, {j na. 20 stern ave. springfield, new jersey 07081 u.s.a. 2N4277 (germanium) telephone: (973) 376-2922 (212)227-6005 fax: (973) 376-8960 pnp germanium power transistor designed for high current applications requiring high-gain and low satu- ration voltages. maximum ratings rating collector-emitter voltage collector-emitter voltage collector- bast voltage emitter-sue voltage collector current? continuous * total device dissipation 0 tc * 25 c derate above 25" c operating and storage junction temperature range symbol vceo vces vcb veb v v tj' tstg 2N4277 20 30 30 20 *? 60- *? 170. - ? 2.0- 8$ to +11* unit vde vde vde vde adc watts w/*c ?c thermal characteristics characteristic thermal resistance, junction to case symbol ?jc max ? 0.5 < unit ?c/w collector connected to case (to-3 electrical characteristics (tc?23'cunmi tc * +7t*c' collklor cutoff curr?i* (vcb.mvde, i.-oi emitter cutoff current (vbi-20vde, ic-0) (vbi - 20 vde, lc - 0, tc . ttl'c) bv t bvces 'cbx 'cbo 'ebo ?' jo " . - - * . *. . - 15 o.? 4.0 4.0 is vde vde raade nade madc on characteristics dc current galnt (ic-15ade, vce .2.0 vde) (ic'?oade, vce ?j.ovdc) collector-emlttsr satuntlon volug?t dc -15 ade, ib- 1.0 adc) (tc . 90 ade, lfl - ?. 0 adc) bii?. emitter saturation voltafet dc -is ade, ib>1.0ade) dc = 80 adc, ib - ?. 0 ade) w vce(?at)f vbe(.^)f 80 is - - lid 0.19 0.3 0. ? 1.0 vde vde small signal characteristics common-emuttr cutoff frequency dc = 15 ade, vck?2.0vdc:) 'a. 2.0 - khz t to avoid excessive heating of the collector junction, perform teat with pula<) method.
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