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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Special Application Fuses
481 Series Alarm Indicating Fuse
481 Series Alarm Indicating Fuse
Description
Agency Approvals
Agency Agency File Number
E71611 0.080A - 20A
29862 0.080A - 20A
Electrical Characteristics
Features
• Color-coded indicator
flags indicate ampere
rating.
• Clear plastic lens option
available for additional
safety.
• RoHS compliant
• Body is constructed of
black plolyphenylene
sulfide with UL-94V0
flammability rating.
• Contacts made of bright
alloy-plated beryillium
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
40A @ 175 VDC
Yellow 6.25 0.0400 x x
0.200* .200 Red/Black 5.70 0.0576 x x
0.250* .250 Violet 4.20 0.0625 x x
0.375* .375 Gray/White 2.00 0.230 x x
0.500* .500 Red 1.52 0.490 x x
0.650* .650
450A @ 60 VDC
300A @ 125 VAC
(up to 20A)
300A @ 125 VDC
(up to 15A)
200A @ 125 VDC
(up to 20A)
460A @ 60 VDC
(up to 15A)
Black 1.25 0.723 x x
0.750* .750 Brown .980 1.32 x x
1.00* 0 01. Gray .665 1.82 x x
1.33* 1.33 White .480 3.13 x x
1.50* 01. 5 Yellow/White .385 2.55 x x
2.00 002. Orange .120 10.2 x x
2.50 02.5 Orange/White 0.093 16.0 x x
3.00 003. Blue .0670 25.0 x x
3.50 03.5 Blue/White .0415 10.5 x x
4.00 004. Brown/White .0350 36.0 x x
5.00 005. Green .0285 64.0 x x
7.50 07.5 White/Black .0113 121.0 x x
10.0 010. White/Red .00840 380.3 x x
12.0 012. Yellow/Green .00660 571.2 x x
15.0 015. Blue/Red .00580 900.0 x x
20.0** 020. White/Green .00394 1024.0 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.
RoHS
Specifications are subject to change without notice. Application testing is strongly recommended.
Additional Information
Datasheet
Samples
Resources