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Circuit Protection Selection Guide
Consult this guide to learn about circuit protection considerations and the solutions Littelfuse offers. Tables help match products with applications.
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Littelfuse makes two types of specialty surface mount varistors for suppressing low-energy transient voltage surges and protecting electronics from electrostatic discharges. Our MA series metal oxide varistors feature radial leads and give users the choice of standard or tightened clamping voltage ratings. Our RA series surge protective devices have inline leads and feature seating planes that ensure secure mounting on printed circuit boards. This mechanical stability makes the MA series specialty varistors good choices for overvoltage protection in industrial and military applications subject to strong vibrations.
- Available with maximum ac voltage operating ratings from 4 V ac to 264 V ac
- Available with maximum dc voltage operating ratings from 5.5 V dc to 369 V dc
- Available with transient energy ratings (Wtm) from 40 mJ to 23 J
- Peak pulse current capabilities up to 1.2 kA
- Certified lead-free, halogen-free, and RoHS compliant
- No derating until ambient temperatures rise above the upper limits of devices’ nominal operating temperatures
- Available with axial leads or in-line leads
- Subminiature international standard packages
- Compatible with high-volume chip assembly processes
Specialty Parts
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