Littelfuse 481 Series - Manual (Page 2)

© 2013 Littelfuse, Inc.
Specifi cations are subject to change without notice.
Revised: 10/16/13
Special Application Fuses
481 Series Alarm Indicating Fuse
Average Time Current Curves
1000
100
10
1
0.1
0.01
1000 100 10 1 0.1
1
8/1
0
0
A
1/4 A 1/2 A 65/1
0
0
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
20 A
TIME IN SECONDS
CURRENT IN AMPERES
Material
Body: Polyphenylene Sulfi de (UL 94VO)
Terminations: Beryllium Copper/Tin Plated
Optional Lens: Nylon
Vibration Per MIL-STD-202F
Product Characteristics Product Characteristics
Dimensions
Part Numbering System
*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.
22.9 mm
(.90") MIN.
5.8 mm
(.23")
5.3 mm
(.21")
16.9 mm
(.665") MAX.
11.7 mm
(.46")
17.8 mm (.70")
19.6 mm
(.77")
21.3 mm
(0.84")
REF.
LENS
2.77
(.109")
2.79
(.110")
4.45
(.175")
1-15A 20A*
Operating Temperature – 55 O C to 125 O C.
Thermal Shock
Withstands 5 cycles of – 55 O C to
125 O C
Insulation Resistance
(After Opening)
Greater than 10,000 ohms.
OPTION CODE:
RoHS ITEM OPTION CODE:
SERIES
AMP CODE
QUANTITY CODE:
Blank = Standard
XL = Protective Lens
Blank = Standard design item
P = RoHS compliant version item
(available in 2-20 amp range only)
0481 .180 H XL P
V = 5 pack
H = 100 pack
(See Electrical Characteristics Table)