?2004 fairchild semiconductor corporation 1n4938, rev. a1 1n4938 small signal diode absolute maximum ratings * t a = 25 c unless otherwise noted * these ratings are limiting values above which the serviceability of the diode may be impaired. notes: 1) these ratings are based on a maximum junction temperature of 200 degrees c. 2) these are steady limits. the factory should be consulted on applications involving pulsed or low duty cycle operations. thermal characteristics electrical characteristics t a =25 c unless otherwise noted symbol parameter value units v rrm maximum repetitive reverse voltage 200 v i f(av) average rectified forward current 500 ma i fsm non-repetitive peak forward surge current pulse width = 1.0 second pulse width = 1.0 microsecond 1.0 4.0 a a t stg storage temperature range -65 to +200 c t j operating junction temperature 175 c symbol parameter value units p d power dissipation 500 mw r ja thermal resistance, junction to ambient 300 c/w symbol parameter test conditions min. max. units v r breakdown voltage i r = 100 a 200 v v f forward voltage i f = 100ma 1.0 v i r reverse leakage v r = 75v v r = 175v, t a = 175 c 100 100 na a c t total capacitance v r = 0v, f = 1mhz 5 pf t rr reverse recovery time i f = 3ma, i r = 30ma i rr = 1ma, r l = 100 ? 50 ns 1n4938 do-35 color band denotes cathode
?2004 fairchild semiconductor corporation disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information formative or in design this datasheet contains the design specifications for product development. specifications may change in any manner without notice. preliminary first production this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. no identification needed full production this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. obsolete not in production this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. rev. i13 trademarks the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. fast ? fastr? fps? frfet? globaloptoisolator? gto? hisec? i 2 c? i-lo ? implieddisconnect? isoplanar? littlefet? microcoupler? microfet? micropak? microwire? msx? msxpro? ocx? ocxpro? optologic ? optoplanar? pacman? pop? power247? poweredge? powersaver? powertrench ? qfet ? qs? qt optoelectronics? quiet series? rapidconfigure? rapidconnect? serdes? silent switcher ? smart start? spm? stealth? superfet? supersot?-3 supersot?-6 supersot?-8 syncfet? tinylogic ? tinyopto? trutranslation? uhc? ultrafet ? vcx? a cex? activearray? bottomless? coolfet? crossvolt ? dome? ecospark? e 2 cmos? ensigna? fact? fact quiet series? across the board. around the world.? the power franchise ? programmable active droop?
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