vishay zm4728a to zm4764a document number 85786 rev. 1.3, 19-mar-04 vishay semiconductors www.vishay.com 1 18315 zener diodes features ? silicon planar power zener diodes. for use in stablilizing and clipping circuits with high power rating. standard zener voltage tolerance is 5 %. these diodes are also available in the do-41 case with type designation 1n4728 a... 1n4764a mechanical data case: melf glass case weight: approx. 250 mg packaging codes/options: gs18 / 10 k per 13" reel (8 mm tape), 10 k/box gs08 / 3 k per 13" reel (8 mm tape), 15 k/box absolute maximum ratings t amb = 25 c, unless otherwise specified 1) valid provided that electrodes are kept at ambient temperature. thermal characteristics t amb = 25 c, unless otherwise specified 1) valid provided that electrodes are kept at ambient temperature. parameter test condition symbol value unit zener current (see table "characteristics") power dissipation p tot 1.0 1) w parameter test condition symbol value unit thermal resistance junction to ambient air r ja 170 1) c/w junction temperature t j 150 c storage temperature t s - 65 to + 150 c
www.vishay.com 2 document number 85786 rev. 1.3, 19-mar-04 vishay zm4728a to zm4764a vishay semiconductors electrical characteristics 1) the zener impedance is derived from the 1kh z ac voltage which results when an ac current having an rms value equal to 10 % of the zener current (i zt or i zk ) is superimposed on i zt or i zk . zener impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units 2) valid provided that electrodes at a distance of 10 mm from case are kept at ambient temperature 3) measured under thermal equilib rium and dc test conditions. partnumber nominal zener voltage 3) test current maximum zener impedance 1) maximum reverse leakage current surge current maximum reverse leakage current 2) v z @ i zt i zt z zt @ i zt z zk @ i zk i zk i r v r i r @ t amb = 25 c i zm v ma ? ma a v ma a zm4728 3.3 76 10 400 1 100 1 1380 276 zm4729 3.6 69 10 400 1 100 1 1260 252 zm4730 3.9 64 9 400 1 50 1 1190 234 zm4731 4.3 58 9 400 1 10 1 1070 217 zm4732 4.7 53 8 500 1 10 1 970 193 zm4733 5.1 49 7 550 1 10 1 890 178 zm4734 5.6 45 5 600 1 10 2 810 162 zm4735 6.2 41 2 700 1 10 3 730 146 zm4736 6.8 37 3.5 700 1 10 4 660 133 zm4737 7.5 34 4 700 0.5 10 5 605 121 zm4738 8.2 31 4.5 700 0.5 10 6 550 110 zm4739 9.1 28 5 700 0.5 10 7 500 100 zm4740 10 25 7 700 0.25 10 7.6 454 91 zm4741 11 23 8 700 0.25 5 8.4 414 83 zm4742 12 21 9 700 0.25 5 9.1 380 76 zm4743 13 19 10 700 0.25 5 9.9 344 69 zm4744 15 17 14 700 0.25 5 11.4 304 61 zm4745 16 15.5 16 700 0.25 5 12.2 285 57 zm4746 18 14 20 750 0.25 5 13.7 250 50 zm4747 20 12.5 22 750 0.25 5 15.2 225 45 zm4748 22 11.5 23 750 0.25 5 16.7 205 41 zm4749 24 10.5 25 750 0.25 5 18.2 190 38 zm4750 27 9.5 35 750 0.25 5 20.6 170 34 zm4751 30 8.5 40 1000 0.25 5 22.8 150 30 zm4752 33 7.5 45 1000 0.25 5 25.1 135 27 zm4753 36 7 50 1000 0.25 5 27.4 125 25 zm4754 39 6.5 60 1000 0.25 5 29.7 115 23 zm4755 43 6 70 1500 0.25 5 32.7 110 22 zm4756 47 5.5 80 1500 0.25 5 35.8 95 19 zm4757 51 5 95 1500 0.25 5 38.8 90 18 zm4758 56 4.5 110 2000 0.25 5 42.6 80 16 zm4759 62 4 125 2000 0.25 5 47.1 70 14 zm4760 68 3.7 150 2000 0.25 5 51.7 65 13 zm4761 75 3.3 175 2000 0.25 5 56 60 12 zm4762 82 3 200 3000 0.25 5 62.2 55 11 zm4763 91 2.8 250 3000 0.25 5 69.2 50 10 zm4764 100 2.5 350 3000 0.25 5 76 45 9
vishay zm4728a to zm4764a document number 85786 rev. 1.3, 19-mar-04 vishay semiconductors www.vishay.com 3 typical characteristics (t amb = 25 c unless otherwise specified) package dimensions in mm (inches) fig. 1 admissible power dissipation vs. ambient temperature 18289 cathode mark 18317 1.25 (0.049) min 4.00 (0.157) max 6.50 (0.256) ref 3.00 (0.118) min 5.2 (0.205) 4.8 (0.189) 2.6 (0.102) 2.4 (0.094) 0.55 (0.022)
www.vishay.com 4 document number 85786 rev. 1.3, 19-mar-04 vishay zm4728a to zm4764a vishay semiconductors ozone depleting substances policy statement it is the policy of vishay semiconductor gmbh to 1. meet all present and future national and international statutory requirements. 2. regularly and continuously improve the performance of our products, processes, distribution and operatingsystems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. it is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (odss). the montreal protocol (1987) and its london amendments (1990) intend to severely restrict the use of odss and forbid their use within the next ten years. various national and international initiatives are pressing for an earlier ban on these substances. vishay semiconductor gmbh has been able to use its policy of continuous improvements to eliminate the use of odss listed in the following documents. 1. annex a, b and list of transitional substances of the montreal protocol and the london amendments respectively 2. class i and ii ozone depleting substances in the clean air act amendments of 1990 by the environmental protection agency (epa) in the usa 3. council decision 88/540/eec and 91/690/eec annex a, b and c (transitional substances) respectively. vishay semiconductor gmbh can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. we reserve the right to make changes to improve technical design and may do so without further notice. parameters can vary in different applications. all operating parameters must be validated for each customer application by the customer. should the buyer use vishay semiconductors products for any unintended or unauthorized application, the buyer shall indemnify vishay semiconductors against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. vishay semiconductor gmbh, p.o.b. 3535, d-74025 heilbronn, germany telephone: 49 (0)7131 67 2831, fax number: 49 (0)7131 67 2423
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