1.5SMB Series
TVS Diodes
Surface Mount – 15000W > 11.5KSSMMBBSseries
RoHS Pb e3
Uni-directional
Bi-directional
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Peak Pulse Power Dissipation by
10/1000μs Waveform (Fig.2)
(Note 1), (Note 2)
Power Dissipation on Infinite Heat
Sink at TL=50OC
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
Maximum Instantaneous Forward
Voltage at 50A for Unidirectional
Only
Operating Temperature Range
Storage Temperature Range
Typical Thermal Resistance Junction
to Lead
Symbol
PPPM
PD
IFSM
VF
TJ
TSTG
RθJL
Typical Thermal Resistance Junction
to Ambient
RθJA
Value
1500
5.0
120
5.0
-65 to 150
-65 to 175
20
100
Unit
W
W
A
V
°C
°C
°C/W
°C/W
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated above TJ (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.
Description
The 1.5SMB Series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Features
• 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
• 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
• 1500W peak pulse power
capability at 10/1000μs
waveform, repetition rate
(duty cycles):0.01%
• Vx(αBR(1T@:+TαeTmJT=pxVeB(rTRa@Jtu-2r25e5°C))
Coefficient, typical value
is 0.1%)
• Excellent clamping
capability
• Low incremental surge
resistance
• Meet MSL level 1 per
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)
Functional Diagram
Cathode
Bi-directional
Uni-directional
Anode
Applications
TVS components are ideal for the protection of I/O
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applications.
©2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/27/19
