TVS Diodes
Surface Mount > 600W > SZ1SMB Series
Pb
RoHS e3
SZ1SMB Series
Description
The SZ1SMB series is designed to protect voltage
Bi-directional
sensitive components from high voltage, high energy
transients. They have excellent clamping capability, high
surge capability, and fast response time. The SZ1SMB
series is supplied in the Littelfuse exclusive, cost-effective,
highly reliable package and is ideally suited for use in
communication systems, automotive, numerical controls,
process controls, medical equipment, business machines,
power supplies and many other industrial/consumer
applications.
Uni-directional
Features
Zener Transient
Intended for UL 497B Type
Overvoltage Suppressors
Protection
Working Peak Reverse
Response Time is Typically
Agency Approvals Voltage Range 5.0 V to
< 1.0 ns
170 V for uni-directional,
Pb-free means 2nd level
Agency Agency File Number
and 10 V to 75 V for
interconnect is Pb-free
bi-directional
E128662
and the terminal finish
Standard Avalanche material is tin(Sn) (IPC/
Breakdown Voltage Range
JEDEC J-STD-609A.01)
6.4 V to 209 V for uni-
SZ Prefix for Automotive
Maximum Ratings and Thermal Characteristics
directional, 11.1 V to 92.07
and Other Applications
V for
Parameter Symbol Value Unit Requiring Unique Site
bi-directional
and Control Change
Peak Power Dissipation (Note 1) @ T =
L Peak Power 600 W @
P 600 W
Requirements;
PK
25C, Pulse Width = 1 ms
1.0 ms
AECQ101 Qualified and
ESD Rating of Class 3 (>
DC Power Dissipation @ T = 75C
PPAP Capable
L
Measured Zero Lead Length (Note 2) P 3.0 W
D 16 kV) per Human Body
Derate Above 75C 40 mW/C
Model
Thermal Resistance from Junctionto R 25 C/W
JL
Lead
Maximum Clamp Voltage
@ Peak Pulse Current
DC Power Dissipation (Note 3) @ T = P
A D
0.55 W
Low Leakage < 5.0 A
25C Derate Above 25C
4.4 mW/C
Thermal Resistance from Junctionto R
Above 10 V
JA
226 C/W
Ambient
Additional Information
Forward Surge Current (Note 4) @ T
A
I 100 A
FSM
= 25C
Operating and Storage Temperature T -65 to
J
C
Range T +150
stg
Samples
Datasheet Resources
Stresses exceeding those listed in the Maximum Ratings table may damage the componant.
If any of these limits are exceeded, device functionality should not be assumed, damage may
occur and reliability may be affected.
1. 10/1000 s, nonrepetitive.
2. 1 square copper pad, FR4 board.
3. FR4 board, using Littelfuse minimum recommended footprint
4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per
minute maximum - For Unidirectional only.
2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/20/19TVS Diodes
Surface Mount > 600W > SZ1SMB Series
Functional Diagram
Bi-directional
Cathode
Anode
Uni-directional
I-V Curve Characteristics (T = 25C unless otherwise noted, V = 3.5 V Max. @ I (Note 5) = 30 A) For Uni-directional
A F F
I
Symbol Parameter
Uni-directional
I Maximum Reverse Peak Pulse Current
PP
V Clamping Voltage @ I
C PP
V Working Peak Reverse Voltage
RWM
I Maximum Reverse Leakage Current @ V
R RWM
V Breakdown Voltage @ I
BR T
Vc VBRVR
V
I On-State Current
IR
VF T
IT
V Forward Voltage @ I
F F
I Forward Current
F
5. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, nonrepetitive duty cycle.
Ipp
I-V Curve Characteristics (T = 25C unless otherwise noted) For Bi-directional
A
Symbol Parameter
I
Bi-directional I Maximum Reverse Peak Pulse Current
PP
Ipp
V Clamping Voltage @ I
C PP
V Working Peak Reverse Voltage
RWM
I Maximum Reverse Leakage Current @ V
R RWM
V Breakdown Voltage @ I
IT BR T
IR
Vc VBRVR
I On-State Current
V T
IR
VRVBRVc
IT
Ipp
2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/20/19