TVS Diodes Surface Mount > 400W > SZ1SMA Series RoHS Pb e3 SZ1SMA Series Description The SZ1SMA series is designed to protect voltage sensitive Bi-directional components from high voltage, high energy transients. They have excellent clamping capability, high surge capability, low zener impedance and fast response time. The SZ1SMA 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 Uni-directional consumer applications. Features Zener Transient Package Design for Top Overvoltage Suppressors Slide or Bottom Circuit Board Mounting Working Peak Reverse Agency Approvals Voltage Range 5V to Low Profile Package 170V for uni-directional Pb-free means 2nd level Agency Agency File Number and 10 V to 78 V for bi- interconnect is Pb-free directional E128662 and the terminal finish Standard Zener material is tin(Sn) (IPC/ Breakdown Voltage Range JEDEC J-STD-609A.01) 11.1 V to 95.83 V for bi- SZ Prefix for Automotive Maximum Ratings and Thermal Characteristics directional, 6.4 V to 209 V and Other Applications for uni-directional Requiring Unique Site Parameter Symbol Value Unit Peak Power 400 W 1 and Control Change Peak Power Dissipation (Note 1) T = 25C, ms Requirements AEC L P 400 W PK Pulse Width = 1 ms Q101 Qualified and PPAP ESD Rating of Class 3 (> Capable DC Power Dissipation TL = 75C Measured 16 kV) per Human Body P 1.5 W D Zero Lead Length (Note 2) Recognized to UL 497B 20 mW/C Model Derate Above 75C R 50 C/W as an Isolated Loop Circuit JL Thermal Resistance from JunctiontoLead Response Time is Typically Protector < 1 ns RoHS-compliant and DC Power Dissipation (Note 3) TA = 25C P 0.5 W D halogin-free Derate Above 25C 4.0 mW/C Flat Handling Surface for Thermal Resistance from Junctionto Ambient R 250 C/W JA Accurate Placement Forward Surge Current (Note 4) TA = 25C I 40 A Additional Information FSM (for uni-directional) T J Operating and Storage Temperature Range -65 to +150 C T stg Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Samples Datasheet Resources 1. 10 X 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 uni- directional) Functional Diagram Bi-directional Cathode Anode Uni-directional 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 12/18/20TVS Diodes Surface Mount > 400W > SZ1SMA Series I-V Curve Characteristics (T = 25C unless otherwise noted) For Bi-directional A Symbol Parameter I Maximum Reverse Peak Pulse Current PP I PP V Clamping Voltage I C PP V Working Peak Reverse Voltage RWM I Maximum Reverse Leakage Current V R RWM I T I V Breakdown Voltage I V V V C BR RWM R BR T I Test Current I V V V T R RWM BR C I T I PP For Bi-directional I-V Curve Characteristics (T = 25C unless otherwise noted, V = 3.5 V Max. I = 30 A for all types) (Note 5) For Uni-directional A F F Symbol Parameter I 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 V BR T I Test Current T I Forward Current F V Forward Voltage I F F 5. 1/2 sine wave or equivalent, PW = 8.3 ms, nonrepetitive duty cycle. For Uni-directional 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 12/18/20