Littelfuse FK3 80V User Manual
Blade Fuses
FK3 MA XI® STYLE BLADE FUSE RATED 80V
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
Ordering Information
Part Number Package Size
166.6885.5xx2 1000
166.6885.5xx1 10
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.
Pre-Arcing Time-Limits
FI = 1.43 (max. operating
current : 0.7 x I
at 23°C)
rat
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
Dimensions
Dimensions in mm
Ratings
Part Number Current Rating Housing Color Typ. Voltage Drop Cold Resistance I2t
166.6885.520_ 20 A 120 mV 4.50 mΩ 2,160 A²s
166.6885.530_ 30 A
166.6885.540_ 40 A
166.6885.550_ 50 A
Corresponding holder see Section “Fuse Holders.”
160 mV 3.00 mΩ 4,950 A²s
110 mV 1.65 mΩ 12,800 A²s
100 mV 1.20 mΩ 25,500 A²s
© 2012 Littelfuse • Transportation Products Catalogwww.littelfuse.com
Loading...