10FC Datasheet, PDF (1/7 Pages) List of Unclassifed Manufacturers – BRITISH STYLE–SEMICONDUCTOR PROTECTION FUSES

BRITISH STYLE–
SEMICONDUCTOR PROTECTION FUSES
The Edison British Style semiconductor protection fuses
include a 660VAC line utilizing new filler technology. These
new fuses have greatly reduced peak let-through current
and energy under fault conditions and hence extend fuse
protection capability. They can be recognized by the letter
“F” in their catalog number. Application and technical data
for these 660VAC “F” fuses and the original line of 240VAC
British “T” type fuses are presented on the following pages.
“F” Range
This is a superior design of fuses in the same physical
package as the “T” range.
Equivalent Ratings
This table shows the suggested equivalent ratings to
replace a “T” with an “F”.
Because of the new design technology it has been possible
to obtain the equivalent energy let-through I²t with a higher
amp rated fuse hence reducing the possibility of premature
operation.
This table gives a range of suggested acceptable new “F”
type to replace the earlier “T” type.
To upgrade your protection to the new “F” series select a
fuse rating within the range shown that suits your circuit
inrush requirements. You will still have the same or better
protection of your semiconductor devices.
It should be remembered that to protect devices we must
consider the energy let-through of the selected fuse. The
label amp rating will relate to the full load current and the
circuit inrush amps.
The suggested replacements are based on:
a. Similar surge withstand to normal circuit overloads.
b. Lower total I²t let-through.
This gives enhanced reliability due to the use of a higher
current rated fuse which avoids nuisance operation and still
gives improved short-circuit protection.
Replacement Table — “T” to “F” (660V)
New “F” Range
Earlier
“T” Range
Lowest
Rating
Highest
Rating
6CT
6FC
6FC
10CT
10FC
10FC
12CT
12FC
12FC
16CT
16FC
16FC
20CT
20FC
20FC
25ET
–
32ET
35FE
35ET
35FE
40ET
40FE
45ET
45FE
56ET
63FE
63ET
63FE
–
–
–
–
80ET
80FE
–
35FE
40FE
45FE
50FE
63FE
71FE
80FE
90FE
100FE
65EET
75EET
90EET
110EET
–
140EET
–
160EET
–
–
–
–
–
140FEE
–
160FEE
–
–
100FEE
120FEE
140FEE
160FEE
180FEE
200FEE
–
160MT
180MT
200MT
–
250MT
280MT
315MT
355MT
–
200FM
225FM
250FM
280FM
315FM
350FM
350FM
350MT
180FM
200FM
225FM
250FM
280FM
315FM
350FM
350FM
350FM
180MMT
200MMT
225MMT
280MMT
315MMT
355MMT
180FM
200FM
225FM
280FM
315FM
350FM
180FM
200FM
225FM
280FM
315FM
350FM
–
–
400MMT
450MMT
500MMT
560MMT
630MMT
710MMT
–
–
500FMM
550FMM
630FMM
700FMM
700FMM
700FMM
400FMM
450FMM
500FMM
550FMM
630FMM
700FMM
700FMM
700FMM
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