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New Littelfuse 477 Series Offers Highest AC/DC Fuse
Ratings in 5x20mm Size
The Littelfuse 477 Series is the first
and only 5x20mm fuse with ampere ratings up to 16A at 400VDC that are
also rated for 500VAC usage, making them well suited for protection
of both high-energy/power-efficient DC applications and AC power supplies.
DES PLAINES, Illinois, November 12, 2008 -
(NASDAQ/NGS:LFUS) today announced its new
of 5x20mm ceramic-body, time-lag cartridge fuses designed
for a wide range of industrial and consumer product applications.
These fuses will be of particular interest to OEMs because of
their suitability for both primary and secondary protection, which simplifies
sourcing and inventory management.
They are available in ampere
ratings from 0.5A to 16A, with an interrupting capability of up to 1500A
at 400VDC. The compact 5x20 package of the 477 Series, available in
cartridge and axial lead configurations, also provides greater design
and installation flexibility.
In comparison, for ampere ratings
of 8A and above, the nearest competitor to the 477 Series has an AC
voltage rating that is 20 percent lower, and yet a cartridge length
that is 60 percent longer.
The 477 Series fuses are RoHS-compliant/lead-free,
and are recognized under the component programs of the UL, CSA, and
SEMKO agencies. They were designed for protection of equipment such
as 3-phase power supplies, uninterruptable power systems (UPS), motor
control circuits, air conditioning units, and other high-energy applications.
Electronic designers will appreciate the ability to use these
fuses in power supply circuits both before and after the PFC (power
factor correction) capacitor banks. The 477 Series DC rating also makes
them ideal for individual component and secondary circuit protection.
Their high interrupting capacity ensures that these fuses will open
safely to protect the equipment under very high-current DC short-circuit
OEM samples and production quantities
are available now. For initial orders, lead times are approximately
eight weeks ARO; for subsequent orders, six weeks ARO or less. For more
information about Littelfuse and our circuit protection products, please
visit the Littelfuse web site at
or contact the Littelfuse Technical Support line at 1-800-999-9445
Click here for 477 series fuse product specifications
protection application design ideas, please visit the new
Application Design Center
section of the Littelfuse web site.
If you have questions or require technical support please contact
the Littelfuse technical support hotline at 1-800-999-9445.
As the worldwide leader in circuit protection products
and solutions with annual sales of $536.1 million in 2007, the Littelfuse
portfolio is backed by industry leading technical support, design and
manufacturing expertise. Littelfuse products are vital components in
virtually every product that uses electrical energy, including automobiles,
computers, consumer electronics, handheld devices, industrial equipment,
and telecom/datacom circuits. Littelfuse offers Teccor®, Wickmann® and
Pudenz® brand circuit protection products. In addition to its Des Plaines,
Illinois, world headquarters, Littelfuse has sales, distribution, manufacturing
and engineering facilities in Brazil, China, England, Germany, Hong
Kong, India, Ireland, Japan, Korea, Mexico, the Netherlands, the Philippines,
Singapore, Taiwan and the U.S.
For more information, please
visit Littelfuse's web site at
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