SMD Schottky Barrier Rectifiers CDBAS340-HF Reverse Voltage: 40 Volts Forward Current: 3.0 Amp RoHS Device Halogen Free SMA-S Features 0.191(4.85) 0.173(4.40) - High surge and current capability 0.045(1.15) Typ. - For use in low voltage, high frequency invertors free wheeling and polarity protection - Built-in strain relief 0.057(1.45) 0.051(1.30) 0.108(2.75) 0.096(2.45) - Silicon epitaxial planar chips - Metal silicon junction with guard ring 0.153(3.90) 0.132(3.35) Mechanical data 0.048(1.20) 0.031(0.80) - Epoxy: UL94-V0 rate flame retardant 0.043(1.10) Typ. - Case: Molded plastic, SMA-S - Terminals: Solder plated solderable per MIL-STD-750 method 2026 Dimensions in inches and (millimeter) - Polarity: Color band denotes cathode end Circuit diagram - Mounting position: Any - Weight: 0.045 grams(approx.) Maximum Ratings and Electrical Characteristics (at T =25°C unless otherwise noted) A Symbol Value Unit Maximum recurrent peak reverse voltage VRRM 40 V Maximum DC blocking voltage VDC 40 V Maximum RMS voltage VRMS 28 V VF 0.50 V IF(AV) 3.0 A IFSM 80 A Parameter Maximum forward voltage at 3.0A (note1) Maximum average forward current 0.2 x0.2”(5.0x5.0mm) copper pad area, see Figure 1 Peak forward surge current 8.3ms single half sine-wave superimposed on rate load (JEDEC method) Maximum DC reverse current at rated DC blocking voltage TA=25°C IR 0.1 mA 20 TA=100°C Typical junction capacitance (note2) CJ 250 PF Junction to lead RθJL 17 °C/W Junction to Ambient RθJA 55 °C/W TJ -55 to +125 °C TSTG -55 to +150 °C Typical thermal resistance (note3) Operating junction temperature range Storage temperature range Notes: 1. Pulse test: 300µS pulse width,1% duty cycle 2. Measured at 1.0MHz and applied reverse voltage of 4.0 volts 3. Thermal resistance from junction to ambient and from junction to lead P.C.B. mounted on 0.2x0.2”(5.0x5.0mm) copper pad areas. Company reserves the right to improve product design , functions and reliability without notice. REV: B QW-JB062 Page 1 Comchip Technology CO., LTD. SMD Schottky Barrier Rectifiers RATING AND CHARACTERISTIC CURVES ( CDBAS340-HF ) Fig. 2 - Maximum Non-Repetitive Peak Forward Surge Current Fig. 1 - Forward Current Derating Curve Peak Forward Surge Current, (A) Average Forward Current, (A) 3.6 3.0 2.4 1.8 1.2 single phase half wave 60HZ resistive or inductive load 0.6 100 10 TJ = 25°C 8.3ms single half sine-wave (JEDEC Method) 1 0 0 25 50 75 100 125 150 Lead Temperature, (°C) Number Of Cycles At 60Hz Fig. 3 - Typical Instantaneous Forward Characteristics Fig. 4 - Typical Reverse Characteristics 100 1.0 0.1 TJ = 25°C Pluse width 300us 1% duty cycle Instantaneous Reverse Current, (mA) 10 Instantaneous Forward Current, (A) 100 10 175 10 1.0 0.1 0.01 0.001 0.01 0 0.2 0.4 0.6 0.8 1.0 Instantaneous Forward Voltage, (V) 0 20 40 60 80 100 120 140 Percent of Rated Peak Reverse Voltage, (%) Fig. 5 - Typical Junction Capacitance Junction Capacitance, (PF) 1000 100 10 0.1 1.0 10 100 Reverse Voltage, (V) Company reserves the right to improve product design , functions and reliability without notice. REV: B QW-JB062 Page 2 Comchip Technology CO., LTD. SMD Schottky Barrier Rectifiers Reel Taping Specification d P0 P1 T E Index hole F W B P C A 12 o 0 D2 D1 D W1 Trailer Device ....... ....... End ....... ....... Leader ....... ....... ....... ....... 160mm (min) Start 400mm (min) Direction of Feed SMA-S SMA-S SYMBOL A B C d D D1 D2 (mm) 2.85 ± 0.10 5.10 ± 0.10 1.25 ± 0.05 1.55 ± 0.05 178.00 ± 2.00 75.00 ± 2.00 13.00 ± 0.50 (inch) 0.112 ± 0.004 0.201 ± 0.004 0.049 ± 0.002 0.061 ± 0.002 7.008 ± 0.079 2.953 ± 0.079 0.512 ± 0.020 SYMBOL E F P P0 P1 T W W1 (mm) 1.75 ± 0.10 5.50 ± 0.05 4.00 ± 0.10 4.00 ± 0.10 2.00 ± 0.05 0.25 ± 0.05 12.00 ± 0.10 16.80 ± 4.00 (inch) 0.069 ± 0.004 0.217 ± 0.002 0.157 ± 0.004 0.157 ± 0.004 0.079 ± 0.002 0.010 ± 0.002 0.472 ± 0.004 0.661 ± 0.157 Company reserves the right to improve product design , functions and reliability without notice. REV: B QW-JB062 Page 3 Comchip Technology CO., LTD. SMD Schottky Barrier Rectifiers Marking Code Part Number Marking Code CDBAS340-HF 34S 34S = Cathod band xxx = Product type marking code Suggested PAD Layout DO-214AC/SMA-S D SIZE (mm) (inch) A 1.90 0.075 B 1.60 0.063 C 2.70 0.106 D 5.90 0.232 C A B Standard Packaging REEL PACK Case Type DO-214AC (SMA-S) REEL Reel Size ( pcs ) (inch) 3,000 7 Company reserves the right to improve product design , functions and reliability without notice. REV: B QW-JB062 Page 4 Comchip Technology CO., LTD.