SM15T TRANSIL™ Features ■ Peak pulse power: 1500 W (10/1000 µs) ■ Breakdown voltage range: from 6.8 V to 220 V ■ Uni and bidirectional types ■ Low clamping factor ■ Fast response time ■ UL recognized A K Unidirectional Bidirectional SMC (JEDEC DO-214AB) Description 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. Table 1. Order code Part number Marking SM15TxxxA See Table 5 on page 7 SM15TxxxCA See Table 5 on page 7 Absolute maximum ratings (Tamb = 25° C) Symbol Value Unit Tj initial = Tamb 1500 W Power dissipation on infinite heatsink Tamb = 50° C 6.5 W IFSM Non repetitive surge peak forward current for unidirectional types tp = 10ms Tj initial = Tamb 200 A Tstg Storage temperature range -65 to + 175 °C PPP P Parameter Peak pulse power dissipation(1) Tj Maximum operating junction temperature 150 °C TL Maximum lead temperature for soldering during 10 s. 260 °C Value Unit 1. For a surge greater than the maximum values, the diode will fail in short-circuit. Table 2. Thermal parameter Symbol Parameter Rth(j-l) Junction to leads 15 °C/W Rth(j-a) Junction to ambient on printed circuit on recommended pad layout 75 °C/W TM: TRANSIL is a trademark of STMicroelectronics February 2007 Rev 4 1/9 www.st.com 9 Characteristics SM15T 1 Characteristics Table 3. Electrical characteristics Symbol Parameter VBR Breakdown voltage IRM Leakage current @ VRM VRM Stand-off voltage Unidirectional I I IF IPP VF VCL VBR VRM VCL Clamping voltage Rd Dynamic impedance αT Voltage temperature coefficient IPP Peak pulse current VBR @ IR(1) IRM @ VRM Type SM15T6V8A/CA SM15T7V5A/CA SM15T10A/CA SM15T12A/CA SM15T15A/CA SM15T18A/CA SM15T22A/CA SM15T24A/CA SM15T27A/CA SM15T30A/CA SM15T33A/CA SM15T36A/CA SM15T39A/CA SM15T68A/CA SM15T75A/CA SM15T100A/CA SM15T150A/CA SM15T200A/CA SM15T220A/CA V VCLVBR VRM IR IRM V IRM IR IRM IR IPP IPP VCL @ IPP VCL @ IPP 10/1000 µs 8/20 µs max µA 1000 500 10 5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 V 5.8 6.4 8.55 10.2 12.8 15.3 18.8 20.5 23.1 25.6 28.2 30.8 33.3 58.1 64.1 85.5 128 171 188 min nom max V 6.45 7.13 9.5 11.4 14.3 17.1 20.9 22.8 25.7 28.5 31.4 34.2 37.1 64.6 71.3 95.0 143 190 209 V 6.8 7.5 10 12 15 18 22 24 27 30 33 36 39 68 --100 150 200 220 V 7.14 7.88 10.5 12.6 15.8 18.9 23.1 25.2 28.4 31.5 34.7 37.8 41.0 71.4 78.8 105 158 210 231 max mA 10 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bidirectional αT C max(2) typ(3) 10-4/°C 5.7 6.1 7.3 7.8 8.4 8.8 9.2 9.4 9.6 9.7 9.8 9.9 10.0 10.4 10.5 10.6 10.8 10.8 10.8 pF 9500 8500 7000 6000 5000 4300 3700 3500 3200 2900 2700 2500 2400 1550 1450 1150 850 675 625 max V 10.5 11.3 14.5 16.7 21.2 25.2 30.6 33.2 37.5 41.5 45.7 49.9 53.9 92 103 137 207 274 328 A 143 132 103 90 71 59.5 49 45 40 36 33 30 28 16.3 14.6 11 7.2 5.5 4.6 1. Pulse test: tp < 50 ms. 2. ΔVBR = αT * (Tamb - 25) * VBR (25°C) VRMVBR VCL V 13.4 14.5 18.6 21.7 27.2 32.5 39.3 42.8 48.3 53.5 59.0 64.3 69.7 121 134 178 265 353 388 A 746 690 538 461 368 308 254 234 207 187 169 156 143 83 75 56 38 28 26 %IPP 100 10 µs 3. VR = 0 V, F = 1 MHz. For bidirectional types capacitance value is divided by 2. Pulse waveform 10/1000µs 50 0 t 1000 µs 2/9 SM15T Characteristics Figure 1. Peak pulse power dissipation versus initial junction temperature (printed circuit board) Figure 2. % Peak pulse power versus exponential pulse duration PPP (kW) 100.0 100 80 10.0 60 40 1.0 20 tp (ms) ø Tj initial (°C) 0.1 0 0 Figure 3. 20 40 60 80 100 120 140 160 180 1.E-03 200 1.E-02 1.E-01 1.E+00 1.E+01 Clamping voltage versus peak pulse current Exponential waveform tp = 20 ms tp = 1 ms—————— tp = 10 ms............... VCL (V) 1000 %IPP Tj initial = 25°C 100 50 SM15T 220A 0 tr SM15T 150A 100 tp tr < 10 µS t SM15T 68A SM15T 39A SM15T 22A SM15T 10A 10 SM15T 6V8A IPP (A) 1 0.1 Note: 1 10 100 1000 The curves of figure 3 are specified for a junction temperature of 25° C before surge. The given results may be extrapolated for other junction temperatures by using the following formula: ΔVBR = αT * [Tamb -25] * VBR (25° C) For intermediate voltages, extrapolate the given results. 3/9 Characteristics Figure 4. SM15T Capacitance versus reverse applied Figure 5. voltage for unidirectional types (typical values) C (pF) Capacitance versus reverse applied voltage for bidirectional types (typical values) C (pF) 10000 10000 SM15T 6V8A Tj = 25°C F = 1 MHz Tj = 25°C F = 1 MHz SM15T 6V8CA SM15T 15A SM15T 15CA SM15T 30A 1000 SM15T 30CA 1000 SM15T 68A SM15T 68CA SM15T 200A SM15T 200CA 100 100 VR (V) VR (V) 10 1 Figure 6. 10 10 500 100 1 Peak forward voltage drop versus Figure 7. peak forward current (typical values for unidirectional types) 10 100 500 Transient thermal impedance junction-ambient versus pulse duration - mounting on FR4 PC board with recommended pad layout Zth(j-a) (°C/W) IFM (A) 100 500 10 100 Tj initial = 25°C Tj initial = 175°C 1 10 tp (s) VFM (V) 0.1 1 0 Figure 8. 5E+3 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Relative variation of leakage current versus junction temperature IR (Tj) IR (Tj = 25°C) 1E+3 VR = VRM 1E+2 1E+1 1E+0 Tj (°C) 1E-1 0 4/9 25 50 75 100 125 150 0.01 0.1 1 10 100 1000 SM15T 2 Ordering information scheme Ordering information scheme SM 15 T xx CA Surface Mount Surge rating 15 = 1500 W Breakdown voltage 100 = 100 V Type A = Unidirectional CA = Bidirectional 5/9 Package mechanical data 3 SM15T Package mechanical data ● Case: JEDEC DO-214AB molded plastic over Planar junction ● Terminals: Solder plated, solderable per MIL-STD-750, Method 2026 ● Polarity: For unidirectional types the band indicates cathode ● Flammability: Epoxy is rated UL94V-0 ● RoHS package Table 4. SMC dimensions Dimensions Ref. E1 Millimeters Inches Min. Max. Min. Max. A1 1.90 2.45 0.075 0.096 A2 0.05 0.20 0.002 0.008 b 2.90 3.2 0.114 0.126 c 0.15 0.41 0.006 0.016 E 7.75 8.15 0.305 0.321 E1 6.60 7.15 0.260 0.281 E2 4.40 4.70 0.173 0.185 D 5.55 6.25 0.218 0.246 L 0.75 1.60 0.030 0.063 D E A1 A2 C E2 Figure 9. 2.20 L b Footprint dimensions (millimeter) 4.25 Figure 10. Marking layout 2.20 Cathode bar (unidirectional devices only ) e3 3.30 8.65 6/9 x x x z y ww e3: ECOPACK ( Leadfree) XXX: Marking Z: Manufacturing location Y: Year WW: week SM15T Package mechanical data Table 5. Marking Unidirectional Marking Bidirectional Marking SM15T6V8A MDE SM15T6V8CA BDE SM15T7V5A MDG SM15T7V5CA BDG SM15T10A MDP SM15T10CA BDP SM15T12A MDT SM15T12CA BDT SM15T15A MDX SM15T15CA BDX SM15T18A MEE SM15T18CA BEE SM15T22A MEK SM15T22CA BEK SM15T24A MEM SM15T24CA BEM SM15T27A MEP SM15T27CA BEP SM15T30A MER SM15T30CA BER SM15T33A MET SM15T33CA BET SM15T36A MEV SM15T36CA BEV SM15T39A MEX SM15T39CA BEX SM15T68A MFP SM15T68CA BFP SM15T75A MFO SM15T75CA BFO SM15T100A MFX SM15T100CA BFX SM15T150A MGK SM15T150CA BGK SM15T200A MGV SM15T200CA BGV SM15T220A MGX SM15T220CA BGX 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. 7/9 Ordering information 4 Ordering information Part number 5 8/9 SM15T Marking SM15TxxxA See Table 5 on page 7 SM15TxxCA See Table 5 on page 7 Package Weight Base qty Delivery mode SMC 0.25 g 5000 Tape and reel Revision history Date Revision September-2001 3B 19-Feb-2007 4 Description of Changes Last issue Reformatted to current standards. Peak pulse power Figure 2 on page 3 updated. SM15T Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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