Fusing to prevent overcur-rent damage is critical in hot-swap design. Targeting this need, the 5V STEF05 and 12V STEF12 electronic fuses from STMicroelectronics can replace larger conventional fuses or other protection devices. Unlike fuses, however, they neither suddenly cut the power nor require replacement after actuating. The 3x3-mm devices restrict the supply current, thus protecting the connected circuitry, and ultimately turn off the protected equipment if the fault persists.
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