digitron semiconductors 144 market street kenilworth nj 07033 usa phone +1.908.245-7200 2n489-2n494, a, b npn silicon unijunction transistor silicon unijunction transistors are three-terminal device having a stable ?n? type negative resi stance characteristic over a wi de temperature range. features ? stable operation over wide temperature range ? low leakage current ? low peak point current ? guaranteed minimum pulse voltage ? available as ?hr? (high reliability) screened per mil-prf-1 9500, jantx level. add ?hr? su ffix to base part number. ? available non-rohs (standard) or rohs compliant (add pbf suffix). maximum ratings rating value total rms power dissipation (unstabilized) 450mw total rms power dissipation (stabilized) 600mw rms emitter current 70ma peak emitter current (t j = 150c) 2 a emitter reverse voltage (t j = 150c) 60 v operating temperature range -65 to +140c operating temperature range (stabilized) -65 to +175c storage temperature range -65 to +175c electrical characteristics ( t c = 25c unless otherwise noted) maximum minimum intrinsic standoff ratio (1) interbase resistance (2) modulated interbase current emitter saturation voltage emitter reverse current peak point current valley point current v bb = 3v i r = 50ma v bb = 10v i e = 50ma v bb = 10v v b2e = 60v t j = 150c v b2e = 10v v b2e =30v v bb = 25v r b2 = 100 ? v bb = 20v base one peak pulse voltage v rr = 10v r bbo i b2(moi) v e(sat) i eb2o i eb2o i eb2o i p i v v ob1 ? k ? ma part number min max min max min max volts a a a a ma volts 2n489 .51 .62 4.7 6.8 6.8 22 5 2 20 - 12 8 - 2n489a .51 .62 4.7 6.8 6.8 22 4 2 20 - 12 8 3 2n489b .51 .62 4.7 6.8 6.8 22 4 2 20 0.2 6 8 3 2n490 .51 .62 6.2 9.1 6.8 22 5 2 20 - 12 8 - 2n490a .51 .62 6.2 9.1 6.8 22 4 2 20 - 12 8 3 2n490b .51 .62 6.2 9.1 6.8 22 4 2 20 0.2 6 8 3 2n490c .51 .62 6.2 9.1 6.8 22 4 2 20 0.02 2 8 3 2n491 .56 .68 4.7 6.8 6.8 22 5 2 20 - 12 8 - 2n491a .56 .68 4.7 6.8 6.8 22 4.3 2 20 - 12 8 3 2n491b .56 .68 4.7 6.8 6.8 22 4.3 2 20 0.2 6 8 3 2n492 .56 .68 6.2 9.1 6.8 22 5 2 20 - 12 8 - 2n492a .56 .68 6.2 9.1 6.8 22 4.3 2 20 - 12 8 3 2n492b .56 .68 6.2 9.1 6.8 22 4.3 2 20 0.2 6 8 3 2N492C .56 .68 6.2 9.1 6.8 22 4.3 2 20 0.02 2 8 3 2n493 .62 .75 4.7 6.8 6.8 22 5 2 20 - 12 8 - 2n493a .62 .75 4.7 6.8 6.8 22 4.6 2 20 - 12 8 3 2n493b .62 .75 4.7 6.8 6.8 22 4.6 2 20 0.2 6 8 3 2n494 .62 .75 6.2 9.1 6.8 22 5 2 20 - 12 8 - 2n494a .62 .75 6.2 9.1 6.8 22 4.6 2 20 - 12 8 3 2n494b .62 .75 6.2 9.1 6.8 22 4.6 2 20 0.2 6 8 3 2n494c .62 .75 6.2 9.1 6.8 22 4.6 2 20 0.02 2 8 3 sales@digitroncorp.com fax +1.908.245-0555 www.digitroncorp.com rev. 20121023
digitron semiconductors 144 market street kenilworth nj 07033 usa phone +1.908.245-7200 2n489-2n494, a, b npn silicon unijunction transistor sales@digitroncorp.com fax +1.908.245-0555 www.digitroncorp.com rev. 20121023
digitron semiconductors 144 market street kenilworth nj 07033 usa phone +1.908.245-7200 2n489-2n494, a, b npn silicon unijunction transistor sales@digitroncorp.com fax +1.908.245-0555 www.digitroncorp.com rev. 20121023
digitron semiconductors 144 market street kenilworth nj 07033 usa phone +1.908.245-7200 2n489-2n494, a, b npn silicon unijunction transistor sales@digitroncorp.com fax +1.908.245-0555 www.digitroncorp.com rev. 20121023
digitron semiconductors 144 market street kenilworth nj 07033 usa phone +1.908.245-7200 2n489-2n494, a, b npn silicon unijunction transistor sales@digitroncorp.com fax +1.908.245-0555 www.digitroncorp.com rev. 20121023
digitron semiconductors 144 market street kenilworth nj 07033 usa phone +1.908.245-7200 2n489-2n494, a, b npn silicon unijunction transistor sales@digitroncorp.com fax +1.908.245-0555 www.digitroncorp.com rev. 20121023
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