bc557b small signal pnp transistor n silicon epitaxial planar pnp transistor n to-92 package suitable for through-hole pcb assembly n the npn complementary type is bc547b n applications n well suitable for tv and home appliance equipment n small load switch transistor with high gain and low saturation voltage ? internal schematic diagram january 2003 type marking bc557b bc557b absolute maximum ratings symbol parameter value unit v cbo collector-base voltage (i e = 0) -50 v v ceo collector-emitter voltage (i b = 0) -45 v v ebo emitter-base voltage (i c = 0) -5 v i c collector current -100 ma i cm collector peak current -200 ma p tot total dissipation at t c = 25 o c 500 mw t stg storage temperature -65 to 150 o c t j max. operating junction temperature 150 o c to-92 1/4
thermal data r thj-amb r thj-case thermal resistance junction-ambient max thermal resistance junction-case max 250 83.3 o c/w o c/w electrical characteristics (t case = 25 o c unless otherwise specified) symbol parameter test conditions min. typ. max. unit i cbo collector cut-off current (i e = 0) v cb = -30 v v cb = -30 v t c = 150 o c -1 -15 -4 na m a i ebo emitter cut-off current (i c = 0) v eb = -5 v -100 na v (br)ceo * collector-emitter breakdown voltage (i b = 0) i c = -10 ma -45 v v ce(sat) * collector-emitter saturation voltage i c = -10 ma i b = -0.5 ma i c = -100 ma i b = -5 ma -0.06 0.18 -0.3 -0.65 v v v be(sat) * base-emitter saturation voltage i c = -10 ma i b = -0.5 ma i c = -100 ma i b = -5 ma -0.75 -0.93 v v v be(on) * base-emitter on voltage i c = -2 ma v ce = -5 v i c = -10 ma v ce = -5 v -0.6 -0.65 -0.75 -0.82 v v h fe dc current gain i c = -2 ma v ce = -5 v 220 475 f t transition frequency i c = -10 ma v ce = -5 v f = 100mhz 100 mhz c cbo collector-base capacitance i e = 0 v cb = -10 v f = 1 mhz 3 pf c ebo emitter-base capacitance i c = 0 v eb = -0.5 v f = 1 mhz 10 pf nf noise figure v ce = -5 v i c = -200 m a f = 1khz d f = 200 hz r g = 2 k w 210db * pulsed: pulse duration = 300 m s, duty cycle 2 % bc557b 2/4
dim. mm inch min. typ. max. min. typ. max. a 4.32 4.95 0.170 0.195 b 0.36 0.51 0.014 0.020 d 4.45 4.95 0.175 0.194 e 3.30 3.94 0.130 0.155 e 2.41 2.67 0.095 0.105 e1 1.14 1.40 0.045 0.055 l 12.70 15.49 0.500 0.609 r 2.16 2.41 0.085 0.094 s1 1.14 1.52 0.045 0.059 w 0.41 0.56 0.016 0.022 v 4 degree 6 degree 4 degree 6 degree to-92 mechanical data bc557b 3/4
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