Special Application Fuses
481 Series Alarm Indicating Fuse
481 Series Alarm Indicating Fuse
Description
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.
Agency Approvals
Agency Agency File Number
E71611
LR 29862
Electrical Characteristics
% of Ampere
Rating
100% 10 Minutes, Minimum
150% 5 Minutes, Maximum
Opening Time
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
Ideal for telecommunications and control panel circuits
Electrical Characteristics
Ampere
Rating
(A)
0.180* .180
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
Amp
Code
Max
Voltage
Rating
(V)
125 VAC
&
125 VDC
Interrupting
Rating
450A @ 60 VDC
300A @ 125 VAC
(up to 20A)
300A @ 125 VDC
(up to 15A)
200A @ 125 VDC
(up to 20A)
Body
Color
Code
Yellow 6.25 0.00808 x x
Nominal
Cold Resistance
(Ohms)
Nominal Melting
I 2 t (A 2 Sec.)
Agency
Approvals
* 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.
© 2013 Littelfuse, Inc.
Specifi cations are subject to change without notice.
Revised: 10/16/13
Product CharacteristicsProduct Characteristics
Special Application Fuses
481 Series Alarm Indicating Fuse
Body: Polyphenylene Sulfi de (UL 94VO)
Material
Terminations: Beryllium Copper/Tin Plated
Optional Lens: Nylon
Vibration Per MIL-STD-202F
Dimensions
22.9mm
(.90") MIN.
17.8
mm (.70")
mm
19.6
5.8
(.23")
mm
(.77")
mm
16.9
(.665") MAX.
1-15A 20A*
5.3
(.21")
mm
11. 7
mm
(.46")
*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.
LENS
2.77
(.109")
4.45
(.175")
21.3mm
(0.84")
REF.
2.79
(.110")
Operating Temperature – 55 O C to 125 O C.
Thermal Shock
Insulation Resistance
(After Opening)
Withstands 5 cycles of – 55
125 O C
Greater than 10,000 ohms.
Average Time Current Curves
18/100 A
1/4 A
1/2 A
65/100 A
3/4 A
1 A
1 1/3 A
2 A
3 A
4 A
5 A
7 1/2 A
10 A
12 A
15 A
1000
100
10
TIME IN SECONDS
1
0.1
20 A
O
C to
Part Numbering System
0481 .180 H XL P
RoHS ITEM OPTION CODE:
OPTION CODE:
QUANTITY CODE:
AMP CODE
(See Electrical Characteristics Table)
SERIES
Blank = Standard design item
P = RoHS compliant version item
(available in 2-20 amp range only)
Blank = Standard
XL = Protective Lens
V = 5 pack
H = 100 pack
0.01
CURRENT IN AMPERES
Specifi cations are subject to change without notice.
© 2013 Littelfuse, Inc.
10001001010.1
Revised: 10/16/13
Loading...