0438005.WR Datasheet, PDF (1/3 Pages) Littelfuse – Surface Mount Fuses Ceramic Fuse > 438 Series

Surface Mount Fuses
Ceramic Fuse > 438 Series
438 Series – 0603 Fast-Acting Fuse
Description
The 438 Series is a 100% Lead-free, RoHS compliant and
Halogen-free fuse series designed specifically to provide
over-current protection to circuits that operate under high
working ambient temperature up to 150ºC.
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.
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
LR29862
AMPERE RANGE
0.250A – 6A
0.250A – 6A
Electrical Characteristics for Series
% of Ampere
Rating
100%
250%
Ampere Rating
0.250A – 6A
0.250A – 6A
Opening Time at 25ºC
4 Hours, Minimum
5 Seconds, Maximum
Features
• Operating Temperature • Suitable for both leaded
from -55ºC to +150ºC
and lead-free reflow /
• 100% Lead-free, RoHS
wave soldering
compliant and Halogen-
free
Applications
• Handheld Electronics
• LCD Displays
• Battery Packs
• Hard Disk Drives
• SD Memory Cards
• Automotive Electronics
Electrical Specifications by Item
Ampere
Rating
(A)
Amp
Code
Max.
Voltage
Rating (V)
Interrupting Rating
Nominal Nominal Nominal Voltage Nominal Power ^{Agency Approvals}
Resistance Melting I²t Drop At Rated Dissipation At
(Ohms)² (A²Sec.)³
Current (V)⁴ Rated Current (W)
0.25 .250
63
2.024
0.0017
0.375 .375
63
1.247
0.0041
0.5 .500
63
0.829
0.0100
0.75 .750
63
50A @ 63VDC
0.466
0.0281
1
001.
63
50A @ 32VAC
0.310
0.0593
1.25 1.25
63
0.200
0.0510
1.5 01.5
63
0.174
0.0902
1.75 1.75
63
0.125
0.1440
2
002.
32
0.051
0.1490
2.5 02.5
32
0.0324
0.1977
3
003.
3.5 03.5
32
32
50A @ 32VDC/12VAC
0.0252
0.0203
0.2922
0.4752
4
004.
32
0.0169
0.6920
5
005.
32
0.0113
0.7398
6
006.
24
50A @ 24VDC/12VAC 0.0087
1.3838
0.550
0.488
0.486
0.378
0.351
0.365
0.368
0.360
0.107
0.095
0.093
0.082
0.079
0.074
0.072
0.138
0.183
0.243
0.284
0.351
0.456
0.552
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
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 1 msec. 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
Rerating Curve”for additional rerating information.
Devices designed to be mounted with marking code facing up.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/438.html for current information.
1
Revised: February 15, 2012
438 Series