Littelfuse 466 Series User Manual
Surface mount fuses, 466 series fuse
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Surface Mount Fuses
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
466 Series Fuse
Description
The 466 Series Fast-Acting Surface Mount Fuse (SMF)
is a small (1206 size) thin-film device designed for
secondary protection of circuits used in space constrained
applications such as hand-held portable electronic devices.
This series is 100% lead-free and meets the requirements
of the RoHS directive. New Halogen-Free 466 Series
fuses are available to order using the “HF” suffix. See Part
Numbering section for additional information.
Agency Approvals
AgeNCy
AgeNCy FIle NumbeR
AmpeRe RANge
e10480
125mA - 5A
lR29862
125mA - 5A
Features
Electrical Characteristics for Series
• Product is compatible
with lead-free solders
and higher temperature
profiles
• Product is marked on
top surface with code to
allow amperage rating
identification without
testing
• Low profile for height
sensitive applications
• Flat top surface for pick-
and-place operations
• Element-covering material
is resistant to industry
standard cleaning
operations
• Mounting pad and
electrical performance are
identical to Littelfuse 429
and 433 Series products
• Alloy-based element
construction provides
superior inrush withstand
characteristics (I
2
t) over
ceramic or glass-based
1206 chip fuse products
% of Ampere
Rating
Opening Time at 25
O
C
100%
4 hours, Minimum
200%
5 sec., Maximum
300%
0.2 sec., Maximum
Applications
Ampere
Rating
(A)
Amp
Code
max
Voltage Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
melting
I
2
t (A
2
sec)
Nom
Voltage Drop
(mV)
Nom power
Dissipation
(W)
Agency Approvals
0.125
.125
125
50A @125 V AC/
DC
4.000
0.00040
552.66
0.0691
x
x
0.200
.200
125
1.160
0.00055
254.28
0.0509
x
x
0.250
.250
125
0.710
0.0010
207.01
0.0518
x
x
0.375
.375
125
0.350
0.0028
169.18
0.0634
x
x
0.500
.500
63
50A @63 V AC/DC
0.248
0.0060
158.47
0.0792
x
x
0.750
.750
63
0.111
0.0276
98.65
0.0740
x
x
1.00
001.
63
0.076
0.0423
89.94
0.0899
x
x
1.25
1.25
63
0.059
0.0640
85.71
0.1071
x
x
1.50
01.5
63
0.048
0.1103
82.97
0.1244
x
x
1.75
1.75
63
0.039
0.1323
80.73
0.1413
x
x
2.00
002.
63
0.031
0.2326
78.73
0.1575
x
x
2.50
02.5
32
50A @32 V AC/DC
0.024
0.3516
76.99
0.1925
x
x
3.00
003.
32
0.020
0.5760
75.99
0.2280
x
x
4.00
004.
32
0.014
1.024
74.50
0.2980
x
x
5.00
005.
32
0.011
1.600
73.75
0.3688
x
x
Electrical Specifications by Item
1. Measured at 10% of rated current, 25ºC.
2. Measured at rated voltage.
• Cell phones
• Battery packs
• Digital cameras
• DVD players
• Hard disk drives
Secondary protection for space constrained applications:
Additional Information