TVS Diodes
Surface Mount > 600W > SZ1SMB Series
Pb e3
RoHS
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 and high surge
capability, as well as 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 and consumer
applications.
Uni-directional
Features
Zener Transient Low Leakage < 5.0 A
Overvoltage Suppressors Above 10 V
Intended for UL 497B Type
Working Peak Reverse
Agency Approvals
Protection
Voltage Range 5.0 V to
170 V for uni-directional,
Response Time is Typically
Agency Agency File Number
and 10 V to 75 V for
< 1.0 ns
E128662
bi-directional
Pb-free means 2nd level
Standard Avalanche
interconnect is Pb-free
Breakdown Voltage
and the terminal finish
Range 6.4 V to 209 V for
material is tin(Sn) (IPC/
Maximum Ratings and Thermal Characteristics
uni-directional, 11.1 V to
JEDEC J-STD-609A.01)
92.07 V for
SZ Prefix for Automotive
Parameter Symbol Value Unit
bi-directional
and Other Applications
Peak Power Dissipation (Note 1) @ T = 25C,
L
P 600 W
Peak Power 600 W @
PK Requiring Unique Site
Pulse Width = 1 ms
1.0 ms
DC Power Dissipation @ T = 75C Measured Zero 3.0 W and Control Change
L
P
D
Lead Length (Note 2) Derate Above 75C 40 mW/C
Requirements;
ESD Rating of Class 3 (>
R
JL
Thermal Resistance from JunctiontoLead 25 C/W
16 kV) per Human Body AECQ101 Qualified and
DC Power Dissipation (Note 3) @ T = 25C Derate 0.55 W
A
P
D PPAP Capable
Model
Above 25C 4.4 mW/C
R
JA
Thermal Resistance from Junctionto Ambient 226 C/W
Maximum Clamp Voltage
Forward Surge Current (Note 4) @ T = 25C I 100 A
@ Peak Pulse Current
A FSM
T -65 to
J
Operating and Storage Temperature Range C
T +150
stg
Additional Information
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.
Samples
Datasheet Resources
Functional Diagram
Bi-directional
Cathode
Anode
Uni-directional
2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/29/20TVS Diodes
Surface Mount > 600W > SZ1SMB Series
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
Uni-directional Symbol Parameter
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 VBR
VR
V
I Breakdown 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
Bi-directional
Symbol Parameter
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
IT V Breakdown Voltage @ I
BR T
IR
Vc VBR VR
V I On-State Current
T
IR
VR VBR Vc
IT
Ipp
2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/29/20