1 publication date: march 2004 skb00003ced varistors ma3x028 series (ma28 series) silicon epitaxial planar type for reduced voltage and temperature compensation features ? extremely small reverse current i r ? high reliability with planar structure ? wide forward voltage v f range absolute maximum ratings t a = 25 c unit: mm parameter symbol conditions min typ max unit forward voltage ma3x028wa/wb v f1 i f = 10 a 0.77 v ma3x028ta/tb 1.15 forward voltage ma3x0280a v f2 i f = 1.5 ma 0.56 0.61 v ma3x0280b 0.59 0.64 ma3x028wa i f = 3 ma 1.18 1.28 ma3x028wb 1.26 1.36 ma3x028ta 1.76 1.92 MA3X028TB 1.88 2.04 reverse current i r v r = 6 v 1.0 a temperature ma3x0280a /b ?? v f / ? ti f = 3 ma 2.0 mv/ c coefficient of ma3x028wa/b 4.6 forward voltage * 2 ma3x028ta/b 6.5 electrical characteristics t a = 25 c 3 c * 1 parameter symbol rating unit reverse voltage v r 6v peak forward ma3x0280a/b i fm 150 ma current ma3x028wa/wb 100 ma3x028ta/tb 70 power dissipation p d 150 mw junction temperature t j 125 c storage temperature t stg ? 55 to + 125 c 0.40 +0.10 ?0.05 (0.65) 1.50 +0.25 ?0.05 2.8 +0.2 ?0.3 2 1 3 (0.95) (0.95) 1.9 0.1 2.90 +0.20 ?0.05 0.16 +0.10 ?0.06 0.4 0.2 5? 10? 0 to 0.1 1.1 +0.2 ?0.1 1.1 +0.3 ?0.1 marking symbol ? ma3x0280a : md ? ma3x0280b : me ? ma3x028wa : mf ? ma3x028wb : mk ? ma3x028ta : ml ? MA3X028TB : mm note) the part numbers in the parenthesis show conventional part number. 1: anode 2: n.c. 3: cathode eiaj: sc-59 mini3-g1 package note) 1. measuring methods are based on japanese industrial standard jis c 7031 measuring methods for diodes. 2. absolute frequency of input and output is 100 mhz 3. * 1: the temperature must be controlled 25c for v f measurement. v f value measured at other temprature must be adjusted to v f (25c). * 2: t j = 25 c to 150 c
ma3x028 series 2 skb00003ced characteristics charts of ma3x028 i f ? v f v f ? t a i f ? v f v f ? t a v f ? t a i f ? v f 0 ? 40 0 80 120 40 0.2 0.4 0.6 0.8 ambient temperature t a ( c ) forward voltage v f ( v ) ma3x0280a ma3x0280b i f = 1.5 ma 10 ? 2 0 0.4 0.8 1.2 1.6 2.0 10 ? 1 1 10 10 2 forward voltage v f ( v ) forward current i f ( ma ) ma3x028wa ma3x028wb 0 ? 40 0 80 120 40 0.5 1.0 1.5 2.0 ambient temperature t a ( c ) forward voltage v f ( v ) i f = 3 ma ma3x028wa ma3x028wb 10 ? 2 0 1.0 0.5 1.5 2.0 2.5 3.0 10 ? 1 1 10 10 2 t a = 25 c forward voltage v f ( v ) forward current i f ( ma ) ma3x028ta MA3X028TB 0 ? 40 0 40 80 120 160 0.4 0.8 1.2 1.6 2.0 2.4 2.8 ambient temperature t a ( c ) forward voltage v f ( v ) ma3x028ta MA3X028TB i f = 3 ma 10 ? 2 0 0.2 0.4 0.6 0.8 1.0 10 ? 1 1 10 forward voltage v f ( v ) forward current i f ( ma ) 10 2 ma3x0280a ma3x0280b t a = 25 c characteristics charts of ma3x028w characteristics charts of ma3x028t
request for your special attention and precautions in using the technical information and semiconductors described in this material (1) an export permit needs to be obtained from the competent authorities of the japanese government if any of the products or technical information described in this material and controlled under the "foreign exchange and foreign trade law" is to be exported or taken out of japan. (2) the technical information described in this material is limited to showing representative characteristics and applied circuits examples of the products. it neither warrants non-infringement of intellectual property right or any other rights owned by our company or a third party, nor grants any license. (3) we are not liable for the infringement of rights owned by a third party arising out of the use of the technical information as described in this material. (4) the products described in this material are intended to be used for standard applications or general elec- tronic equipment (such as office equipment, communications equipment, measuring instruments and house- hold appliances). consult our sales staff in advance for information on the following applications: ? special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combus- tion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. ? any applications other than the standard applications intended. (5) the products and product specifications described in this material are subject to change without notice for modification and/or improvement. at the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date product standards in advance to make sure that the latest specifica- tions satisfy your requirements. (6) when designing your equipment, comply with the guaranteed values, in particular those of maximum rat- ing, the range of operating power supply voltage, and heat radiation characteristics. otherwise, we will not be liable for any defect which may arise later in your equipment. even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure mode, possible to occur to semiconductor products. measures on the systems such as redundant design, arresting the spread of fire or preventing glitch are recommended in order to prevent physical injury, fire, social damages, for example, by using the products. (7) when using products for which damp-proof packing is required, observe the conditions (including shelf life and amount of time let standing of unsealed items) agreed upon when specification sheets are individually exchanged. (8) this material may be not reprinted or reproduced whether wholly or partially, without the prior written permission of matsushita electric industrial co., ltd. 2003 sep
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