Surface Mount Fuses Datasheet
438A Series
AEC-Q200 Qualified > Ceramic Fuse
RoHS Pb
Description
The 438A series AEC-Q200 Qualified fuses are specifically tested
to cater secondary circuit protection needs of compact auto
electronics application.
The general design ensures excellent temperature stability and
performance reliability.
The high I²t values which is typical in the Littelfuse ceramic fuse
family ensure high inrush current withstand capability.
Features & Benefits
■ OperatingTemperature from
■ Conforms to EN 60127-1 and
-55ºC to +150ºC
EN 60127-7
■ 100% Lead-free, RoHS
compliant and Halogen-free
■ CE Mark indicates suitability
for the European Market
■ Suitable for both leaded and
■ UKCA Mark indicates suitability
lead-free reflow/wave soldering for the UK Market
Additional Information
■ Recognized to UL/CSA/NMX
248-1 and UL/CSA/NMX 248-
14
■ AEC-Q200 Qualified
Applications
■ Li-ion Battery
Resources
Accessories
Samples
■ TFT Display
■ LED Head-Lights
■ Battery Management System
(BMS)
Agency Approvals
■ Automotive Navigation
System
■ Clusters
Agency
Agency File Number
Ampere Range
E10480
29862
J50489122
N/A
0.25A – 6A
0.25A – 6A
0.25A – 6A
0.25A – 6A
0.25A – 6A
Electrical Characteristics for Series
% of Ampere Rating Ampere Rating
OpeningTime at 25ºC
100%
250%
0.250A – 6A
0.250A – 6A
4 Hours, Minimum
N/A
5 Seconds, Maximum
Electrical Specifications by Item
Ampere
Rating
(A)
Max.
Voltage
Rating (V)
Nominal
Nominal NominalVoltage Nominal Power
Agency Approvals
Amp
Code
Interrupting Rating
(AC/DC)1
Resistance Melting I2t Drop At Rated
Dissipation At
Rated Current (W)
(Ohms)2
2.218
1.247
0.829
0.466
0.310
0.200
(A2Sec.)3
0.0017
0.0041
0.0100
0.0281
0.0593
0.0510
0.1440
0.181
0.240
0.439
0.647
0.730
Current (V)4
0.550
0.488
0.486
0.378
0.351
0.365
0.360
0.107
0.095
0.093
0.082
0.079
0.074
0.25 .250 63VDC
0.375 .375 63VDC
0.5
0.138
0.183
0.243
0.284
0.351
0.456
0.540
0.214
0.238
0.279
0.287
0.316
0.370
0.432
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
.500 63VDC
50A @ 63VDC
50A @ 32VAC
0.75 .750 63VDC
1
1.25
1.75
2
2.5
3
3.5
4
5
001. 63VDC
1.25 63VDC
1.75 32VDC 50A@32VAC/32VDC 0.1405
002.
02.5
003.
03.5
004.
005.
006.
32
32
32
32
32
32
24
0.0490
0.0364
0.0264
0.0210
0.0177
0.0127
50A @ 32VDC/12VAC
0.747
6
50A @ 24VDC/12VAC 0.0086
1.444
0.072
Notes:
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.
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.
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 re-rating
information.
3. Nominal Melting I²t measured at 1 msec. opening time.
Devices designed to be mounted with marking code facing up.
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/18/23
6
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