FR2543, 3543 & 4043 FASTORB - 25, 35 & 40 Amp Avalanche AUTOMOTIVE RECTIFIERS Data Sheet Mechanical Dimensions Description FR4043 .395 FR2543S .337 Note: Ring Markings on Cathode Options - Add Suffix to Part #: FR2543L = 2 Leads; FR4043L = 2 Leads For 1 Lead Small Pkg: FR2543SC = Lead On Cathode FR3543SA = Lead On Anode Leads 1.00 typ. .05 Dia. .220 .241 .175 Note: FR4043 is offered only in 10mm (.395" Dia.) package. Features n INEXPENSIVE n AVALANCHE VOLTAGE 39 TO 47 VOLTS n GLASS PASSIVATED DIE Electrical Characteristics @ 25o C. Maximum Ratings Peak Repetitive Reverse Voltage Working Peak Reverse Voltage DC Blocking Voltage Repetitive Peak Reverse Surge Current FR2543 FR3543 FR4043 Average Forward Rectified Current Non-Repetitive Peak Forward Surge Current Thermal Resistance, Junction to Lead Both Equal Length Leads to Heat Sink RθJL Thermal Resistance, Junction to Case RθJC FR2543 FR3543 FR4043 FR2543 FR3543 FR4043 FR2543, 3543 & 4043 Symbol Value VRRM 33 VRWM 33 VDC 33 IRSM 0.11 150 200 IO 25 35 50 IFSM 250 400 500 Length Max. Units IRRM (EXP) ¼" ¾" 8 ½" 7.5 10 13 °C / W °C / W °C / W IRRM (EXP) .8 Typ Instantaneous Forward Voltage (IF = 100 Amps, TC = 25°C)...VF Instantaneous Reverse Current (VR = 33 VDC, TC = 25°C)...IR Breakdown Voltage (IR = 100 mAmps, TC = 25°C)...VBR Clamping Voltage (IR = 90 Amps, TC = 150°C, PW = 80 µS)...VBR Breakdown Voltage Temperature Coefficient...V(br) TC Forward Voltage Temperature Coefficient...(IF = 10 mA) VF(tc) °C / W Units Volts Volts Volts Amps Amps Amps Amps Amps Amps Amps Amps Amps Fig. Fig. 11 0 10 30 50 Surge Current Characteristics Min. N/A N/A 39 N/A N/A N/A Max. 1.10 1.0 47 40 0.096 2 Units Volts µAmps Volts Volts % / °C mV / °C Page 2-19