Surface Mount Fuses
Ceramic Fuse > 441 Series
441 Series – 0603 High I
2
t Fuse
Description
This 100% Lead-free, RoHS compliant and Halogen-free
fuse series has been designed specifically to provide over
current protection to circuits that see high working ambient
temperatures (up to 150ºC) and high inrush currents.
The general design ensures excellent temperature stability
and performance reliability.
This high I²t fuse series is designed to have ultra high inrush
current withstand capability to avoid nuisance fuse open.
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
Pending
AMPERE RANGE
2A - 6A
2A - 6A
Features
from -55ºC to 150ºC
RoHS compliant
and lead-free reflow /
wave soldering
Electrical Characteristics
% of Ampere
Rating
100%
350%
Ampere Rating
2A - 6A
2A - 6A
Opening Time at 25ºC
4 Hours Minimum
5 Seconds Maximum
Applications
Electrical Specifications by Item
Ampere
Rating
(A)
2
2.5
3
3.5
4
5
6
Notes:
1. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msecs.
2. Nominal Resistance measured with < 10% rated current.
3. Nominal Melting I²t measured at 1 msec. opening time.
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.
Devices designed to carry out rated current for 4 hours minimum. It is recommended that
devices be operated continuously at no more than 80% rated current. See “Temperature
Rerating Curve”for additional rerating information.
Devices designed to be mounted with marking code facing up.
Amp Max. Voltage
Code
Rating (V)
002.
02.5
003.
03.5
004.
005.
006.
32
32
32
32
32
32
32
Interrupting
Rating
Nominal
Nominal
Resistance Melting I
2
t
(A
2
Sec.)
3
(Ohms)
2
0.0320
0.0200
0.0158
0.3103
0.5520
0.8165
0.9438
1.2659
1.6287
2.6049
Nominal Voltage
Drop At Rated
Current (V)
4
0.0551
0.0534
0.0531
0.0468
0.0475
0.0472
0.0464
Nominal Power Agency Approvals
Dissipation At
Rated Current (W)
0.110
0.134
0.159
0.164
0.190
0.236
0.278
X
X
X
X
X
X
X
50 A @ 32 VDC
0.0117
0.0097
0.0073
0.0056
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/441.html for current information.
1
Revised: May 17, 2010
441 Series
441 Series
Surface Mount Fuses
Introduction to Circuit Protection
Transientology
Ceramic Fuse > 441 Series
Temperature Rerating Curve
Average Time Current Curves
2.5A
3A
3.5A
4A
5A
6A
10
CURRENT IN AMPERES
140
100
PERCENT OF RATING
120
10
100
80
TIME IN SECONDS
1
60
40
-65
-45
-25
-5
15
35
55
75
95
115
135
155
TEMPERATURE (°C)
0.1
Note:
1. Rerating depicted in this curve is in addition to the standard rerating of 20% for
continuous operation.
For continuous operation at 75 degrees celsius, the fuse should be rerated as follows:
I = (0.80)(0.85)I
RAT
= (0.68)I
RAT
0.001
1
100
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
)
260
+0/-5
°C
3°C/second max.
5°C/second max.
217°C
150°C
2A
T
P
Ramp-up
t
P
Critical Zone
T
L
to T
P
Temperature
200°C
T
L
T
S(max)
Preheat
t
L
Ramp-down
T
S(min)
t
S
25
time to peak temperature
(t 25ºC to peak)
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
6°C/second max.
8 minutes max.
260°C
Wave Soldering
260°C, 10 seconds max.
441 Series
2
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/441.html for current information.
Surface Mount Fuses
Ceramic Fuse > 441 Series
Product Characteristics
Body:
Advanced Ceramic
Terminations:
Ag / Ni / Sn (100% Lead-free)
Element Cover Coating:
Lead-free Glass
Moisture Resistance
Thermal Shock
Mechanical Shock
Vibration
Vibration,
High Frequency
Dissolution of
Metallization
Terminal Strength
MIL
-STD-202, Method 106G
MIL
-STD-202, Method 107G,
Materials
Moisture
Sensitivity Level
Solderability
Humidity
ESD Immunity
Resistance to
Solder Heat
Condition A
MIL
-STD-202, Method 201A
MIL
-STD-202, Method 204D,
Condition D
Condition D
Dimensions
Part Marking System
Amp Code
Marking Code
N
O
P
R
S
T
U
0.530 +/- 0.150
[0.021 +/- 0.006]
1.54 +/- 0.150
[0.061 +/- 0.006]
002.
02.5
003.
03.5
004.
005.
006.
0.850 +/- 0.150
[0.033 +/- 0.006]
0.502 +/- 0.080
[0.020 +/- 0.003]
Part Numbering System
0441 005. W R
SERIES
PACKING CODE
0.432 +/- 0.150
[0.017 +/- 0.006]
AMP CODE
QUANTITY CODE
0.74
[0.029]
0.60
[0.024]
W = 3000 pcs
1.00
[0.039]
1.94
[0.076]
Packaging
Packaging Option
8mm Tape and Reel
Packaging Specification
Quantity
3000
Quantity &
Packaging Code
WR
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/441.html for current information.
3
441 Series
441 Series
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