metallurgically bonded glass surface mount 1.0 w zeners www. microsemi . com scottsdale division 1n4728ur-1 thru 1n4764aur-1,e3 (or mll4728a-1 thru mll4764a-1,e3) 1n4728aur-1 thru 1n4764aur-1 description appearance this surface mountable 1 watt zener diode series is electrically equivalent to the 1n4728a thru 1n4764a registration in the do-41 equivalent package except that it meets the jedec su rface mount outline do-213ab and also includes enhanced internal contact design. it is an ideal selection for applications of high density and low parasitic requirements for voltage regulation. standard voltage tolerance is +/-5% with tighter tolerances available down to 1%. with its gla ss hermetic qualities, it may also be used for high reliability applications when required by a source control drawing (scd). do-213ab important: for the most current data, consult microsemi?s website: http://www.microsemi.com features applications / benefits ? electrically similar to the jedec registered 1n4728 thru 1n4764 zener series ? regulates voltage over a broad operating current and temperature range ? zener voltages available 3.3v to 100v ? metallurgically enhanced internal contact design fro greater reliability and lower thermal resistance ? standard voltage tolerances are +/- 5% with ?a? suffix and 10 % with no suffix identification ? wide selection from 3.3 to 100 v ? tight tolerances available in plus or minus 2% or 1% with c or d suffix respectively ? leadless package for surface mounting ? ideal for high density mounting ? options for screening in accordance with mil-prf- 19500 for jan, jantx, jantxv, and jans are available by adding mq, mx, mv, or msp prefixes respectively to part numbers. ? nonsensitive to esd ? hermetically sealed glass package ? specified capacitance (see figure 2) ? inherently radiation hard per micronote 050 ? surface mount equivalents also available as smaj4728a to smaj4764a and smaj4728a to smaj4764a ? rohs compliant devices available by adding ?e3? suffix ? plastic body axial-leaded zener equivalents are also available as 1n4728a to 1n4764a maximum ratings mechanical and packaging microsemi scottsdale division page 1 copyright ? 2005 10-18-2005 rev a , e3 ? power dissipation at 25 o ? case: hermetically sealed do-213ab glass melf c: 1.0 watts (also see derating in figure 1). ? terminals: tin-lead (sn/pb) or rohs compliant annealed matte-tin plating solderable per mil-std- 750, method 2026 ? operating and storage temperature: -65 o c to +175 o c ? thermal resistance: 40 o c/w junction to end cap, or 120 o ? polarity: cathode indicated by band. diode to be operated with the banded end positive with respect to the opposite end for zener regulation c/w junction to ambient when mounted on fr4 pc board (1 oz cu) with recommended footprint (see last page) o ? marking: cathode band only ? steady-state power: 1.00 watts at t ec < 135 c, or 1.00 watts at t a < 55 o c when mounted on fr4 pc board and recommended footprint as described for thermal resistance (also see figure 1) ? tape & reel optional: standard per eia-481-b with 12 mm tape, 1500 per 7 inch reel or 5000 per 13 inch reel (add ?tr? suffix to part number) ? forward voltage @200 ma: 1.2 volts (maximum) ? weight: 0.05 grams ? solder temperatures: 260 o c for 10 s (max) ? see package dimensions & recommended mounting pad on last page 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
metallurgically bonded glass surface mount 1.0 w zeners microsemi scottsdale division page 2 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503 copyright ? 2005 10-18-2005 rev a www. microsemi . com scottsdale division 1n4728ur-1 thru 1n4764aur-1,e3 (or mll4728a-1 thru mll4764a-1,e3) 1n4728aur-1 thru 1n4764aur-1 , e3 electrical characteristics @ t c = 30 o c zener voltage (note 4) v z test current i zt maximum dynamic impedance (note 2) z zt @ i zt maximum reverse current i r @ v r test voltage v r maximum regulator current t a = 50 o c i zm maximum knee impedance (note2) z zk @ i zk test current i zk maximum (surge) current (note 3) i s type number (note 1 & 5) volts ma ohms a volts ma ohms ma ma 1n4728aur-1 1n4729aur-1 1n4730aur-1 1n4731aur-1 3.3 3.6 3.9 4.3 76 69 64 58 10 10 9 9 100 100 50 10 1 1 1 1 276 252 234 217 400 400 400 400 1.0 1.0 1.0 1.0 1380 1260 1190 1070 1n4732aur-1 1n4733aur-1 1n4734aur-1 1n4735aur-1 4.7 5.1 5.6 6.2 53 49 45 41 8 7 5 2 10 10 10 10 1 1 2 3 193 178 162 146 500 550 600 700 1.0 1.0 1.0 1.0 970 890 810 730 1n4736aur-1 1n4737aur-1 1n4738aur-1 1n4739aur-1 6.8 7.5 8.2 9.1 37 34 31 28 3.5 4.0 4.5 5.0 10 10 10 10 4 5 6 7 133 121 110 100 700 700 700 700 1.0 0.5 0.5 0.5 660 605 550 500 1n4740aur-1 1n4741aur-1 1n4742aur-1 1n4743aur-1 10 11 12 13 25 23 21 19 7 8 9 10 10 5 5 5 7.6 8.4 9.1 9.9 91 83 76 69 700 700 700 700 0.25 0.25 0.25 0.25 454 414 380 344 1n4744aur-1 1n4745aur-1 1n4746aur-1 1n4747aur-1 15 16 18 20 17 15.5 14 12.5 14 16 20 22 5 5 5 5 11.4 12.2 13.7 15.2 61 57 50 45 700 700 750 750 0.25 0.25 0.25 0.25 304 285 250 225 1n4748aur-1 1n4749aur-1 1n4750aur-1 1n4751aur-1 22 24 27 30 11.5 10.5 9.5 8.5 23 25 35 40 5 5 5 5 16.7 18.2 20.6 22.8 41 38 34 30 750 750 750 1000 0.25 0.25 0.25 0.25 205 190 170 150 1n4752aur-1 1n4753aur-1 1n4754aur-1 1n4755aur-1 33 36 39 43 7.5 7.0 6.5 6.0 45 50 60 70 5 5 5 5 25.1 27.4 29.7 32.7 27 25 23 22 1000 1000 1000 1500 0.25 0.25 0.25 0.25 135 125 115 110 1n4756aur-1 1n4757aur-1 1n4758aur-1 1n4759aur-1 47 51 56 62 5.5 5.0 4.5 4.0 80 95 110 125 5 5 5 5 35.8 38.8 42.6 47.1 19 18 16 14 1500 1500 2000 2000 0.25 0.25 0.25 0.25 95 90 80 70 1n4760aur-1 1n4761aur-1 1n4762aur-1 1n4763aur-1 68 75 82 91 3.7 3.3 3.0 2.8 150 175 200 250 5 5 5 5 51.7 56.0 62.2 69.2 13 12 11 10 2000 2000 3000 3000 0.25 0.25 0.25 0.25 65 60 55 50 1n4764aur-1 100 2.5 350 5 76.0 9 3000 0.25 45 note 1: the type numbers shown with an ?a? suffix have a +/-5% toleranc e on the nominal zener voltage. it is also available with suff ix ?c? for +/-2%, and ?d? for +/-1%. the absence of a suffix letter denotes +/- 10% tolerance. note 2: the zener impedance is derived from the 60hz ac voltage, which results when an ac current having an rms value equal to 10% of the dc zener current (i zt or i zk ) is superimposed on i zt or i zk . zener impedance is measured at two points to ensure a sharp knee on the breakdown curve and eliminate unstable units. note 3: the reverse surge current is measured at 25 o c ambient using a ? square wave or e quivalent sine wave pulse 1/120 second duration superimposed on i zt . note 4: voltage measurements to be performed 90 seconds after application of dc current. note 5: this product series has also been previ ously identified as the mll4728a-1 thru mll47 64a-1 series. this alternate name may still be used.
metallurgically bonded glass surface mount 1.0 w zeners www. microsemi . com scottsdale division 1n4728ur-1 thru 1n4764aur-1,e3 (or mll4728a-1 thru mll4764a-1,e3) 1n4728aur-1 thru 1n4764aur-1 graphs steady-state power derating power dissipation (watts) t ec t a d p temperature ( o c ) figure 2 figure 1 power derating curve where t is end cap temp ec and t a is ambient temperature on fr4 pc board. package dimensions microsemi scottsdale division page 3 copyright ? 2005 10-18-2005 rev a , e3 inches millimeters inches mm pad layout dim min max min max a .276 7.00 a 0. 094 0.105 2.39 2.66 b 0.070 1.8 b 0. 189 0.205 4.80 5.20 c 0.110 2.8 c 0.016 0.022 0.41 0.55 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
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