TVS Diodes Surface Mount > 400W > SZ1SMA Series SZ1SMA Series RoHS Pb e3 Description 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. Bi-directional 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 Peak Power Dissipation (Note 1) @ TL = 25C, Pulse Width = 1 ms DC Power Dissipation @ TL = 75C Measured Zero Lead Length (Note 2) Derate Above 75C Thermal Resistance from Junction-to-Lead Symbol Value Unit PPK 400 W PD 1.5 20 50 W mW/C C/W W mW/C C/W RJL DC Power Dissipation (Note 3) @ TA = 25C Derate Above 25C Thermal Resistance from Junction-to- Ambient PD 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 * Peak Power - 400 W @ 1 ms * ESD Rating of Class 3 (> 16 kV) per Human Body Model * Response Time is Typically < 1 ns * Flat Handling Surface for Accurate Placement * 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 * Recognized to UL 497B as an Isolated Loop Circuit Protector *RoHS-compliant 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. 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 unidirectional) Datasheet Resources Samples Functional Diagram Bi-directional Cathode Anode Uni-directional (c) 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/29/20 TVS Diodes Surface Mount > 400W > SZ1SMA Series 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 IPP Maximum Reverse Peak Pulse Current VC Clamping Voltage @ IPP VRWM IR V Parameter VBR Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT IT Test Current IF Forward Current VF Forward Voltage @ IF 5. 1/2 sine wave or equivalent, PW = 8.3 ms, non-repetitive duty cycle. For Uni-directional (c) 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/29/20 TVS Diodes Surface Mount > 400W > SZ1SMA Series Electrical Characteristics - For Uni-directional Device Device Marking SZ1SMA5.0AT3G SZ1SMA6.0AT3G SZ1SMA6.5AT3G SZ1SMA8.0AT3G SZ1SMA8.5AT3G SZ1SMA9.0AT3G SZ1SMA10AT3G SZ1SMA11AT3G SZ1SMA12AT3G SZ1SMA13AT3G SZ1SMA14AT3G SZ1SMA15AT3G SZ1SMA16AT3G SZ1SMA17AT3G SZ1SMA18AT3G SZ1SMA20AT3G SZ1SMA22AT3G SZ1SMA24AT3G SZ1SMA26AT3G SZ1SMA28AT3G SZ1SMA30AT3G SZ1SMA33AT3G SZ1SMA36AT3G SZ1SMA40AT3G SZ1SMA43AT3G SZ1SMA45AT3G SZ1SMA48AT3G SZ1SMA51AT3G SZ1SMA54AT3G SZ1SMA58AT3G SZ1SMA60AT3G SZ1SMA70AT3G QE QG QK QR QT QV QX QZ RE RG RH RM RP RR RT RV RX RZ SE SG SK SM SP SR ST SV SX SZ TE TG TK TP VRWMNote 6 Breakdown Voltage IR @ VRWM VC @ IPPNote 8 VBR @ IT (V) Note 7 @ IT VC IPP C Typ.Note 9 Volts A MIN NOM MAX mA Volts Amps pF 5.0 6.0 6.5 8.0 8.5 9.0 10 11 12 13 14 15 16 17 18 20 22 24 26 28 30 33 36 40 43 45 48 51 54 58 60 70 400 400 250 25 5.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 1.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 6.40 6.67 7.22 8.89 9.44 10.00 11.10 12.20 13.30 14.40 15.60 16.70 17.80 18.90 20.00 22.20 24.40 26.70 28.90 31.10 33.30 36.70 40.00 44.40 47.80 50.00 53.30 56.70 60.00 64.40 66.70 77.80 6.70 7.02 7.60 9.36 9.92 10.55 11.70 12.85 14.00 15.15 16.40 17.60 18.75 19.90 21.05 23.35 25.65 28.10 30.40 32.75 35.05 38.65 42.10 46.75 50.30 52.65 56.10 59.70 63.15 67.80 70.20 81.90 7.00 7.37 7.98 9.83 10.40 11.10 12.30 13.50 14.70 15.90 17.20 18.50 19.70 20.90 22.10 24.50 26.90 29.50 31.90 34.40 36.80 40.60 44.20 49.10 52.80 55.30 58.90 62.70 66.30 71.50 73.72 86.00 10 10 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 9.2 10.3 11.2 13.6 14.4 15.4 17.0 18.2 19.9 21.5 23.2 24.4 26.0 27.6 29.2 32.4 35.5 38.9 42.1 45.4 48.4 53.3 58.1 64.5 69.4 72.2 77.4 82.4 87.1 93.6 96.8 113.0 43.5 38.8 35.7 29.4 27.8 26.0 23.5 22.0 20.1 18.6 17.2 16.4 15.4 14.5 13.7 12.3 11.3 10.3 9.5 8.8 8.3 7.5 6.9 6.2 5.8 5.5 5.2 4.9 4.6 4.3 4.1 3.5 2035 1730 1605 1035 1265 1200 1090 1000 925 860 800 758 715 680 645 585 540 500 460 430 405 375 345 315 295 280 265 252 240 225 219 190 Agency Approval X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Electrical Characteristics - For Bi-directional Device Device Marking SZ1SMA10CAT3G SZ1SMA12CAT3G SZ1SMA13CAT3G SZ1SMA15CAT3G SZ1SMA16CAT3G SZ1SMA18CAT3G SZ1SMA20CAT3G SZ1SMA22CAT3G SZ1SMA24CAT3G SZ1SMA26CAT3G SZ1SMA28CAT3G SZ1SMA30CAT3G SZ1SMA33CAT3G SZ1SMA36CAT3G SZ1SMA40CAT3G SZ1SMA43CAT3G SZ1SMA45CAT3G SZ1SMA48CAT3G SZ1SMA58CAT3G SZ1SMA60CAT3G SZ1SMA70CAT3G SZ1SMA78CAT3G QXC REC RGC RMC RPC RTC RVC RXC RZC SEC SGC SKC SMC SPC SRC STC SVC SXC TGC TKC TPC TTC VRWMNote 6 IR @ VRWM Volts 10 12 13 15 16 18 20 22 24 26 28 30 33 36 40 43 45 48 58 60 70 78 A 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Breakdown Voltage VBR @ IT (V)Note 7 MIN 11.10 13.30 14.40 16.70 17.80 20.00 22.20 24.4 26.70 28.90 31.10 33.30 36.70 40.00 44.40 47.80 50.00 53.30 64.40 66.70 77.80 86.70 NOM 11.69 14.00 15.16 17.58 18.74 21.06 23.37 25.65 28.11 30.42 32.74 35.06 38.63 42.11 46.74 50.30 52.65 56.11 67.79 70.21 81.90 91.27 MAX 12.27 14.70 15.92 18.46 19.67 22.11 24.54 26.90 29.51 31.94 34.37 36.81 40.56 44.21 49.07 52.80 55.30 58.91 71.18 73.72 85.99 95.83 VC @ IPP(Note 8 @ IT VC IPP mA 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Volts 17.0 19.9 21.5 24.4 26.0 29.2 32.4 35.5 38.9 42.1 45.4 48.4 53.3 58.1 64.5 69.4 72.2 77.4 93.6 96.8 113.0 126.0 Amps 23.5 20.1 18.6 16.4 15.4 13.7 12.3 11.3 10.3 9.5 8.8 8.3 7.5 6.9 6.2 5.8 5.5 5.2 4.3 4.1 3.5 3.2 Agency Approval X X X X X X X X X X X X X X X X X X 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) 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/29/20 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 MH z SZ1SMA5.0AT3G SZ1SMA10AT3G SZ1SMA36AT3G 100 SZ1SMA64AT3G 10 1 10 BIAS VOLTAGE (VOLTS) 10 100 100 Figure 6. Steady State Power Derating PD, MAXIMUM POWER DISSI PATION (WATTS) 10,000 1 BIAS VOLTAGE (VOLTS) Figure 5. Typical Junction Capacitance vs. Bias Voltage C, CAPACITANCE (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, TEMPERATURE (C) 125 150 (c) 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/29/20 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 Average ramp up rate (Liquidus Temp (TL) to peak 3C/second max TS(max) to TL - Ramp-up Rate 3C/second max Reflow - Temperature (TL) (Liquidus) 217C - Time (min to max) (tL) 60 - 150 seconds Peak Temperature (TP) 260 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 +0/-5 Critical Zone TL to TP tL Ts(max) Ramp-down Ts(min) ts Preheat 25C t 25C to Peak Time (t) Environmental Specifications Polarity 0.00246 ounce, 0.0767 grams JEDEC DO214AC. Void-Free, Transfer-Molded, Thermosetting Plastic Epoxy Meets UL 94V-0 Color band denotes cathode for unidirectional components. Terminal Matte Tin-plated leads, Solderable per JESD22-B102 Case Ramp-up TL C Physical Specifications Weight tp TP Temperature (T) Reflow Condition Soldering Footprint 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 4.000 0.157 E bD D 2.000 0.079 The cathode indicator is for uni- devices only 2.000 0.079 A SCALE 8:1 mm inches A1 c L Ordering Information Device** Package Shipping Dim SZ1SMAxxAT3G SMA (Pb-Free) 5,000 / Tape & Reel SZ1SMAxxCAT3G SMA (Pb-Free) 5,000 / Tape & Reel **The "T3" suffix refers to a 13 inch reel Inches Millimeters Min Nom Max Min Nom A 0.078 0.083 0.087 1.97 2.10 Max 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 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 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 (c) 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/29/20 TVS Diodes Surface Mount > 400W > SZ1SMA Series Part Marking System 1 Cathode Part Numbering System LFXXXX YMAWW SZ 2 Anode 1SMA xx CA T3 G 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) 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/29/20