Document
SZ1SMB Series
Surface Mount
TVS Diode Datasheet
RoHS
Pb e3
Bi-directional
Description
The SZ1SMB series is designed to protect voltage 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
Additional Information
Resources
Accessories
Samples
Agency
Agency Approvals
Agency File Number E128662
Maximum Ratings and Thermal Characteristics
Parameter
Symbol Value Unit
Peak Power Dissipation (Note 1) @ TL = 25°C, Pulse Width = 1 ms
PPK
DC Power Dissipation @ TL = 75°C
Measured Zero Lead Length(Note 2)
PD
Derate Above 75°C
RƟJL
Thermal Resistance from Junction−to−Lead
DC Power Dissipation(Note 3) @ TA = 25°C
Derate Above 25°C
PD
Thermal Resistance from Junction–to–
RƟJA
Ambient
Forward Surge Current (Note 4) @ TA = 25°C IFSM
Operating and Storage Temperature Range
TJ Tstg
600 W
3.0 W 40 mW/°C 25 °C/W
0.55 W 4.4 mW/°C 100 °C/W
100 A
-65 to +150
°C
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 µs, non−repetitive. 2. 1” square copper pad, FR−4 board. 3. FR−4 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.
Features & Benefits
■ Zener Transient Overvoltage Suppressors
■ Working Peak Reverse Voltage Range − 5.0 V to 170 V for uni-directional, and 10 V to 75 V for bi-directional
■ Standard Avalanche Breakdown Voltage Range −6.4 V to 209 V for unidirectional, 11.1 V to 92.07 V for bi-directional
■ Peak Power − 600 W @ 1.0 ms
■ ESD protection of data lines in accordance with IEC 61000-4-2 30kV(Air), 30kV (Contact)
■ ESD Rating of Class 3 (> 16 kV) per Human Body Model
■ Maximum Clamp Voltage @ Peak Pulse Current
■ VBR @TJ = VBR@25°C x (1+αT x (TJ - 25)) (αT: Temperature Coefficient)
■ Low Leakage < 5.0 µA Above 10 V
■ Intended for UL 497B Type Protection
■ Response Time is Typically < 1.0 ns
■ Pb-free means 2nd level interconnect is Pb-free and the terminal finish material is tin(Sn) (IPC/JEDEC J-STD609A.01)
■ SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC− Q101 Qualified and PPAP Capable
Functional Diagram
Cathode
Bi-directional Uni-directional
Anode
© 2023 Littelfuse, Inc.
1
Specifications are subject to change without notice.
Revised: GD. 07/17/23
SZ1SMB Series
Surface Mount
TVS Diode Datasheet
I-V Curve Characteristics (TA = 25°C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 5) = 30 A) For Uni-directional
Uni-directional
Vc VBR VR
IR VF IT
Symbol
Parameter
IPP
Maximum Reverse Peak Pulse Current
VC
Clamping Voltage @ IPP
VRWM
Working Peak Reverse Voltage
IR
Maximum Reverse Leakage Current @ VRWM
VBR
Breakdown Voltage @ IT
V
IT
Breakdown Current
VF
Forward Voltage @ IF
IF
Forward Current
5. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, non−repetitive duty cycle.
Ipp
Bi-directional Ipp
Vc VBR VR
IT IR
IR IT
I-V Curve Characteristics (TA = 25°C unless otherwise noted) For Bi-directional
V VR VBR Vc
Symbol
IPP VC VRWM IR VBR IT
Parameter
Maximum Reverse Peak Pulse Current Clamping Voltage @ IPP Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT On-State Current
Ipp
© 2023 Littelfuse, Inc.
2
Specifications are subject to change without notice.
Revised: GD. 07/17/23
SZ1SMB Series
Surface Mount
TVS Diode Datasheet
Device
Device Marking
SZ1SMB5.0AT3G
KE
SZ1SMB6.0AT3G
KG
SZ1SMB6.5AT3G
KK
SZ1SMB7.0AT3G
KM
SZ1SMB7.5AT3G
KP
SZ1SMB8.0AT3G
KR
SZ1SMB8.5AT3G
KT
SZ1SMB9.0AT3G
KV
SZ1SMB10AT3G
KX
SZ1SMB11AT3G
KZ
SZ1SMB12AT3G
LE
SZ1SMB13AT3G
LG
SZ1SMB14AT3G
LK
SZ1SMB15AT3G
LM
SZ1SMB16AT3G
LP
SZ1SMB17AT3G
LR
SZ1SMB18AT3G
LT
SZ1SMB20AT3G
LV
SZ1SMB22AT3G
LX
SZ1SMB24AT3G
LZ
SZ1SMB26AT3G
ME
SZ1SMB28AT3G
MG
SZ1SMB30AT3G
MK
SZ1SMB33AT3G
MM
SZ1SMB36AT3G
MP
SZ1SMB40AT3G
MR
SZ1SMB43AT3G
MT
SZ1SMB45AT3G
MV
SZ1SMB48AT3G
MX
SZ1SMB51AT3G
MZ
SZ1SMB54AT3G
NE
SZ1SMB58AT3G
NG
SZ1SMB60AT3G
NK
SZ1SMB64AT3G
NM
SZ1SMB70AT3G
NP
SZ1SMB75AT3G
NR
SZ1SMB78AT3G
NT
SZ1SMB85AT3G
NV
SZ1SMB90AT3G
NX
SZ1SMB100AT3G
NZ
SZ1SMB110AT3G
PE
SZ1SMB120AT3G
PG
SZ1SMB130AT3G
PK
SZ1SMB150AT3G
PM
SZ1SMB160AT3G
PP
SZ1SMB170AT3G
PR
Electrical Characteristics - For Uni-directional
VRWM
(Note 6)
V.