Littelfuse FK3 80V Series - Manual

© 2012 Littelfuse • Transportation Products Catalog www.littelfuse.com
FK3 MAXI ® STYLE BLADE FUSE RATED 80V
Description
The FK3-80 is a MAXI ® style fuse rated at 80V, featuring three
piece design with copper contacts for excellent reliability in harsh
environment conditions and low voltage drop. Current ratings 20A
thru 50A. Filled with arc-quenching material.
Specifications
Insulating Body: Out of thermoplastic (UL 94-V0, heat-resistant)
Cover: Out of thermoplastic (UL 94-V0, heat-resistant)
Red, not transparent
Terminals: Blade contacts
Copper alloy, gal. Sn
Edge-protected
Interrupting Rating: 1000 A @80 VDC
Complies with: UL 248 Special Purpose Fuses
cULus Recognized: File No. E10480
Time-Current Characteristics
% of Rating Opening Time Min / Max (s)
100 360,000 s / –
135 – / 1,800 s
200 2 s / 60 s
350 0.20 s / 7 s
600 0.040 s / 1 s
Ordering Information
Part Number Package Size
166.6885.5xx2 1000
166.6885.5xx1 10
Corresponding holder see Section “Fuse Holders.”
Ratings
Part Number Current Rating Housing Color Typ. Voltage Drop Cold Resistance I 2 t
166.6885.520_ 20 A 120 mV 4.50 mΩ 2,160 A²s
166.6885.530_ 30 A 160 mV 3.00 mΩ 4,950 A²s
166.6885.540_ 40 A 110 mV 1.65 mΩ 12,800 A²s
166.6885.550_ 50 A 100 mV 1.20 mΩ 25,500 A²s
FI = 1.43 (max. operating
current : 0.7 x I
rat
at 23°C)
Pre-Arcing Time-Limits
Dimensions
Dimensions in mm
Blade Fuses