SMD Switching Diodes BAS21/A/C/S-HF RoHS Device Halogen Free Features - Fast switching device (Trr < 50 nS). SOT-23 - Power dissipation of 225mW. - High stability and high reliability. 0.118(3.00) - Low reverse leakage. 0.110(2.80) 3 0.055(1.40) 0.047(1.20) Mechanical data 1 2 0.079(2.00) - Case: SOT-23, molded plastic. 0.071(1.80) 0.006(0.15) - Epoxy UL: 94V-0. 0.003(0.08) 0.100(2.55) 0.041(1.05) - Mounting position: Any. 0.089(2.25) 0.035(0.90) 0.004(0.10) 0.000(0.00) Circuit Diagram 0.019(0.50) 0.020(0.50) 0.012(0.30) 0.012(0.30) 3 3 3 3 Dimensions in inches and (millimeter) 1 2 1 2 1 2 1 2 BAS21-HF BAS21A-HF BAS21C-HF BAS21S-HF Maximum Ratings (at Ta=25C unless otherwise noted) Symbol Parameter Value Unit Reverse voltage VR 250 V Peak repetitive reverse voltage VRRM 250 V Power dissipation PD 225 mW Forward continuous current IFM 400 mA Repetitive peak forward surge current IFRM 625 mA Non-repetitive peak forward surge current t = 8.3ms, TA=25C IFSM 2.5 A Operating junction temperature TJ 150 C Storage temperature range TSTG -55 to +150 C Thermal resistance from junction to ambient R JA 555 C/W Company reserves the right to improve product design , functions and reliability without notice. REV:A QW-J0020 Page 1 Comchip Technology CO., LTD.SMD Switching Diodes Electrical Characteristics (at Ta=25C unless otherwise noted) Symbol Parameter Conditions Min. Max. Unit Reverse voltage IR = 100 A V(BR) 250 V Reverse leakage current VR = 200V IR 0.1 A IF = 100mA 1.00 Forward voltage VF V IF = 200mA 1.25 Reverse recovery time IF = IR = 30mA, Irr = 0.1xIR, RL = 100 Trr 50 nS Capacitance VR = 0V, f = 1MHz pF CT 5 Rating and Characteristic Curves (BAS21/A/C/S-HF) Fig.1 - Forward Characteristics Fig.2 - Reverse Characteristics 1000 1000 Ta=100C 100 Ta=100C 100 Ta=25C 10 1 10 Ta=25C 0.1 0.01 1 0 0.4 0.8 1.2 1.6 2.0 0 40 80 120 160 200 Forward Voltage, VF (V) Reverse Voltage, VR (V) Fig.3 - Capacitance Characteristics Fig.4 - Power Derating Curve 1.6 300 Ta=25C f=1MHz 250 1.4 200 1.2 150 1.0 100 0.8 50 0.6 0 0 4 8 12 16 20 0 25 50 75 100 125 150 Reverse Voltage, VR (V) Ambient Temperature, Ta (C) Company reserves the right to improve product design , functions and reliability without notice. REV:A QW-J0020 Page 2 Comchip Technology CO., LTD. Capacitance Between Terminals, CT (pF) Forward Current, IF (mA) Power Dissipation, PD (mW) Reverse Current, IR (nA)