Power Electronics
 Fuse Speeds Charging Of Smartphones, Tablets

Fuse Speeds Charging Of Smartphones, Tablets

Littelfuse has introduced the compact 777 Series Fuse to provide protection for higher-wattage wall-mount chargers for battery-powered electronic equipment. Although chargers for earlier generations of mobile phones had relatively low wattage (typically about 5 W), today's highly compact chargers must often be able to handle 10-15 W of power, which requires withstanding higher levels of current. The axial lead, 3.6 mm x 9 mm 777 Series Fuse incorporates an innovative type of filler material that provides a finely tuned balance between the surge tolerance necessary to prevent nuisance fuse tripping with the fuse's ability to open safely when a short-circuit occurs. The 777 Series' robust design lets it withstand up to 24 hits of 7.5 kV ringwave surge; it will open safely on a direct short condition without producing soot, sparks, and sounds. Typical applications include wall-mount smartphone and tablet chargers and 10-20 W power supply modules for other battery-powered consumer electronics.

Key benefits:

·     Its high interrupting rating design ensures the fuse will open safely under short-circuit conditions without producing soot, sparks, or popping noises.

·     The high surge withstand capability prevents nuisance tripping of the fuse caused by transient surges.

·     The fuse's 3.6 mm x 9 mm footprint conserves board space, which makes it suitable for use in compact wall-mount charger designs.

·     Its epoxy coating provides insulation on the vertically mounted fuse body.

The 777 Series Fuse is available in quantities of 1,000 in tape and reel packaging. 

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