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Littelfuse

440A Datasheet Preview

440A Datasheet

Surface Mount Fuses

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Surface Mount Fuses
Ceramic Fuse > 440A Series
440A Series, 1206 High I2t Fuse
RoHS Pb
Agency Approvals
Agency
Agency File Number
E10480
29862
Ampere Range
0.500A - 8A
0.500A - 8A
Electrical Characteristics for Series
% of Ampere
Rating
100%
350%
Ampere Rating
0.50A - 0.75A
1.75A - 8A
0.50A - 0.75A
1.75A - 8A
Opening Time at 25ºC
4 hours, Minimum
5 secs., Maximum
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.
Features
• Operating Temperature • Ultra high I2t values
from -55ºC to +150ºC
• Fast response to faulty
• 100% Lead-free, RoHS
current to ensure over-
compliant and Halogen-free current protection to
• Meets Littelfuse’s
sensitive electronic
automotive qualifications* component
* - Largely based on Littelfuse internal AEC-Q200 test plan.
Applications
• Li-ion Battery
• LED Lighting
• Automotive Navigation
System
Additional Information
• TFT Display
• Battery Management
System (BMS)
• Cluster
Datasheet
Resources
Samples
Electrical Specifications by Item
Ampere
Rating
(A)
Amp Max. Voltage
Code Rating (V)
Interrupting Rating
(AC/DC)1
Nominal
Resistance
(Ohms)2
0.5
0.75
.500
.750
63
63
50A @ 63VAC/DC
0.8140
0.4624
1.75 1.75
63
0.0450
2 002.
63
0.0385
2.5 02.5
63
0.02850
3 003.
63
0.02252
3.5 03.5
63
50A @ 32VAC/63VDC
0.01845
4 004.
63
0.01553
5 005.
63
0.0120
7 007.
63
0.00753
8 008.
63
0.00634
Nominal
Melting I2t
(A2Sec.)3
0.02642
0.09312
0.3312
0.4326
0.8191
1.232
1.789
2.601
4.761
8.464
12.95
Nominal Voltage
Drop At Rated
Current (V)4
Nominal Power
Dissipation At Rated
Current (W)
Agency Approvals
0.4831
0.3983
0.0777
0.0792
0.0747
0.0742
0.0757
0.0709
0.0654
0.0696
0.0655
0.242
0.299
0.136
0.158
0.187
0.223
0.265
0.284
0.327
0.487
0.524
xX
xX
xX
xX
xX
xX
xX
xX
xX
xX
xX
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.
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.
© 2019 Littelfuse, Inc.
Application testing is strongly recommended. Specifications are subject to change without notice.
Revised: 04/30/19




Littelfuse

440A Datasheet Preview

440A Datasheet

Surface Mount Fuses

No Preview Available !

Surface Mount Fuses
Ceramic Fuse > 440A Series
Temperature Rerating Curve
Average Time Current Curves
140
120
100
80
60
40
-65 -45 -25
-5
15 35 55 75 95 115 135 155
TEMPERATURE (°C)
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 20% for
continuous operation.
Example:
For continuous operation at 75 degrees celsius, the fuse should be derated as follows:
I = (0.80)(0.85)IRAT = (0.68)IRAT
Soldering Parameters
Reflow Condition
Pre Heat
- Temperature Min (Ts(min))
- Temperature Max (Ts(max))
- Time (Min to Max) (ts)
Average Ramp-Up Rate (Liquidus Temp (TL)
to peak)
TS(max) to TL - Ramp-up Rate
Reflow
- Temperature (TL) (Liquidus)
- Temperature (tL)
Peak Temperature (TP)
Time within 5°C of actual peak Temperature
(tp)
Ramp-down Rate
Time 25°C to peak Temperature (TP)
Do not exceed
Pb-free assembly
150°C
200°C
60 – 180 seconds
3°C/second max.
5°C/second max.
217°C
60 – 150 seconds
260+0/-5 °C
10 – 30 seconds
6°C/second max.
8 minutes max.
260°C
Wave Soldering
260°C, 10 seconds max.
100
10
1
0.1
0.01
0.001
0.1
1 10 100
CURRENT IN AMPERES
1000
TP
TL
TS(max)
Ramp-up
TS(min)
25
Preheat
tS
time to peak temperature
(t 25ºC to peak)
tP
Critical Zone
TL to TP
tL
Ramp-down
Time
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/30/19


Part Number 440A
Description Surface Mount Fuses
Maker Littelfuse
PDF Download

440A Datasheet PDF






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