description features n inexpensive n glass passivated die n avalanche voltage 39 to 47 volts electrical characteristics @ 25 o c. maximum ratings fr2543, 3543 & 4043 fr2543, 3543 & 4043 v rrm 33 volts v rwm 33 volts v dc 33 volts i rsm 0.11 amps 150 amps 200 amps i o 25 amps 35 amps 50 amps i fsm 250 amps 400 amps 500 amps symbol value units data sheet f ast o rb - 25, 35 & 40 amp avalanche automotive rectifiers ?" 7.5 c / w ?" 10 c / w ?" 13 c / w .8 typ c / w instantaneous forward voltage (i f = 100 amps, t c = 25 c)...v f instantaneous reverse current (v r = 33 v dc , t c = 25 c)...i r breakdown voltage (i r = 100 mamps, t c = 25 c)...v br clamping voltage (i r = 90 amps, t c = 150 c, pw = 80 m s)...v br breakdown voltage temperature coefficient...v (br) t c forward voltage temperature coefficient...(i f = 10 ma) v f(tc) fig. 1 fig. 1 fig. 1 fig. 1 fig. 1 length length length length length max. max. max. max. max. units units units units units n/a 1.10 volts n/a 1.0 m amps 39 47 volts n/a 40 volts n/a 0.096 % / c n/a 2 mv / c min. min. min. min. min. max. max. max. max. max. units units units units units peak repetitive reverse voltage working peak reverse voltage dc blocking voltage repetitive peak reverse surge current fr2543 FR3543 fr4043 average forward rectified current fr2543 FR3543 fr4043 non-repetitive peak forward surge current fr2543 FR3543 fr4043 thermal resistance, junction to lead both equal length leads to heat sink r q jl thermal resistance, junction to case r q jc 8 note: ring markings on cathode note: fr4043 is offered only in 10mm (.395" dia.) package. page 2-19 fig. 1 fig. 1 fig. 1 fig. 1 fig. 1 surge current characteristics i rrm (exp) i rrm (exp) 0 10 30 50 .220 .241 .175 leads 1.00 typ. .05 dia. mechanical dimensions fr2543s .337 fr4043 .395 options - add suffix to part #: fr2543l = 2 leads; fr4043l = 2 leads for 1 lead small pkg: fr2543sc = lead on cathode FR3543sa = lead on anode
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