OV/OC Protection of AC Mains

Datasheets and Downloads

Online Tools

Technical Centers

Application Designs

Circuit Protection of AC Mains - OV/OC



Design Notes:

Protection Application:
The AC mains (120 to 250VACrms) will be exposed to severe surge transients (lightning, load switching, etc.) and short circuit/overload conditions.
Solution Description:
WIA cartridge or leaded fuse (Pico, 5x20mm, 2AG, 3AG, TE5/TR5) can be used for short circuit and overload current conditions. For surge protection, an MOV should be used. The MOV should be selected based on the expected severity (energy, voltage and peak pulse current) of the transient surge. The specific family (C-III, UltraMOV or LA) can be determined after the surge severity is understood.
Companion Solutions:
Does not apply.
Regulatory Issues:
Standards will vary depending on the product to be protected. Examples include: UL 2158 IEC 60335-2-43
Unique Features:
Does not apply.
Application Warnings:
When selecting the fuse, be sure to consider the expected temperature in the area around the fuse, as well as the in-rush currents. Failure to take these factors into account may result in premature or nuisance tripping of the fuse.

Solutions

Solutions