Fuse Datasheet
Surface Mount Fuses
0603 Time-Lag > Ceramic Fuse > 408 Series
RoHS Pb
Description
Littelfuse 408 Series is a 100% lead-free, RoHS compliant, and
halogen-free fuse designed specifically to provide overcurrent
protection to circuits that operate under high working ambient
temperatures up to 150 ºC and high in-rush currents. The general
design ensures excellent temperature stability and performance
reliability. This high I2t time lag fuse is designed to have ultra-high
in-rush current withstand capability to avoid nuisance fuse open.
Features
■ OperatingTemperature from -55 ºC to +150 ºC
■ UL Recognized to UL / CSA / NMX 248-1 and
UL / CSA / NMX 248-14
■ 100% Lead-free, RoHS compliant, and Halogen-free
■ Suitable for both leaded and lead-free reflow / wave soldering
■ Ultra-high I2t values
Agency Approvals
Benefits
Agency
Agency File Number
Ampere Range
■ Avoids nuisance opening due to high inrush and surge current
inherent in the system
E10480
1–7 A
■ High current ratings in small size
Electrical Characteristics
Application
■ Displays
% of Ampere Rating
Opening Time at 25 ºC
■ Scanners
■ Servers
■ Data Modems
■ Gaming Consoles
100%
200%
300%
800%
4 hours Minimum
■ Computers
■ Printers
120 secs Max
3 secs Max
Additional Information
0.05 secs Max
Electrical Specifications
Resources
Accessories
Samples
Agency
Approval
Nominal Voltage Nominal Power
Drop at Rated Dissipation at
Max. Voltage
Interrupting
Nominal
Resistance
(Ohms)2
Nominal
Ampere Rating
(A)
Amp Code
Rating
(V)
Rating
Melting I2t
(A2Sec.)3
Current
Rated Current
(W)
(AC/DC)1
(V)4
1.00
1.50
2.00
2.50
3.00
3.50
4.00
5.00
001.
01.5
002.
02.5
003.
03.5
004.
005.
0 0 7.
32
32
32
32
32
32
32
32
32
0.260
0.116
0.065
0.052
0.030
0.027
0.018
0.013
0.0105
0.09
0.18
0.55
0.65
0.87
1.25
2.40
3.40
4.80
0.400
0.220
0.190
0.180
0.135
0.130
0.120
0.115
0.112
0.400
0.330
0.380
0.450
0.405
0.455
0.480
0.575
0.784
X
X
X
X
X
X
X
X
X
50A@32VDC
7. 0 0
Notes:
1. Nominal Resistance measured with < 10% rated current.
•
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
Re-rating Curve for additional derating information.
2. Nominal Melting I2t measured at 1 msec opening time.
3. Nominal Voltage Drop measured at rated current after temperature has stabilized.
•
Devices designed to be mounted with marking code facing up.
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.06/16/23
1