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466 Series Fuse
Surface Mount Fuses
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
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.
Features
Agency Approvals
AGENCY AGENCY FILE NUMBER AMPERE RANGE
E10480 125mA - 5A
LR29862 125mA - 5A
Electrical Characteristics for Series
% of Ampere
Rating
100% 4 hours, Minimum
200% 5 sec., Maximum
300% 0.2 sec., Maximum
Opening Time at 25
O
C
Additional Information
Datasheet
Resources
Samples
Electrical Specifications by Item
• Productiscompatible
with lead-free solders
and higher temperature
profiles
• Productismarkedon
top surface with code to
allow amperage rating
identification without
testing
• Lowproleforheight
sensitive applications
• Flattopsurfaceforpick-
and-place operations
• Element-coveringmaterial
is resistant to industry
standard cleaning
operations
• Mountingpadand
electrical performance are
identical to Littelfuse 429
and 433 Series products
• Alloy-basedelement
construction provides
superior inrush withstand
characteristics (I
2
t) over
ceramic or glass-based
1206 chip fuse products
Applications
Secondary protection for space constrained applications:
• Cellphones
• Batterypacks
• DVDplayers
• Harddiskdrives
• Digitalcameras
Ampere
Rating
(A)
0.125 .125 125
0.200 .200 125 1.160 0.00055 254.28 0.0509 x x
0.250 .250 125 0.710 0. 0 010 207.01 0.0518 x x
0.375 .375 125 0.350 0.0028 169.18 0.0634 x x
0.500 .500 63
0.750 .750 63 0.111 0.0276 98.65 0.0740 x x
1. 0 0 0 01. 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
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
1. Measured at 10% of rated current, 25ºC.
2. Measured at rated voltage.
Amp
Code
Max
Voltage Rating
(V)
Interrupting
Rating
50A @125 V AC/
DC
50A @63 V AC/DC
50A @32 V AC/DC
Nominal Cold
Resistance
(Ohms)
4.000 0.00040 552.66 0.0691 x x
0.248 0.0060 158.47 0.0792 x x
0.024 0.3516 76.99 0.1925 x x
Nominal
Melting
2
t (A2sec)
I
Nom
Voltage Drop
(mV)
Nom Power
Dissipation
(W)
Specifications are subject to change without notice.
Agency Approvals
© 2013 Littelfuse, Inc.
Revised: 12/19/13
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Surface Mount Fuses
TIME IN SECONDS
CURRENT IN AMPERES
100
A
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
Temperature Rerating Curve
Note:
1. Rerating depicted in this curve is in addition to the standard rerating 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
2. The temperature derating curve represents the nominal conditions. For questions
about temperature derating curve, please consult Littelfuse technical support for
assistance.
= (0.60)I
RAT
RAT
Average Time Current Curves
1/2A
100
0.01
0.001
3/8A
1/4A
1/8A
10
1
0.1
0.1
3/4A
1
1A
5A
4A
3A
2 1/2A2A
1 3/4A1 1/2A1 1/4
10
Soldering Parameters
Reflow Condition Pb – free assembly
- Temperature Min (T
Pre Heat
- Temperature Max (T
- Time (Min to Max) (ts) 60 – 180 seconds
Average Ramp-up Rate (Liquidus Temp
(T
) to peak)
L
to TL - Ramp-up Rate 5°C/second max.
T
S(max)
Reflow
- Temperature (TL) (Liquidus) 217°C
- Temperature (tL) 60 – 150 seconds
Peak Temperature (TP) 260
Time within 5°C of actual peak
Temperature (t
)
p
Ramp-down Rate 5°C/second max.
Time 25°C to peak Temperature (T
Do not exceed 260°C
Wave Soldering 260°C, 10 seconds max.
) 150°C
s(min)
) 200°C
s(max)
5°C/second max.
+0/-5
°C
20 – 40 seconds
) 8 minutes max.
P
Temperature
T
T
T
T
S(max)
S(min)
25
P
L
time to peak temperature
(t 25ºC to peak)
Preheat
t
S
Ramp-up
t
P
Critical Zone
T
to T
L
P
t
L
Ramp-down
Time
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Page 3
Surface Mount Fuses
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
Product Characteristics
Body: Advanced High Temperature Substrate
Materials
Terminations: 100% Tin over Nickel over
Copper
Element Cover Coat: Conformal Coating
Operating
Temperature
O
C to 90OC.
– 55
Consult temperature rerating curve chart.
Thermal Shock Withstands 5 cycles of –55OC to 125OC
Humidity MIL-STD-202F, Method 103B, Condition D
Vibration Per MIL-STD-202F, Method 201A
Insulation
Resistance
Greater than 10,000 ohms
(After Opening)
Resistance to
Soldering Heat
MIL-STD-202G, Method 210F, Condition D
Part Marking System
Amp
Code
.125 B
.200 C
.250 D
.375 E
.500 F
.750 G
0 01. H
1.25 J
01.5 K
1.75 L
002. N
02.5 O
003. P
004. S
005. T
Marking
Code
Dimensions
MARKING CODE VARIES
WITH AMPERAGE RATING
(SEE CHART)
Sn
3.175 ± 0.127
(0.125" ± 0.005")
Cu
3.175 ± 0.127
(0.125" ± 0.005")
1.65
(.065")
1.52
(.060")
2.03
(.080")
WAVE SOLDER REFLOW SOLDER
Sn
(.190")
4.83
Sn
1.524 ± 0.127
(0.060" ± 0.005")
0.559 ± 0.127
(0.022" ± 0.005")
Part Numbering System
0466002.NRHF
SERIES
AMP Code
Refer to Amp Code column in the
Electrical Specifications table.
The dot is poisitioned before the Packaging Suffix with whole ratings and
within the numbering sequence for
fractional ratings.
N = 5000 pcs
PACKAGING Code
R = Tape and Reel
‘HF’ SUFFIX
HALOGEN FREE ITEM
0.660 ± 0.127
(0.026" ± 0.005")
Coating
3.81
(.150")
2.03
(.080")
.125 amp product is
0466.NR HF
(2 amp product shown
above).
0.584 ± 0.076
(0.023" ± 0.003")
1.52
(.060")
1.14
(.045")
Packaging
Packaging Option Packaging Specification Quantity
8mm Tape and Reel EIA-481 Rev. D (IEC 60286, part 3) 5000 NR
Packaging Code
Quantity &
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 12/19/13
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