SM8A27T www.vishay.com vishay general semiconductor revision: 24-mar-15 1 document number: 87915 for technical questions within your region: diodesamericas@vishay.com , diodesasia@vishay.com , diodeseurope@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 surface mount par ? transient voltage suppressors high temperature stability and high reliability conditions features ? junction passivation optimized design passivated anisotropic rectifier technology ?t j = 175 c capability suitable for high reliability and automo tive requirement ? low leakage current ? low forward voltage drop ? high surge capability ? meets iso7637-2 surge specification ? meets msl level 1, per j-std-020, lf maximum peak of 245 c ? aec-q101 qualified ? material categorization: fo r definitions of compliance please see www.vishay.com/doc?99912 typical applications use in sensitive electronics protection against voltage transients induced by inductive load switching and lighting, especially for automotive load dump protection application. mechanical data case: do-218ac ? molding compound meets ul 94 v-0 flammability rating base p/nhe3 - rohs-compliant, aec-q101 qualified terminals: matte tin plated leads, solderable per j-std-002 and jesd 22-b102 ? he3 suffix meets jesd 201 class 2 whisker test polarity: heatsink is anode primary characteristics v br 27 v p ppm (10 x 1000 s) 6600 w p d 8 w v wm 22 v i rsm 130 a i fsm 700 a t j max. 175 c polarity uni-directional package do-218ac do-218 compatible maximum ratings (t c = 25 c unless otherwise noted) parameter symbol value unit peak pulse power dissipatio n with 10/1000 s waveform p ppm 6600 w power dissipation on in finite heatsink at t c = 25 c (fig. 1) p d 8.0 w non-repetitive peak reverse surge cu rrent for 10 s/10 ms exponentially decaying waveform i rsm 130 a maximum working stand-off voltage v wm 22.0 v peak forward surge current 8. 3 ms single ha lf sine-wave i fsm 700 a operating junction and storage temperature range t j , t stg -55 to +175 c electrical characteristics (t a = 25 c unless otherwise noted) device type breakdown voltage v br at i t (v) test current i t (ma) stand-off voltage v wm (v) min. max. SM8A27T 24 30 10 22
SM8A27T www.vishay.com vishay general semiconductor revision: 24-mar-15 2 document number: 87915 for technical questions within your region: diodesamericas@vishay.com , diodesasia@vishay.com , diodeseurope@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 note (1) measured on a 300 s square pulse width note (1) aec-q101 qualified ratings and characteristics curves (t a = 25 c unless otherwise noted) fig. 1 - power derating curve fig. 2 - load dump power characteristics (10 ms exponential waveform) additional characteristics (t c = 25 c unless otherwise noted) parameter test conditions symbol min. typ. max. unit zener voltage temperature coefficient i z = 10 ma v ztc --36mv/c clamping voltage for 10 s/10 ms exponentially decaying waveform i pp = 75 a v c - - 40.0 v instantaneous forward voltage i f = 6.0 a v f (1) - - 0.98 v i f = 100 a - 0.93 - reverse leakage current rated v wm t j = 25 c i r --1.0 a t j = 175 c - - 50.0 thermal characteristics (t c = 25 c unless otherwise noted) parameter symbol value unit typical thermal resistance, junction to case r ? jc 0.90 c/w ordering information (example) preferred p/n unit weight (g) preferred package code base quantity delivery mode SM8A27The3/i (1) 2.605 i 750 13" diameter plastic tape and reel, anode towards the sprocket hole 0 2.0 4.0 6.0 8.0 0 50 100 150 200 power di ss ipation (w) ca s e temperature (c) 0 2000 1000 3000 4000 5000 6000 25 50 75 100 125 150 175 load dump power (w) ca s e temperature (c)
SM8A27T www.vishay.com vishay general semiconductor revision: 24-mar-15 3 document number: 87915 for technical questions within your region: diodesamericas@vishay.com , diodesasia@vishay.com , diodeseurope@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 fig. 3 - pulse waveform fig. 4 - reverse power capability fig. 5 - typical instantaneous forward characteristics fig. 6 - typical reverse characteristics fig. 7 - typical transient thermal impedance ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 50 100 150 0 10 20 30 40 input peak pul s e current (%) t - time (m s ) t d t r = 10 s peak value i ppm half value - i ppm i pp 2 t j = 25 c pul s e width (t d ) i s defined a s the point where the peak current decay s to 50 % of i ppm rever s e s urge power (w) 1000 10 000 10 100 pul s e width (m s ) - ? i pp exponential waveform in s tantaneou s forward current (a) 100 10 1.0 0.1 0.01 in s tantaneou s forward voltage (v) 0.35 0.45 0.55 0.65 0.75 0.85 0.95 t j = 150 c t j = 25 c 100 10 5203550658095 1 0.1 0.01 0.001 0.0001 percentage of v br (%) in s tantaneou s rever s e current (a) t j = 25 c t j = 175 c t - pul s e width ( s ) tran s ient thermal impedance (c/w) 100 10 1 0.1 0.01 0.01 0.1 1 10 100 r jc r ja
SM8A27T www.vishay.com vishay general semiconductor revision: 24-mar-15 4 document number: 87915 for technical questions within your region: diodesamericas@vishay.com , diodesasia@vishay.com , diodeseurope@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 package outline dimensions in inches (millimeters) 0.116 (3.0) 0.093 (2.4) 0.628 (16.0) 0.592 (15.0) 0.539 (13.7) 0.524 (13.3) 0.366 (9.3) 0.343 (8.7) 0.406 (10.3) 0.382 (9.7) 0.342 (8.7) 0.327 (8.3) 0.413 (10.5) 0.374 (9.5) 0.028 (0.7) 0.020 (0.5) 0.138 (3.5) 0.098 (2.5) lead 1 0.098 (2.5) 0.059 (1.5) lead 2/metal heat s ink 0.197 (5.0) 0.185 (4.7) mountin g pad layout 0.413 (10.5) 0.374 (9.5) 0.091 (2.3) 0.067 (1.7) 0.116 (3.0) 0.093 (2.4) 0.150 (3.8) 0.126 (3.2) 0.366 (9.3) 0.343 (8.7) 0.606 (15.4) 0.583 (14.8) do-218ac 0.004 (0.10) (nom.)
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