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Introduction to Circuit Protection

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<strong>Introduction</strong> <strong>to</strong> <strong>Circuit</strong> <strong>Protection</strong><br />

Transien<strong>to</strong>logy<br />

ESD Suppressor Selection Guide<br />

Littelfuse manufacturers three different surface mount product families for ESD suppression. Each technology provides distinct attributes for<br />

compatibility <strong>to</strong> specific circuit requirements.<br />

1. Review the circuit requirements or parameters from the left hand column and compare them <strong>to</strong> the Littelfuse product offerings shown.<br />

2. Refer <strong>to</strong> Littelfuse data sheets and application notes for complete technical information<br />

PulseGuard ®<br />

Suppressors<br />

Surface<br />

Silicon <strong>Protection</strong> Arrays Multilayer Varis<strong>to</strong>rs<br />

Mount Surface Mount Surface Mount<br />

Series Name PGB1 SP72X SP05X SPUSB1 ML MLE MLN MHS<br />

Technology Type<br />

Polymer<br />

Silicon<br />

SCR/Diode<br />

TVS<br />

Avalanche<br />

Diode<br />

USB Port Termina<strong>to</strong>r<br />

(w/ESD Suppression<br />

and EMI Filter)<br />

MLV<br />

ZnO<br />

MLV<br />

ZnO<br />

MLV<br />

ZnO<br />

MLV<br />

ZnO<br />

Working Voltage 0-24VDC 0-30VDC 0-5.5VDC 0-5.5VDC<br />

Array Package SOT23 (2),<br />

(No. of Lines)<br />

0805 (4)<br />

0-120VDC<br />

range by type<br />

0-18VDC 0-18VDC 0-42VDC<br />

DIP, SOIC<br />

(6, 14)<br />

SOT23<br />

SC70 (2,4,5),<br />

SOT23 (2,4,5),<br />

SOT143 (3),<br />

SC70-6<br />

(3)<br />

No No<br />

0805<br />

(4)<br />

1206 No<br />

(4) TSSOP-8 (4),<br />

MSOP-8 (6)<br />

(4)<br />

Single Line Package 0603 No No No 0402-1210 0402-1206 ––––– 0402, 0603<br />

Typical Device Capacitance 0.05pF 3-5pF 30pF 47pF 40-6000pF 40-1700pF 45-430pF 3-22pF<br />

Leakage Current

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