TVS Diodes Surface Mount > 400W > SZ1SMA Series SZ1SMA Series RoHS Pb e3 Description Bi-directional The SZ1SMA series is designed to protect voltage sensitive 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 consumer applications. Uni-directional Features * Zener Transient Overvoltage Suppressors * Working Peak Reverse Voltage Range -5V to 70V for uni-directional and 10 V to 78 V for bi-directional Agency Approvals Agency Agency File Number * Standard Zener Breakdown Voltage Range -11.1 V to 95.83 V for bidirectional, 6.4 V to 86.0 V for uni-directional E128662 Maximum Ratings and Thermal Characteristics Parameter Symbol Value Unit Peak Power Dissipation (Note 1) @ TL = 25C, Pulse Width = 1 ms PPK 400 W PD 1.5 20 50 W mW/C C/W W mW/C C/W DC Power Dissipation @ TL = 75C Measured Zero Lead Length (Note 2) Derate Above 75C Thermal Resistance from Junction-to-Lead RJL DC Power Dissipation (Note 3) @ TA = 25C Derate Above 25C Thermal Resistance from Junction-to- Ambient RJA 0.5 4.0 250 Forward Surge Current (Note 4) @ TA = 25C (for uni-directional) IFSM 40 A Operating and Storage Temperature Range TJ Tstg -65 to +150 C PD * Peak Power - 400 W @ 1 ms * ESD Rating of Class 3 (> 16 kV) per Human Body Model * Package Design for Top Slide or Bottom Circuit Board Mounting * Low Profile Package * Pb-free means 2nd level interconnect is Pb-free and the terminal finish material is tin(Sn) (IPC/ JEDEC J-STD-609A.01) * SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC- Q101 Qualified and PPAP Capable * Response Time is Typically < 1 ns * Flat Handling Surface for Accurate Placement Additional Information 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. Datasheet Resources Samples 1. 10 X 1000 s, 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 uni-directional) (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/18/19 TVS Diodes Surface Mount > 400W > SZ1SMA Series Functional Diagram Bi-directional Cathode Anode Uni-directional I-V Curve Characteristics (T A = 25C unless otherwise noted) - For Bi-directional Symbol IPP IPP Maximum Reverse Peak Pulse Current VC Clamping Voltage @ IPP VRWM IR IT VC VBR VRWM IR VBR IR VRWM VBR VC IT Parameter IT Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT Test Current IPP For Bi-directional I-V Curve Characteristics (T A = 25C unless otherwise noted, VF = 3.5 V Max. @ IF = 30 A for all types) (Note 5) - For Uni-directional Symbol I Maximum Reverse Peak Pulse Current VC Clamping Voltage @ IPP VRWM IR V Parameter IPP VBR Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT IT Test Current IF Forward Current VF Forward Voltage @ IF For Uni-directional 5. 1/2 sine wave or equivalent, PW = 8.3 ms, non-repetitive duty cycle. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/18/19 TVS Diodes Surface Mount > 400W > SZ1SMA Series Electrical Characteristics - For Uni-directional Device Device Marking V Breakdown Voltage VC @ IPP(Note 8) RWM (Note 10) IR @ VRWM @ IT VC IPP (Note 9) Volts A MIN NOM MAX mA Volts Amps pF VBR @ IT (V) (Note 7) C Typ. Agency Approval SZ1SMA5.0AT3G QE 5.0 400 6.40 6.70 7.00 10 9.2 43.5 2035 X SZ1SMA6.0AT3G QG 6.0 400 6.67 7.02 7.37 10 10.3 38.8 1730 X SZ1SMA6.5AT3G QK 6.5 250 7.22 7.60 7.98 10 11.2 35.7 1605 X SZ1SMA8.0AT3G QR 8.0 25 8.89 9.36 9.83 1 13.6 29.4 1035 X SZ1SMA8.5AT3G QT 8.5 5.0 9.44 9.92 10.40 1 14.4 27.8 1265 X SZ1SMA9.0AT3G QV 9.0 2.5 10.00 10.55 11.10 1 15.4 26.0 1200 X SZ1SMA10AT3G QX 10 2.5 11.10 11.70 12.30 1 17.0 23.5 1090 X SZ1SMA11AT3G QZ 11 2.5 12.20 12.85 13.50 1 18.2 22.0 1000 X SZ1SMA12AT3G RE 12 2.5 13.30 14.00 14.70 1 19.9 20.1 925 X SZ1SMA13AT3G RG 13 2.5 14.40 15.15 15.90 1 21.5 18.6 860 X SZ1SMA14AT3G RH 14 2.5 15.60 16.40 17.20 1 23.2 17.2 800 X SZ1SMA15AT3G RM 15 2.5 16.70 17.60 18.50 1 24.4 16.4 758 X SZ1SMA16AT3G RP 16 2.5 17.80 18.75 19.70 1 26.0 15.4 715 X SZ1SMA17AT3G RR 17 2.5 18.90 19.90 20.90 1 27.6 14.5 680 X SZ1SMA18AT3G RT 18 2.5 20.00 21.05 22.10 1 29.2 13.7 645 X SZ1SMA20AT3G RV 20 2.5 22.20 23.35 24.50 1 32.4 12.3 585 X SZ1SMA22AT3G RX 22 2.5 24.40 25.65 26.90 1 35.5 11.3 540 X SZ1SMA24AT3G RZ 24 2.5 26.70 28.10 29.50 1 38.9 10.3 500 X SZ1SMA26AT3G SE 26 2.5 28.90 30.40 31.90 1 42.1 9.5 460 X SZ1SMA28AT3G SG 28 2.5 31.10 32.75 34.40 1 45.4 8.8 430 X SZ1SMA30AT3G SK 30 1.0 33.30 35.05 36.80 1 48.4 8.3 405 X SZ1SMA33AT3G SM 33 2.5 36.70 38.65 40.60 1 53.3 7.5 375 X SZ1SMA36AT3G SP 36 2.5 40.00 42.10 44.20 1 58.1 6.9 345 X SZ1SMA40AT3G SR 40 2.5 44.40 46.75 49.10 1 64.5 6.2 315 X SZ1SMA43AT3G ST 43 2.5 47.80 50.30 52.80 1 69.4 5.8 295 X SZ1SMA45AT3G SV 45 2.5 50.00 52.65 55.30 1 72.2 5.5 280 X SZ1SMA48AT3G SX 48 2.5 53.30 56.10 58.90 1 77.4 5.2 265 X SZ1SMA54AT3G TE 54 2.5 60.00 63.15 66.30 1 87.1 4.6 240 X SZ1SMA58AT3G TG 58 2.5 64.40 67.80 71.50 1 93.6 4.3 225 X SZ1SMA70AT3G TP 70 2.5 77.80 81.90 86.00 1 113.0 3.5 190 X (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/18/19 TVS Diodes Surface Mount > 400W > SZ1SMA Series Electrical Characteristics - For Bi-directional Device Device Marking VRWM (Note 6) Breakdown Voltage IR @ VRWM Agency Approval @ IT VC IPP Volts A MIN NOM MAX mA Volts Amps QXC 10 2.5 11.10 11.69 12.27 1 17.0 23.5 SZ1SMA12CAT3G REC 12 2.5 13.30 14.00 14.70 1 19.9 20.1 X SZ1SMA13CAT3G RGC 13 2.5 14.40 15.16 15.92 1 21.5 18.6 X SZ1SMA15CAT3G RMC 15 2.5 16.70 17.58 18.46 1 24.4 16.4 X SZ1SMA16CAT3G RPC 16 2.5 17.80 18.74 19.67 1 26.0 15.4 X SZ1SMA10CAT3G VBR @ IT (V) VC @ IPP(Note 8) (Note 7) X SZ1SMA18CAT3G RTC 18 2.5 20.00 21.06 22.11 1 29.2 13.7 X SZ1SMA20CAT3G RVC 20 2.5 22.20 23.37 24.54 1 32.4 12.3 X SZ1SMA24CAT3G RZC 24 2.5 26.70 28.11 29.51 1 38.9 10.3 X SZ1SMA26CAT3G SEC 26 2.5 28.90 30.42 31.94 1 42.1 9.5 X SZ1SMA28CAT3G SGC 28 2.5 31.10 32.74 34.37 1 45.4 8.8 X SZ1SMA30CAT3G SKC 30 2.5 33.30 35.06 36.81 1 48.4 8.3 X SZ1SMA33CAT3G SMC 33 2.5 36.70 38.63 40.56 1 53.3 7.5 X SZ1SMA36CAT3G SPC 36 2.5 40.00 42.11 44.21 1 58.1 6.9 X SZ1SMA40CAT3G SRC 40 2.5 44.40 46.74 49.07 1 64.5 6.2 X SZ1SMA43CAT3G SSC 43 2.5 47.93 50.30 52.70 1 69.0 5.8 SZ1SMA45CAT3G STC 45 2.5 50.02 52.73 55.43 1 71.5 5.6 SZ1SMA48CAT3G SXC 48 2.5 53.30 56.11 58.91 1 77.4 5.2 X SZ1SMA58CAT3G TGC 58 2.5 64.40 67.79 71.18 1 93.6 4.3 X SZ1SMA60CAT3G TKC 60 2.5 66.70 70.21 73.72 1 96.8 4.1 X SZ1SMA70CAT3G TPC 70 2.5 77.80 81.90 85.99 1 113.0 3.5 X SZ1SMA78CAT3G TTC 78 2.5 86.70 91.27 95.83 1 126.0 3.2 X 6. A transient suppressor is normally selected according to the working peak reverse voltage (VRWM), which should be equal to or greater than the DC or continuous peak operating voltage level 7. VBR measured at pulse test current IT at an ambient temperature of 25C 8. Surge current waveform per Figure 2 and derate per Figure 3 9. Bias voltage = 0 V, F = 1.0 MHz, TJ = 25C. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/18/19 TVS Diodes Surface Mount > 400W > SZ1SMA Series Ratings and Characteristic Curves Figure 1. Pulse Rating Curve Figure 2. Pulse Waveform 120 = 10s NONREPETITIVE PULSE WAVEFORM SHOWN IN FIGURE 2. TA=25C 10000 IPPM, Peak Pulse Current (%) Ppk, Peak Power (W) 100000 1000 100 10 0.0001 0.001 0.01 0.1 1 100 Peak Value IPPM 80 60 Half Value - IPP/2 40 10/1000 s Waveform as defined by R.E.A. 20 td 0 10 0 1 tp,Pulse Width (ms) SZ1SMA18CAT3G C, CAPACITANCE (pF) Peak Pulse Derating in of Peak Current (%) 5 SZ1SMA10CAT3G 10/1000 WAVEFORM 80 60 40 20 100 SZ1SMA48CAT3G SZ1SMA78CAT3G 10 TJ= 25C F = 1 MHz 0 40 80 120 160 200 1 TA Ambient Temperature (C) TJ = 25C F = 1 MHz SZ1SMA10AT3G SZ1SMA36AT3G 100 SZ1SMA64AT3G 10 1 10 BIAS VOLTAGE (VOLTS) 10 100 100 Figure 6. Steady State Power Derating P D , MAXIMUM POWER DISSI PATION (WATTS) 10,000 SZ1SMA5.0AT3G 1 BIAS VOLTAGE (VOLTS) Figure 5. Typical Junction Capacitance vs. Bias Voltage C, CAPACITA NCE (pF) 4 1,000 100 1 3 Figure 4. Typical Junction Capacitance vs. Bias Voltage 120 1,000 2 t, Time (ms) Figure 3 - Surge Derating Curve 0 TA= 25C PW (ID) is defined as the point where the peak current decays to 50% of IPP 6 5 4 @ TL = 75C PD = 1.5 W 3 2 @ TA = 25C PD = 0.5 W 1 0 0 25 50 100 75 T, TEMPERA TURE (C) 125 150 (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/18/19 TVS Diodes Surface Mount > 400W > SZ1SMA Series Soldering Parameters Lead-free assembly Pre Heat - Temperature Min (Ts(min)) 150C - Temperature Max (Ts(max)) 200C - Time (min to max) (ts) 60 - 120 secs Ramp-up Average ramp up rate (Liquidus Temp (TL) to peak 3C/second max TS(max) to TL - Ramp-up Rate 3C/second max Reflow tp TP - Temperature (TL) (Liquidus) 217C - Time (min to max) (tL) 60 - 150 seconds Peak Temperature (TP) 260+0/-5 C Time within 5C of actual peak Temperature (tp) 30 seconds max Ramp-down Rate 6C/second max Time 25C to peak Temperature (TP) 8 minutes max. Do not exceed 260C Physical Specifications Weight 0.00246 ounce, 0.0767 grams Case JEDEC DO214AC. Void-Free, Transfer-Molded, Thermosetting Plastic Epoxy Meets UL 94V-0 Polarity Color band denotes cathode for unidirectional components. Terminal Matte Tin-plated leads, Solderable per JESD22-B102 TL Temperature (T) Reflow Condition Critical Zone TL to TP tL Ts(max) Ramp-down Ts(min) ts Preheat 25C t 25C to Peak Time (t) Environmental Specifications High Temp. Storage JESD22-A103 HTRB JESD22-A108 Temperature Cycling JESD22-A104 MSL JEDEC-J-STD-020, Level 1 H3TRB JESD22-A101 RSH JESD22-A111 Dimensions HE Soldering Footprint E 4.000 0.157 bD D The cathode indicator is for uni- devices only 2.000 0.079 A 2.000 0.079 SCALE 8:1 mm inches Ordering Information A1 c L Inches Dim Min Nom Millimeters Max Min Nom Max A 0.078 0.083 0.087 1.97 2.10 2.20 A1 0.002 0.004 0.008 0.05 0.10 0.20 b 0.050 0.057 0.064 1.27 1.45 1.63 c 0.006 0.011 0.016 0.15 0.28 0.41 Device** Package Shipping SZ1SMAxxAT3G SMA (Pb-Free) 5,000 / Tape & Reel D 0.090 0.103 0.115 2.29 2.60 2.92 E 0.160 0.170 0.180 4.06 4.32 4.57 SMA (Pb-Free) 5,000 / Tape & Reel HE 0.190 0.205 0.220 4.83 5.21 5.59 L 0.030 0.045 0.060 0.76 1.14 1.52 SZ1SMAxxCAT3G **The "T3" suffix refers to a 13 inch reel (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/18/19 TVS Diodes Surface Mount > 400W > SZ1SMA Series Part Numbering System Part Marking System 1 Cathode LFXXXX YMAWW SZ 1SMA xx CA T3 G 2 Anode Pb Free Plating Tape/Reel Designator XXXX =Device Code Y =Year M =Month A =Assembly Location WW =Lot Code Type Code CA Bi-Directional TVS A Uni Directional TVS SMA TVS VR VOLTAGE Zener Automotive Tape and Reel Specification 0.157 (4.0) Cathode mark for uni-directional components 0.47 (12.0) 0.315 (8.0) 0.061 DIA (1.55) Cover tape 13.0 (330) 0.80 (20.2) Arbor Hole Dia. 0.52 (13.3) Dimensions are in inches (and millimeters). Direction of Feed Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/18/19