Page 685 - V16 Catalogue Final

FUSE LINK TEMPERATURE DERATING

FUSE DE-RATING WITH HIGH ENCLOSURE TEMPERATURES

TECHNICAL
In accordance with the relevant Standards, the rated current of fuses is determined by tests RESOURCES
conducted at 35°C ambient air temperature. When fuses are installed within enclosures, it is
the temperature within the enclosure (fluid enviroment temperature) which determines whether
de-rating is necessary. The effect of high enclosure temperatures on IPD Type T fuses is indicated
by the table below.

Maximum Load Current (A)
Fuse Nominal Versus Fluid Environment Temperature
Rating (A)
55°C 60°C 65°C 70°C 75°C
63 or less
80 75 70
100 De-rating not 95 90
necessary
125 120 110
160 145 135
200 190 180 170
250 235 225 210
315 300 285 270 255
355 350 330 315 295
400 390 380 360 340
450 425 405 380 360
500 475 450 425 400 380
560 540 520 495 465 440
630 600 570 540 510 480
670 650 615 585 550 520
710 700 665 630 595 560
750 725 710 670 630 590
800 760 720 680 640 600
1000 950 900 850 800 750
1250 1140 1070 1020 960 900

Phone: 1300 556 601 www.ipd.com.au V16-TR-R03 677