© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/30/19
Ceramic Fuse > 440A Series
Surface Mount Fuses
440A Series, 1206 High I2t Fuse
Description
The 440A Series AECQ-Compliant fuses are specifically
tested to cater to secondary circuit protection needs of
compact auto electronics applications.
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 Ampere Range
E10480 0.500A - 8A
29862 0.500A - 8A
Features
Electrical Characteristics for Series
• Operating Temperature
from -55ºC to +150ºC
• 100% Lead-free, RoHS
compliant and Halogen-free
• Meets Littelfuse’s
automotive qualifications*
• Ultra high I2t values
• Fast response to faulty
current to ensure over-
current protection to
sensitive electronic
component
% of Ampere
Rating Ampere Rating Opening Time at 25ºC
100% 0.50A - 0.75A
1.75A - 8A 4 hours, Minimum
350% 0.50A - 0.75A
1.75A - 8A 5 secs., Maximum
Applications
Ampere
Rating
(A)
Amp
Code
Max. Voltage
Rating (V)
Interrupting Rating
(AC/DC)1
Nominal
Resistance
(Ohms)2
Nominal
Melting I2t
(A2Sec.)3
Nominal Voltage
Drop At Rated
Current (V)4
Nominal Power
Dissipation At Rated
Current (W)
Agency Approvals
0.5 .500 63 50A @ 63VAC/DC 0.8140 0.02642 0.4831 0.242 x X
0.75 .750 63 0.4624 0.09312 0.3983 0.299 x X
1.75 1.75 63
50A @ 32VAC/63VDC
0.0450 0.3312 0.0777 0.136 x X
2 002. 63 0.0385 0.4326 0.0792 0.158 x X
2.5 02.5 63 0.02850 0.8191 0.0747 0.187 x X
3 003. 63 0.02252 1.232 0.0742 0.223 x X
3.5 03.5 63 0.01845 1.789 0.0757 0.265 x X
4 004. 63 0.01553 2.601 0.0709 0.284 x X
5 005. 63 0.0120 4.761 0.0654 0.327 x X
70 0 7. 63 0.00753 8.464 0.0696 0.487 x X
8008. 63 0.00634 12.95 0.0655 0.524 x X
Electrical Specifications by Item
Notes:
1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting
Rating tested at rated voltage with time constant < 0.8 msec.
2. Nominal Resistance measured with < 10% rated current.
3. Nominal Melting I²t measured at 1msec. opening time.
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.
RoHS
Pb
• Li-ion Battery
• LED Lighting
• Automotive Navigation
System
• TFT Display
• Battery Management
System (BMS)
• Cluster
Devices designed to carry rated current for 4 hours minimum. It is recommended that
devices be operated continuously at no more than 80% rated current. See “Temperature
Derating Curve”for additional derating information.
Devices designed to be mounted with marking code facing up.
Application testing is strongly recommended.
* - Largely based on Littelfuse internal AEC-Q200 test plan.
Additional Information
Datasheet Samples
Resources
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/30/19
Ceramic Fuse > 440A Series
Surface Mount Fuses
Average Time Current Curves
Reflow Condition Pb-free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (Min to Max) (ts)60 – 180 seconds
Average Ramp-Up Rate (Liquidus Temp (TL)
to peak) 3°C/second max.
TS(max) to TL - Ramp-up Rate 5°C/second max.
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60 – 150 seconds
Peak Temperature (TP)260+0/-5 °C
Time within 5°C of actual peak Temperature
(tp)10 – 30 seconds
Ramp-down Rate 6°C/second max.
Time 25°C to peak Temperature (TP)8 minutes max.
Do not exceed 260°C
Soldering Parameters
Temperature Rerating Curve
40
60
80
100
120
140
-65 -45 -25 -5 15 35 55 75 95 115 135 15 5
TEMPERATURE (°C)
PERCENT OF RATING
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
Example:
For continuous operation at 75 degrees celsius, the fuse should be derated as follows:
I = (0.80)(0.85)IRAT = (0.68)IRAT
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 20% for
continuous operation.
Wave Soldering 260°C, 10 seconds max.
0.001
0.01
0.1
1
10
100
0.1110 100
1000
TIME IN SECONDS
CURRENT IN AMPERES
0.5A
0.75
A
1.75A
2A
2.5A
3A
3.5A
4A
5A
8A
7A
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/30/19
Ceramic Fuse > 440A Series
Surface Mount Fuses
Product Characteristics
Materials
Body: Advanced Ceramic
Terminations: Ag / Ni / Sn (100% Lead-free)
Element Cover Coating: Lead-free Glass
Moisture Sensitivity
Level IPC/JEDEC J-STD-020, Level 1
Solderability IPC/ECA/JEDEC J-STD-002, Condition C
Humidity Test MIL-STD-202, Method 103, Conditions D
Resistance to Solder
Heat MIL-STD-202, Method 210, Condition B
Moisture Resistance MIL-STD-202, Method 106
Thermal Shock MIL-STD-202, Method 107, Condition B
Mechanical Shock MIL-STD-202, Method 213, Condition A
Vibration MIL-STD-202, Method 201
Vibration,
High Frequency MIL-STD-202, Method 204, Condition D
Dissolution of
Metallization IPC/ECA/JEDEC J-STD-002, Condition D
Terminal Strength IEC 60127-4
High Temperature
Storage MIL-STD-202, Method 108 with exemptions
Thermal Shock Test JESD22 Method JA-104,
Test Conditions B and N
Biased Humidity MIL-STD-202, Method 103, 85C/85% RH with
10% operating power for 1000 hrs
Operational Life
MIL-STD-202, Method 108, Test Condition D
Resistance to
Solvents MIL-STD-202, Method 215
Mechanical Shock MIL-STD-202, Method 213, Test Condition C
High Frequency
Vibration MIL-STD-202, Method 204
Resistance to
Soldering Heat MIL-STD-202, Method 210, Test Condition B
Solderability JESD22-B102E Method 1
Terminal Strength
for SMD AEC Q200-006
Board Flex AEC Q200-005
Electrical
Characterization 3 Temperature Electrical
Dimensions
3.200 ± .1778
[.126 ± .007]
1. 000
[.039]
1.500
[.059]
1.800
[.071]
3.500
[.138]
1. 000
[.039]
.835 +/-.015
[.0329 +/-.006]
0.520 ± .200
[.020 ± .008]
TERMINATION
1.63 + .10/ -.20
[.064 + .004/ -.008]
Packaging
Part Marking System
Packaging Option Packaging Specification Quantity Quantity and
Packaging Code
8mm Tape and Reel EIA-481, IEC 60286, Part 3 3000 WRA
Part Numbering System
0440 008. W R A
SERIES
AMP CODE
QUANTITY CODE
W = 3000 pcs
PACKING CODE
AEC-Q200 QUALIFIED
R = Reel Pack
Amp Code Marking Code
0.500 F
0.750 G
1.75 L
002.0 N
02.5 O
003.0 P
03.5 R
004.0 S
005.0 T
007.0 W
008.0 X
