantaneous Forward
Voltage at 50A for Unidirectional
Only
VF
5.0
V
OperatingTemperature Range
StorageTemperature Range
TJ
-65 to 150
-65 to 175
°C
°C
TSTG
TypicalThermal Resistance Junction
to Lead
20
°C/W
°C/W
RθJL
RθJA
• 1500W peak pulse power
capability at 10/1000μs
waveform, repetition rate
(duty cycles):0.01%
TypicalThermal Resistance Junction
to Ambient
100
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated aboveTJ (initial) =25OC per Fig. 3.
2. Mounted on copper pad area of 0.2x0.2” (5.0 x 5.0mm) to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional
component only, duty cycle=4 per minute maximum.
Functional Diagram
Applications
TVS components are ideal for the protection of I/O
Interfaces, VCC bus and other vulnerable circuits used in
Telecom, Computer, Industrial and Consumer electronic
applications.
Bi-directional
Cathode
Anode
Uni-directional
©2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/27/19