technical data npn silicon switching transistor qualified per mil - prf - 19500/312 devices qualified level 2n708 ja n , jantx maximum ratings ratings symbol value units collector - emitter voltage v ceo 15 vdc collector - base voltage v cbo 40 vdc emi tter - base voltage v ebo 5.0 vdc collector - emitter voltage v cer 20 vdc total power dissipation @ t a = +25 0 c (1) @ t c = +25 0 c (2) p t 0.36 1.2 w w operating & storage junction temperature range t op , t stg - 65 to +200 0 c 1) derate linearly 2.06 mw/ 0 c for t a > 25 0 c 2) derate linearly 6.90 mw/ 0 c for t c > 25 0 c to - 18 (to - 206aa)* *see appendix a for package outline electrical characteristics (t a = 25 0 c unless otherwise noted) characteristics symbol min. max. u nit off characteristics collector - base breakdown voltage i c = 1.0 m adc v (br) cbo 40 vdc emitter - base breakdown voltage i e = 10 m adc v (br) ebo 5.0 vdc collector - emitter breakdown voltage i c = 10 madc v (br) ceo 15 vdc collector - emitter br eakdown voltage i c = 10 madc, r be 10 w v (br) cer 20 vdc collector - base cutoff current v cb = 20 vdc i cbo 25 h adc emitter - base cutoff current v eb = 4.0 vdc i ebo 80 h adc 6 lake street, lawrence, ma 01841 1 - 800 - 446 - 1158 / (978) 794 - 1 666 / fax: (978) 689 - 0803 120101 page 1 of 2
2n 708 jantx series electrical characteristics (con?t) characteristics symbol min. max. unit on characteristics (3) forward - current transfer ratio i c = 0.5 ma dc, v ce = 1.0 vdc i c = 10 madc, v ce = 1.0 vdc h fe 15 40 120 collector - emitter saturation voltage i c = 10 madc, i b = 1.0 madc v ce(sat) 0.40 vdc base - emitter voltage i c = 10 madc, i b = 1.0 madc i c = 1.0 madc, i b = 0.1 madc v be(sat) 0. 72 0.80 0.72 vdc dynamic characteristics small - signal short - circuit forward current transfer ratio i c = 10 madc, v ce = 10 vdc, f = 100 mhz ? h fe ? 3.0 9.0 output capacitance v cb = 10 vdc, i e = 0, f = 1.0 mhz c obo 6.0 p | input capacitance v eb = 0.5 vdc, i c = 0, f = 1.0 mhz c ibo 9.0 p | switching characteristics charge storage time i c = i b1 = - i b21 = 10 madc t s 25 h s turn - on time v be ? - 2.0 vdc; i c ? 10 madc; i b1 ? 3.0 m adc t on 40 h s turn - off time i c ? 10 madc; i b1 ? 3.0 madc, i b2 ? - 1.0 m adc t off 75 h s (3) pulse test: pulse width = 300 m s, duty cycle 2.0%. 6 lake street, lawrence, ma 01841 1 - 800 - 446 - 1158 / (978) 794 - 1666 / fax: (978) 689 - 0803 120101 page 2 of 2
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