Blade Fuses FK3 MAXI® STYLE BLADE FUSE RATED 32V Specifications Insulating Body: Cover: Terminals: Interrupting Rating: Complies with: Out of thermoplastic (UL 94-V0, heat-resistant) Out of thermoplastic (UL 94-V0, heat-resistant) Visible melting-element Blade contacts Copper alloy, gal. Sn Edge-protected 1000 A @32 VDC SAE J 1888 ISO 8820-3:2002(E) UL 248 Special Purpose Fuses Ordering Information Part Number Description The FK3 32V automotive standard fuse link in MAXI size. Three part construction with copper contacts for excellent reliability in harsh environment conditions with low voltage drop. Current ratings 20A thru 100A. With see-through cover for easy detection of blown fuses. Package Size 169.6885.xxx2 1000 169.6885.xxx1 10 ® Time-Current Characteristics % of Rating Opening Time Min / Max (s) 100 360,000 s / - 135 60 s / 1,800 s 200 2 s / 60 s 350 0.20 s / 7 s 600 0.040 s / 1 s Ratings Typ. Voltage Drop Littelfuse max. Cold Resistance I2t 20 A 95 mV 3.80 mΩ 1,900 A²s 2,300 A²s Part Number Current Rating 169.6885.520_ Housing Color 169.6885.525_ 25 A* 100 mV 2.80 mΩ 169.6885.530_ 30 A 80 mV 2.10 mΩ 6,000 A²s 169.6885.535_ 35 A* 100 mV 1.70 mΩ 8,400 A²s 169.6885.540_ 40 A 85 mV 1.60 mΩ 12,000 A²s 169.6885.550_ 50 A 80 mV 1.20 mΩ 26,000 A²s 169.6885.560_ 60 A 85 mV 0.90 mΩ 45,000 A²s 169.6885.570_ 70 A 90 mV 0.80 mΩ 70,000 A²s 169.6885.580_ 80 A 75 mV 0.72 mΩ 94,000 A²s 169.6885.610_ 100 A* 95 mV 0.50 mΩ 140,000 A²s * Not mentioned in the standards Corresponding holder see Section “Fuse Holders.” www.littelfuse.com © 2012 Littelfuse • Transportation Products Catalog Blade Fuses FK3 MAXI® STYLE BLADE FUSE RATED 32V Dimensions Pre-Arcing Time-Limits Dimensions in mm FI = 1.33 (max. operating current: 0.75 x Irat at 23°C) © 2012 Littelfuse • Transportation Products Catalog www.littelfuse.com