SMAJ ® TRANSIL™ FEATURES ■ Peak Pulse Power : 400 W (10/1000µs) ■ Stand off voltage range: From 5V to 188V ■ Uni and Bidirectional types ■ Low clamping factor ■ Fast response time ■ JEDEC registered package outline A K Unidirectional DESCRIPTION The SMAJ series are TRANSILTM diodes designed specifically for protecting sensitive equipment against transient overvoltages. The SMA package allows save spacing on high density printed circuit boards. Transil diodes provide high overvoltage protection by clamping action. Their instantaneous response to transient overvoltages makes them particularly suited to protect voltage sensitive devices such as MOS Technology and low voltage supplied IC’s. Bidirectional SMA (JEDEC DO-214AC) Table 1: Order Codes Part Number Marking SMAJxxxA-TR See page 2 SMAJxxxCA-TR See page 2 Table 2: Absolute Maximum Rating (Tamb = 25°C) Symbol PPP Parameter Value Unit Peak pulse power dissipation (see note 1) Tj initial = Tamb 400 W Power dissipation on infinite heatsink Tamb = 50°C 3.3 W IFSM Non repetitive surge peak forward current for unidirectional types tp = 10 ms Tj initial = Tamb 40 A Tstg Tj Storage temperature range Maximum junction temperature -65 to 175 150 °C 260 °C Value 30 120 Unit °C/W °C/W P TL Maximum lead temperature for soldering during 10 s. Note 1: for a surge greater than the maximum values, the diode will fail in short-circuit. Table 3: Thermal Resistances Symbol Parameter Rth(j-l) Junction to leads Rth(j-a) Junction to ambient on printed circuit on recommended pad layout February 2006 REV. 8 1/6 SMAJ Table 4: Electrical Characteristics (Tamb = 25°C) Symbol Parameter VRM Stand-off voltage VBR Breakdown voltage VCL Clamping voltage I I IF IPP VF VCL VBR VRM IRM Leakage current IPP Peak pulse current αT Voltage temperature coefficient VF Forward voltage drop V IR IRM VCLVBR VRM IRM IR IPP Unidirectional IRM @ VRM VBR @ IR Types max min note2 IPP VCL @ IPP VCL @ IPP max max 10/1000µs 8/20µs Unidirectional Mark. Bidirectional Mark. µA V V mA V A V SMAJ5.0A-TR SMAJ6.0A-TR SMAJ6.5A-TR SMAJ8.5A-TR SMAJ10A-TR SMAJ12A-TR SMAJ13A-TR SMAJ15A-TR SMAJ18A-TR SMAJ20A-TR SMAJ22A-TR SMAJ24A-TR SMAJ26A-TR SMAJ28A-TR SMAJ30A-TR SMAJ33A-TR SMAJ40A-TR SMAJ43A-TR SMAJ48A-TR SMAJ58A-TR SMAJ70A-TR SMAJ85A-TR SMAJ100A-TR SMAJ130A-TR SMAJ154A-TR SMAJ170A-TR SMAJ188A-TR AE DUB DUC DUH AX DUK BG BM DUQ DUR DUS DUT DUU CG CK CM DUZ EUA CX EUF EUI EUL EUN EUQ EUT SR EUV SMAJ5.0CA-TR SMAJ6.0CA-TR SMAJ6.5CA-TR SMAJ8.5CA-TR SMAJ10CA-TR SMAJ12CA-TR SMAJ13CA-TR SMAJ15CA-TR SMAJ18CA-TR SMAJ20CA-TR SMAJ22CA-TR SMAJ24CA-TR SMAJ26CA-TR SMAJ28CA-TR SMAJ30CA-TR SMAJ33CA-TR SMAJ40CA-TR SMAJ43CA-TR SMAJ48CA-TR SMAJ58CA-TR SMAJ70CA-TR SMAJ85CA-TR SMAJ100CA-TR SMAJ130CA-TR SMAJ154CA-TR SMAJ170CA-TR SMAJ188CA-TR AA DBB DBC DBH AC DBK BH AJ DBQ DBR DBS DBT DBU CH CL CN DBZ EBA CY EBF EBI EBL EBN EBQ EBT SS EBV 800 800 500 10 5 5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5.0 6.0 6.5 8.5 10 12 13 15 18 20 22 24 26 28 30 33 40 43 48 58 70 85 100 130 154 170 188 6.4 6.7 7.2 9.44 11.1 13.3 14.4 16.7 20 22.2 24.4 26.7 28.9 31.1 33.3 36.7 44.4 47.8 53.3 64.4 77.8 94.4 111 144 171 189 209 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 9.2 10.3 11.2 14.4 17 19.9 21.5 24.4 29.2 32.4 35.5 38.9 42.1 45.4 48.4 53.3 64.5 69.4 77.4 93.6 113 137 162 209 246 275 328 43.5 38.8 35.7 27.7 23.5 20.1 18.6 16.4 13.7 12.3 11.2 10.3 9.5 8.8 8.3 7.5 6.2 5.7 5.2 4.3 3.5 2.9 2.5 1.9 1.6 1.4 1.4 13.4 13.7 14.5 18.6 21.7 25.3 27.2 32.5 39.3 42.8 48.3 50 53.5 59 64.3 69.7 84 91 100 121 146 178 212 265 317 353 388 Note 2: Note 3: Note 4: 2/6 V IRM IR Pulse test : tp < 50 ms. ∆VBR = αT * (Tamb - 25) * VBR(25°C). VR = 0 V, F = 1 MHz. For bidirectional types, capacitance value is divided by 2. VRMVBR VCL Bidirectional αT C max note3 typ note4 10-4/°C 174 5.7 170 5.9 160 6.1 124 7.3 106 7.8 91 8.3 85 8.4 71 8.8 59 9.2 54 9.4 48 9.6 46 9.6 43 9.7 39 9.8 36 9.9 33 10.0 27 10.1 25 10.2 23 10.3 19 10.4 16 10.5 13 10.6 11 10.7 9 10.8 7 10.8 6.5 10.8 6 10.8 A pF 3500 3300 3100 2000 1550 1325 1200 975 800 725 625 600 575 510 480 450 370 350 320 270 230 200 170 145 125 120 110 SMAJ Figure 1: Pulse waveform (10/1000µs) Figure 2: Peak power dissipation versus initial junction temperature 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 Figure 3: Peak pulse power versus exponential pulse duration (Tj initial=25°C) Ppp(W) Ppp[Tj initial]/Ppp[Tj initial=25°C] Tj initial(°C) 0 25 75 100 125 150 175 Figure 4: Clamping voltage versus peak pulse current (Tj initial=25°C) Exponential waveform tp=20ms & tp=1ms 200.0 100.0 5000 50 Ipp(A) tp = 20 µs tp = 1 ms SMAJ13A,CA SMAJ5.0A,CA SMAJ26A,CA SMAJ58A,CA tp=1ms 10.0 1000 SMAJ188A,CA 1.0 tp(ms) 100 0.01 0.10 VCL(V) 1.00 10.00 Figure 5: Capacitance versus reverse applied voltage (typical values) (SMAJxxA) 5000 C(pF) 0.1 1 10 100 500 Figure 6: Capacitance versus reverse applied voltage (typical values) (SMAJxxCA) 2000 1000 C(pF) SMAJ5.0CA F=1MHz F=1MHz SMAJ5.0A 1000 SMAJ13CA SMAJ13A SMAJ26CA 100 SMAJ26A SMAJ58CA SMAJ58A 100 SMAJ188CA SMAJ188A 10 VR(V) 10 1 10 VR(V) 100 200 1 1 10 100 200 3/6 SMAJ Figure 7: Peak forward voltage drop versus peak forward current (typical values) 10.00 1.00 IFM(A) Figure 8: Relative variation of thermal impedance junction to ambient versus pulse duration 1.00 Zth(j-a)/Rth(j-a) Tj=125°C 0.10 Tj=25°C 0.10 VFM(V) 0.01 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 Figure 9: Thermal resistance junction to ambient versus copper surface under each lead (printed circuit board FR4 e(Cu)=35µm) 140 130 120 110 100 90 80 70 60 50 40 0.01 1E-2 tp(s) 1E-1 1E+0 1E+1 1E+2 5E+2 Figure 10: Relative variation of leakage current versus junction temperature IR[Tj] / IR [Tj=25°C] Rth(j-a) (°C/W) 2E+3 1E+3 VBR ≥ 8.5V 1E+2 1E+1 VBR < 8.5V 1E+0 Tj(°C) S(Cu)(cm²) 0 1 2 3 4 5 1E-1 0 25 50 75 100 Figure 11: Ordering Information Scheme SM Surface Mount Peak Pulse Power A = 400 W Stand off voltage 85 = 85 V Type A = Unidirectinal CA = Bidirectional Packaging TR = Tape & reel 4/6 A J 85 CA - TR 125 150 SMAJ Figure 12: SMA Package Mechanical Data REF. E1 DIMENSIONS Millimeters D E A1 A2 C L b Figure 13: Foot print dimensions (millimeters) Inches Min. Max. Min. Max. A1 1.90 2.03 0.075 0.080 A2 0.05 0.20 0.002 0.008 b 1.25 1.65 0.049 0.065 c 0.15 0.41 0.006 0.016 E 4.80 5.60 0.189 0.220 E1 3.95 4.60 0.156 0.181 D 2.25 2.95 0.089 0.116 L 0.75 1.60 0.030 0.063 Figure 14: Marking Cathode bar ( unidirectional devices only ) 1.73 1.48 1.73 e3 1.67 x x x z y ww 4.94 E : ECOPACK ( Leadfree ) mention XXX : Marking Z : Manufacturing location Y : Year WW : week In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Table 5: Ordering Information Part Number Marking Package Weight Base qty Delivery mode SMAJxxxA-TR See page 2 SMA 0.068 g 5000 Tape & reel SMAJxxxCA-TR See page 2 SMA 0.068 g 5000 Tape & reel Table 6: Revision History Date Revision Description of Changes September-1998 5B 02-Aug-2004 6 SMA package dimensions update. Reference A1 max. changed from 2.70mm (0.106inc.) to 2.03mm (0.080). 10-Dec-2004 7 Template layout update. No content change. 10-Feb-2006 8 Added unidirectional marking on cover page and Figure 14. Changed Figure 13. Foot print. Previous update. 5/6 SMAJ Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2006 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 6/6