1N4278

R SEMICONDUCTOR 1W SILICON PLANAR ZENER DIODES DO-41(GLASS) FEATURES Silicon planar power zener diodes Fo r use in stabilizing and cl ipping c ircu its wi th h igh po wer rating. Standards Zener voltage tol eranc e is 10% . A dd s uff ix "A " fo r reques t 5% to lerance Oth er to leranc e av ailable upo n 0.102(2.6) MAX DIA 1.102(28) MIN 0.161(4.1) MAX MECHANICAL DATA Case: DO-41 glass case Weig ht: A pprox . 0.35 gram 0.034(0.86) MAX DIA 1.102(28) MIN D imensio ns in inc h es and (mil limeters) ABSOLUTE MAXIMUM RATINGS(LIMITING VALUES) (TA=25 C) Zene r cur rent see table " C haracte ristics" Pow er dissi pation at TA= 2 5 C Jun ction te mpe rature Storage tem perature rang e Ptot TJ TSTG 11) 17 5 -6 5 to+ 17 5 mW C C 1) Val id pro vide d that a di stan ce of 8m m fr om case are kept at amb ient te mpe rature ELECTRICAL CHARACTERISTICS (TA=25 C) T herm al r esista nce junc tion to amb ient a ir For w ard voltage at IF=2 00m A RthA VF 17 01) 1.2 C /W V 1) Val id pro vide d that a di stan ce of 8 mm fro m c ase are kept at am bi ent tem pera tu re No m in a l Ze ne r 3) Vo ltag e Te st C urren t 1) Surg e c urren t Ma ximu m reg ula to r C urren t 2) 1N4728 1N4729 1N4730 1N4731 1N4732 1N4733 1N4734 1N4735 1N4736 1N4737 1N4738 1N4739 1N4740 1N4741 1N4742 1N4743 1N4744 1N4745 1N4746 1N4747 1N4748 1N4749 1N4750 1N4751 1N4752 1N4753 1N4754 1N4755 1N4756 1N4757 1N4758 1N4759 1N4760 1N4761 1N4762 1N4763 1N4764 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91 100 76 69 64 58 53 49 45 41 37 34 31 28 25 23 21 19 17 15.5 14 12.5 11.5 10.5 9.5 8.5 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.7 3.3 3.0 2.8 2.5 10 10 9 9 8 7 5 2 3.5 4.0 4.5 5.0 7 8 9 10 14 16 20 22 23 25 35 40 45 50 60 70 80 95 110 125 150 175 200 250 350 3000 1500 1000 0.25 750 700 0.5 500 550 600 1.0 400 100 50 1.0 1.0 1.0 1.0 1.0 1.0 2.0 1380 1260 1190 1070 970 890 810 730 660 605 550 500 454 414 380 344 304 285 250 225 205 190 170 150 135 125 115 110 95 90 80 70 65 60 55 50 45 276 252 234 217 193 178 162 146 133 121 110 100 91 83 76 69 61 57 50 45 41 38 34 30 27 25 23 22 19 18 16 14 13 12 11 10 9 10 3.0 4.0 5.0 6.0 7.0 7.6 8.4 9.1 9.9 11.4 12.2 13.7 15.2 16.7 18.2 20.6 5 22.8 25.1 27.4 29.7 32.7 35.8 38.8 42.6 47.1 51.7 56.0 62.2 69.2 76.0 Notes: 1) The Zener im pedance is derived from the 1KHz AC voltage which results when an AC current having an RM S value equal to 10% of the Zener current (IZT or IZK) is superi mposed on IZT or IZK. Zener im pedance is measured at tw o points to insure a sharp knee on the breakdown curve and to eliminate unstable units. 2) Valid provided that electrodes at a distance of 10mm from case are kept at ambient temperature 3) M easured under thermal equil ibri um and DC test conditi ons. Admissible power dissipation versus ambient temperature (Valid provided that leads at a distance of 10mm from case are kept at ambient temperature) W 1.0 1N4728...1N4764 Ptot 0.8 0.6 0.4 0.2 0 0 100 Tam b 200 C