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ECA IS-722 Document Information:
Title
Low-Voltage Supplemental Fuse Qualification Specification
Electronic Components Association
Publication Date:
May 1, 1997
Scope:
Description
This specification defines the qualification program for low
voltage, supplemental fuses. Fuses covered will be limited to
axial-leaded, radial-leaded and surface mount configurations having
a current rating of no greater than 60 A, maximum voltage rating of
600 VAC/DC and interrupting rating of 10,000 A maximum. The
qualification program is defined in table 1, and the flow diagram.
Specification sheets can be added, as required, to define specific
products or to cover unique / specific requirements. This document
does not relieve the suppliers of their responsibility to maintain
their own company's internal qualification program and the fuses
shall continue to meet all applicable requirements of UL 248-14 /
CSA-C22.2 NO. 248.14.
Three types of fuses are covered in this specification. They
include:
Type I - The type I fuse is designed to operate (open) within a
given time period at 200% overload. The remainder of this
specification is written with the 200% overload test used as the
standard.
Type II - The type II fuse is designed to operate (open) within
a given time period at 250% overload. For a Type II fuse, the 250%
overload shall be substituted throughout this specification where
200% overload is noted. All other requirements shall continue to be
met.
Type III - The type III fuse is designed to operate (open)
within a given time period at 300% overload. For a Type III fuse,
the 300% overload shall be substituted throughout this
specification where 200% overload is noted. All other requirements
shall continue to be met.
Preconditioning
This process is intended to simulate exposure to the thermal and
cleaning environments of the assembly process before qualification
testing. The component assembly process simulation requirements for
different types of processes are described in annex A.
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