WOST08

WOST04 thru WOST12 Surface Mount TVS Diode Array for ESD Protection P b Lead(Pb)-Free Description: * The WOSTxx is a transient voltage suppressor designed to protect components which are connected to data and transmission lines against ESD. It clamps the voltage just above the logic level supply for positive transients, and to a diode drop below ground for negative transients. TRANSIENT VOLTAGE SUPPRESSORS 300 WATTS 4-12 VOLTS 3 1 2 Features: * Unidirectional Transil functions * Low leakage current: IR max< 20 A at VRM * 300W peak pulse power(8/20 s) * Transient protection for data lines as per IEC61000-4-2(ESD) 15KV(air) 8KV(contact) IEC61000-4-5(Lightning) see IPPM below SOT-23 Mechanical Data: * Case : Molded Epoxy * Marking : Marking Code * Weight : 0.008 grams(approx) SOT-23 Outline Dimensions A Unit:mm TOP VIEW B C E G H D K L J M Dim A B C D E G H J K L M Min 0.35 1.19 2.10 0.85 0.46 1.70 2.70 0.01 0.89 0.30 0.076 Max 0.51 1.40 3.00 1.05 1.00 2.10 3.10 0.13 1.10 0.61 0.25 WEITRON http://www.weitron.com.tw 1/3 25-Apr-07 WOST04 thru WOST12 Maximum Ratings(TA=25˚C Unless Otherwise Noted) Characteristic Symbol Value Unit Peak Pulse Power Dissipation (t P= 8/20 s) Lead Soldering Temperature Junction Temperature Range Operating Temperature Range Storage Temperature Range Electrostatic Discharge IEC61000-4-2 air discharge IEC61000-4-2 contact discharge PPP TL TJ Top Tstg Vpp 300 260(10s) 150 -40 to +125 -55 to +150 15 8 W °C °C °C °C kv Electrical Characteristics(TA=25˚C Unless Otherwise Noted) Part Number Marking Code Max Reverse Leakage @VRWM IR(µA) WOST04 WOST05 WOST08 WOST12 04 05 08 12 20 20 5.0 1.0 Reverse Stand off Voltage VRWM(V) 4.0 5.0 8.0 12.0 Breakdown Voltage VBR@1mA MIN(V) 5.0 6.0 8.5 13.3 Max Clamping Voltage @1A Vc(V) 8.5 9.8 13.4 19.0 Max Clamping Voltage @5A Vc(V) 10.5 12.5 15.0 28 Max Pulse Peak Current tp=8/20us (A) 17 17 15 12 Capacitance @0V,IMHZ (PF) 300 220 190 150 Eqivalent Circuit Diagram: directional Configuration http://www.weitron.com.tw WEITRON 2/3 25-Apr-07 WOST04 thru WOST12 10 110 100 Peak Puse Po wer - P PK (kW) % of Rated Power or I PP 90 80 70 60 50 40 30 20 10 0 Peak Pluse Power 8/20µs 1 0.1 Average Power 0.01 0.1 1 10 100 1000 0 25 50 75 100 125 150 FIG.1 Peak Pulse Power vs. Pulse Time 110 P u l se Du r a ti o n - t d (µ s) FIG.2 Power Derating Curve Lead Temper ature - TL (ºC) Ipp-peak Pulse Current(% of Ipp) 100 90 80 70 60 50 40 30 20 10 0 0 5 tf Peak Value Ipp e-t t d = t IPP/ 2 Test Waveform Parameters tf = 8µs td = 20µs 10 15 Time (µs) 20 25 30 FIG.3 Pulse Waveform WEITRON http://www.weitron.com.tw 3/3 25-Apr-07