1N4448 HIGH SPEED SWITCHING DIODE DO - 35 Glass (DO-204AH) FEATURES : • High switching speed: max. 4 ns • Reverse voltage:max. 75V • Peak reverse voltage:max. 100 V • Pb / RoHS Free 1.00 (25.4) min. 0.079(2.0 )max. 0.150 (3.8) max. Cathode Mark 1.00 (25.4) min. 0.020 (0.52)max. MECHANICAL DATA : Case: DO-35 Glass Case Weight: approx. 0.13g Dimensions in inches and ( millimeters ) Maximum Ratings and Thermal Characteristics (Rating at Parameter 25 °C ambient temperature unless otherwise specified.) Symbol Value Unit Maximum Peak Reverse Voltage VRM 100 V Maximum Reverse Voltage VR 75 V Maximum Continuous Forward Current IF 200 mA IF(AV) 150 mA Maximum Average Forward Current (1) Half Wave Rectification with Resistive Load , f ≥ 50 Hz Maximum Surge Forward Current at t < 1s , Tj = 25°C IFSM 0.5 A Maximum Power Dissipation PD 500 mW Maximum Junction Temperature TJ 175 °C Storage Temperature Range TS -65 to + 175 °C Note : (1) Valid provided that leads at a distance of 8mm from case are kept at ambient temperature Electrical Characteristics (TJ = 25°C unless otherwise noted) Parameter Symbol Reverse Current IR Forward Voltage VF Reverse Breakdown Voltage Diode Capacitance Reverse Recovery Time Page 1 of 2 V(BR)R Cd Trr Test Condition VR = 20 V VR = 20 V , Tj = 150 °C IF = 10 mA IR = 100 µA (pulsed) f = 1MHz ; VR = 0 IF = 10 mA to IR = 1mA VR = 6V , RL = 100 Ω Min. Typ. Max. Unit - - 25 50 nA µA - - 1.0 V 100 - - V - - 4.0 pF - - 4.0 ns Rev. 02 : March 25, 2005 RATING AND CHARACTERISTIC CURVES ( 1N4448 ) FIG. 1 MAXIMUM FORWARD CURRENT VERSUS AMBIENT TEMPERATURE FIG. 2 TYPICAL FORWARD VOLTAGE 1000 Forward Current , IF (mA) AVERAGE FORWARD OUTPUT CURRENT, mA 200 150 100 50 100 TJ = 25°C 10 1 0.1 0 0.01 0 100 200 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Forward Voltage , VF (V) Ambient Temperature , Ta (°C) FIG. 3 TYPICAL DIODE CAPACITANCE AS A FUNCTION OF REVERSE VOLTAGE 1.2 Diode Capacitance , Cd (pF) 1.0 0.9 0.8 0.7 f = 1MHz; TJ = 25°C 0.6 0.5 0.4 0 10 20 Reverse Voltage , VR (V) Page 2 of 2 Rev. 02 : March 25, 2005