WOST04 thru WOST12 Surface Mount TVS Diode Array for ESD Protection TRANSIENT VOLTAGE SUPPRESSORS 300 WATTS 4-12 VOLTS 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. 3 1 2 SOT-23 Features: * Unidirectional Transil functions * Low leakage current: IR max< 20 μA at VRM * 300W peak pulse power(8/20μs) * Transient protection for data lines as per IEC61000-4-2(ESD) 15KV(air) 8KV(contact) IEC61000-4-5(Lightning) see IPPM below Mechanical Data: * Case : Molded Epoxy * Marking : Marking Code * Weight : 0.008 grams(approx) SOT-23 Outline Dimensions Unit:mm A B TOP VIEW E G C D H K J WEITRON http://www.weitron.com.tw L M 1/3 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 25-Apr-07 WOST04 thru WOST12 Maximum Ratings(TA=25˚C Unless Otherwise Noted) Symbol Value Unit Peak Pulse Power Dissipation (t P= 8/20μs) PPP 300 W Lead Soldering Temperature TL 260(10s) °C Junction Temperature Range TJ 150 °C Operating Temperature Range Top -40 to +125 °C Storage Temperature Range Tstg -55 to +150 °C Vpp 15 8 kv Characteristic Electrostatic Discharge IEC61000-4-2 air discharge IEC61000-4-2 contact discharge Electrical Characteristics(TA=25˚C Unless Otherwise Noted) Part Number Marking Code Max Reverse Leakage @VRWM Reverse Stand off Voltage Breakdown Voltage VBR@1mA Max Clamping Voltage @1A Max Clamping Voltage @5A Max Pulse Peak Current tp=8/20us IR(µA) VRWM(V) MIN(V) Vc(V) Vc(V) (A) (PF) Capacitance @0V,IMHZ WOST04 04 20 4.0 5.0 8.5 10.5 17 300 WOST05 05 20 5.0 6.0 9.8 12.5 17 220 WOST08 08 5.0 8.0 8.5 13.4 15.0 15 190 WOST12 12 1.0 12.0 13.3 19.0 28 12 150 Eqivalent Circuit Diagram: directional Configuration WEITRON http://www.weitron.com.tw 2/3 25-Apr-07 WOST04 thru WOST12 10 110 % of Rated Power or I PP Peak Puse Po wer - P PK (kW) 100 1 0.1 Peak Pluse Power 8/20µs 90 80 70 60 50 40 Average Power 30 20 10 0 0.01 0.1 1 10 100 1000 Ipp-peak Pulse Current(% of Ipp) tf 90 80 e-t 60 75 100 125 150 Test Waveform Parameters tf = 8µs td = 20µs Peak Value Ipp 70 50 FIG.2 Power Derating Curve FIG.1 Peak Pulse Power vs. Pulse Time 100 25 Lead Temperature - TL (ºC) P ulse Duration - t d (µ s) 110 0 50 t d = t IPP/ 2 40 30 20 10 0 0 5 10 15 Time (µs) 20 25 30 FIG.3 Pulse Waveform WEITRON http://www.weitron.com.tw 3/3 25-Apr-07