B5817WS/B5819WS Surface Mount Schottky Barrier Diodes Features: SMALL SIGNAL SCHOTTKY DIODES 1.0 AMPERES 20-40 VOLTS *Low Forward Voltage *Very Small Conduction Losses *Schottky Barrier Diodes Encapsulated in a SOD-323 Package Description: These schottky barrier diodes are designed for high speed switching applications circuit protection, and voltage clamping, Extremely low forward voltage reduces conduction loss, Miniature surface mount package is excellent for hand held and portable applications where space is limited. SOD-323 1 WEITRON http://www.weitron.com.tw 1/3 03-Jun-05 B5817WS/B5819WS Maximum Ratings ( TA=25°C Unless otherwise noted) Characteristic Symbol B5817WS B5819WS Unit Peak Repetitive Reverse Voltage Working Peak Reverse Voltage DC Blocking Voltage VRRM VRWM VR 20 40 V Average Rectified Output Current VR(RMS) IFAV 14 28 V A RMS Reverse Voltage Non-Repetitive Peak Forward Surge Current 8.3ms single half sine-wave superimpose on rated load (JEDEC Method) IFSM 4.0 A PD 200 mW R JA 625 °C/W TJ TSTG -55 to +150 °C Power Dissipation Typical thermal Resistance junction to Ambient Note (1) Operating & Storage Temperature Range Electrical Characteristics ( TA=25 °C Unless otherwise noted) Symbol Characteristic Minimum Reverse Breakdown Voltage (IR=1mA) 1.0 B5817WS B5819WS Unit 20 40 V VF 0.45 0.75 0.60 0.90 V IR 1.0 - 1.0 mA (2) V(BR)R Forward Voltage Note(2) IF=1A Tj=25°C IF=3A Tj=25°C Reverse Current Note(2) VR=20V, Tj=25°C VR=40V, Tj=25°C Cj Junction Capacitance f=1MHZ, VR=4VDC PF 120 Device Marking Item Marking Eqivalent Circuit diagram B5817WS SJ 1 2 B5819WS SL 1 2 Note: 1. Valid provited that leads are kept at ambient tememperature. 2. Pulse Test : Pulse width = 300µs, Duty Cycle ≤ 2% WEITRON http://www.weitron.com.tw 2/3 03-Jun-05 B5817WS/B5819WS 10 1.4 IF, INSTANTNEOUS FWD CURRENT (A) IO, AVERAGE RECITIFIED CURRENT (A) 1.8 1.2 1.0 0.8 0.6 0.4 0.2 0 0 25 50 75 100 125 B5817WS 1.0 0.1 0.01 150 B5819WS 0 0.2 0.4 0.6 0.8 1.0 TL, LEAD TEMPERATURE ( C) VF, INSTANTANEOUS FORWARD VOLTAGE (V) FIG, 1 Forward Current Derating Curve Fig, 2 Typical Forward Characterictics Cj , CAPACITANCE (pF) 1000 100 10 1.0 0 5 10 15 20 VR.REVERSE VOLTAGE (V) Fig, 3 Typ, Junction Capacitance vs. Reverse Voltage WEITRON http://www.weitron.com.tw 3/3 03-Jun-05