Littelfuse 481 Series - Manual

© 2013 Littelfuse, Inc.
Specifi cations are subject to change without notice.
Revised: 10/16/13
Special Application Fuses
481 Series Alarm Indicating Fuse
481 Series Alarm Indicating Fuse
Description
Agency Approvals
Agency Agency File Number
E71611
LR 29862
Electrical Characteristics
Features
• Color-coded indicator
fl ags indicate ampere
rating.
• Clear plastic lens option
available for additional
safety.
• Body is constructed of
black plolyphenylene
sulfi de with UL-94V0
fl ammability rating.
• Contacts made of bright
alloy-plated beryillioum
copper.
Applications
% of Ampere
Rating
Opening Time
100% 10 Minutes, Minimum
150% 5 Minutes, Maximum
Electrical Characteristics
* 0.180A thru 1.5A items are not available for sale as a RoHS compliant “P” option
**20A Fuseholder must be used. Fuse is keyed to prevent insertion in lower rated holders.
20A Fuseholder is designed to accept all ratings up to 20 amperes.
Ampere
Rating
(A)
Amp
Code
Max
Voltage
Rating
(V)
Interrupting
Rating
Body
Color
Code
Nominal
Cold Resistance
(Ohms)
Nominal Melting
I 2 t (A 2 Sec.)
Agency
Approvals
0.180* .180
125 VAC
&
125 VDC
450A @ 60 VDC
300A @ 125 VAC
(up to 20A)
300A @ 125 VDC
(up to 15A)
200A @ 125 VDC
(up to 20A)
Yellow 6.25 0.00808 x x
0.200* .200 Red/Black 5.70 0.0140 x x
0.250* .250 Violet 4.20 0.0356 x x
0.375* .375 Gray/White 2.00 0.028 x x
0.500* .500 Red 1.52 0.139 x x
0.650* .650 Black 1.25 0.278 x x
0.750* .750 Brown .980 0.363 x x
1.00* 001. Gray .665 0.733 x x
1.33* 1.33 White .480 1.58 x x
1.50* 01.5 Yellow/White .385 2.55 x x
2.00 002. Orange .120 5.29 x x
2.50 02.5 Orange/White .0904 9.46 x x
3.00 003. Blue .0670 11.2 x x
3.50 03.5 Blue/White .0415 10.5 x x
4.00 004. Brown/White .0350 15.4 x x
5.00 005. Green .0285 26.2 x x
7.50 07.5 Black/White .0113 42.8 x x
10.0 010. Red/White .00840 115.3 x x
12.0 012. Green/Yellow .00660 222.5 x x
15.0 015. Red/Blue .00580 294.22 x x
20.0** 020. Green/White .00394 570.0 x x
Ideal for telecommunications and control panel circuits
481 Series alarm indicating fuses are designed to reduce
down time by immediately pinpointing the blown (open)
circuit while triggering an LED or audio alarm. This item
requires 482 Series mating fuse holder.
All ranges of 481 Series fuses are available as our original
design, and the 2-20 amp range is now available as a RoHS
compliant option (use the “P” designator when ordering).
See the part numbering section of this data sheet for related
ordering instructions.