TeleLink Fuse
Temperature Derating Curve
Operating temperature is -55 °C to +125 °C with proper correction factor applied.
150
140
130
120
110
100
90
80
70
60
Effect on
50
Current Rating
40
30
-55 -60 -40 -20 0 20 40 60 80 100 125
Ambient ˚C
Chart of Correction Factor
Maximum Temperature Rise
TeleLink Fuse
F0500T
F1250T
F1251T
Temperature Reading
£75 °C (167 °F) *
£75 °C (167 °F) *
£75 °C (167 °F) *
* Higher currents and PCB layout designs can affect this parameter.
Notes:
• Readings are measured at rated current after temperature stabilizes
• The F1250T meets the requirements of UL 248-14. However, board layout, board trace widths, and ambient
temperature values can cause higher than expected rises in temperature. During UL testing, the typical
recorded heat rise for the F1250T at 2.2 A was 120 °C.
Package Symbolization
Marking
FU
FT
JU
JT
NU
NT
F0500T
F
F
F1250T
J
J
F1251T
N
N
Manufactured in
USA
U
U
U
Manufactured in
Taiwan
T
T
T
© 2002 Teccor Electronics
SIDACtor® Data Book and Design Guide
2 - 69
http://www.teccor.com
+1 972-580-7777