Surface Mount Fuses
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
466 Series 1206 Fast-Acting Fuse
Description
RoHS
Pb
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.
Features
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
29862
AMPERE RANGE
0.125A - 5A
0.125A - 5A
• 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
• Lead-free, Halogen-free
and RoHS compliant
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
300%
Opening Time at 25
O
C
4 hours, Minimum
5 sec., Maximum
0.2 sec., Maximum
Applications
Additional Information
Secondary protection for space constrained applications:
• Cell phones
• Battery packs
Datasheet
Resources
Samples
• DVD players
• Hard disk drives
• Digital cameras
Electrical Specifications by Item
Ampere
Rating
(A)
0.125
0.200
0.250
0.375
0.500
0.750
1.00
1.25
1.50
1.75
2.00
2.50
3.00
4.00
5.00
Amp
Code
.125
.200
.250
.375
.500
.750
001.
1.25
01.5
1.75
002.
02.5
003.
004.
005.
Max
Nominal Cold
Interrupting
Voltage Rating
Resistance
Rating
(V)
(Ohms)
125
3.925
125
1.100
50A @125 V AC/
DC
125
0.691
125
0.351
63
0.248
63
0.106
63
0.075
50A @63 V AC/DC
63
0.057
63
0.046
63
0.038
63
0.030
32
0.023
32
0.019
50A @32 V AC/DC
32
0.014
32
0.011
Nominal
Melting
I
2
t (A
2
sec)
0.00064
0.00055
0.0022
0.0045
0.0060
0.0276
0.0423
0.0640
0.1103
0.1835
0.2326
0.3516
0.5760
1.764
2.500
Nom
Nom Power Agency Approvals
Voltage Drop Dissipation
(mV)
(W)
634.37
0.0793
x
x
254.28
0.0509
x
x
207
.01
0.0518
x
x
169.18
0.0634
x
x
158.47
0.0792
x
x
98.65
0.0740
x
x
79.97
0.0800
x
x
85.71
0.1071
x
x
82.97
0.1244
x
x
80.73
0.1413
x
x
78.73
0.1575
x
x
76.99
0.1925
x
x
75.99
0.2280
x
x
74.50
0.2980
x
x
73.75
0.3688
x
x
1. Measured at 10% of rated current, 25ºC.
2. Measured at rated voltage.
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice. Application testing is strongly recommended.
Revised: 10/10/16
Surface Mount Fuses
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
Temperature Re-rating Curve
Average Time Current Curves
1 1/4A
1 1/2A
1 3/4A
1/4A
3/8A
1/2A
1/8A
3/4A
2A
2 1/2A
3A
4A
5A
10
100
10
TIME IN SECONDS
1
0.1
Note:
1. Re-rating depicted in this curve is in addition to the standard re-rating of 25% for
continuous operation.
Example:
For continuous operation at 70 degrees celsius, the fuse should be rerated as follows:
I = (0.75)(0.80)I
RAT
= (0.60)I
RAT
2. The temperature derating curve represents the nominal conditions. For questions
about temperature derating curve, please consult Littelfuse technical support for
assistance.
0.001
0.1
1
100
CURRENT IN AMPERES
0.01
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (Min to Max) (t
s
)
Average Ramp-up Rate (Liquidus Temp
(T
L
) to peak)
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Temperature (t
L
)
Pb – free assembly
150°C
60 – 180 seconds
5°C/second max.
5°C/second max.
217°C
60 – 150 seconds
260
+0/-5
°C
20 – 40 seconds
5°C/second max.
8 minutes max.
260°C
1A
T
P
T
L
Temperature
t
P
Ramp-up
Critical Zone
T
L
to T
P
200°C
T
S(max)
T
S(min)
Preheat
t
L
Ramp-down
t
S
time to peak temperature
(t 25ºC to peak)
25
Time
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Wave Soldering
260°C, 10 seconds max.
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/10/16
Surface Mount Fuses
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
Product Characteristics
Body:
Advanced High Temperature Substrate
Terminations:
100% Tin over Nickel over
Copper
Element Cover Coat:
Conformal Coating
– 55
O
C to 90
O
C.
Consult temperature re-rating curve chart.
Withstands 5 cycles of –55
O
C to 125
O
C
MIL-STD-202, Method 103, Condition D
MIL-STD-202, Method 201
Greater than 10,000 ohms
MIL-STD-202, Method 210,
Condition D
Dimensions
MARKING CODE VARIES
WITH AMPERAGE RATING
(SEE CHART)
0.660 ± 0.127
(0.026" ± 0.005")
Sn
0.584 ± 0.076
(0.023" ± 0.003")
0.559 ± 0.127
(0.022" ± 0.005")
Sn
Sn
Coating
Materials
Operating
Temperature
Thermal Shock
Humidity
Vibration
Insulation
Resistance
(After Opening)
Resistance to
Soldering Heat
3.175 ± 0.127
(0.125" ± 0.005")
Cu
1.524 ± 0.127
(0.060" ± 0.005")
3.175 ± 0.127
(0.125" ± 0.005")
1.65
(.065")
1.52
(.060")
4.83
(.190")
Part Marking System
Amp
Code
.125
.200
.250
.375
.500
.750
001.
1.25
01.5
1.75
002.
02.5
003.
004.
005.
Marking
Code
B
C
D
E
F
G
H
J
K
L
N
O
P
S
T
3.81
(.150")
1.52
(.060")
1.14
(.045")
2.03
(.080")
WAVE SOLDER
REFLOW SOLDER
2.03
(.080")
Part Numbering System
0466002.NRHF
SERIES
AMP Code
Refer to Amp Code column in the
Electrical Specifications table.
The dot is poisitioned before the Pack-
aging Suffix with whole ratings and
within the numbering sequence for
fractional ratings.
N = 5000 pcs
.125 amp product is
0466.125NRHF
(2 amp product shown
above).
PACKAGING Code
R = Tape and Reel
‘HF’ SUFFIX
HALOGEN FREE ITEM
Packaging
Packaging Option
8mm Tape and Reel
Packaging Specification
EIA-481 Rev. D (IEC 60286, part 3)
Quantity
5000
Quantity &
Packaging Code
NR
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/10/16
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