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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Surface Mount Fuses
Ceramic Fuse > 438 Series
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/EIC/JEDEC J-STD-002, Condition B
Humidity MIL-STD-202, Method 103, Conditions D
Resistance to
Solder Heat
MIL-STD-202, Method 210, Condition B
Product Characteristics
Moisture Resistance MIL-STD-202, Method 106
Thermal Shock
MIL-STD-202, Method 107,
Condition B-3
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/EIC/JEDEC J-STD-002,
Condition D
Terminal Strength IEC 60127-4
Dimensions
1.54 ± 0.150
[0.061 ± 0.006]
0.74
[0.029]
1.00
[0.039]
1.94
[0.076]
0.60
[0.024]
0.502 ± 0.080
[0.020 ± 0.003]
0.530 +/- 0.150
[0.021 +/- 0.006]
0.85 ± 0.150
[0.033 ± 0.006]
0.432 +/- 0.150
[0.017 +/- 0.006]
Packaging
Part Marking System
Packaging
Option
Packaging
Specification
Quantity
Quantity &
Packaging Code
8mm Tape
and Reel
EIA-481, IEC
60286, Part 3
3000 WR
Part Numbering System
0438 005. W R
SERIES
AMP CODE
QUANTITY CODE
PACKING CODE
W = 3000 pcs
R = Reel Pack
Amp Code Marking Code
.250 D
.375 E
.500 F
.750 G
0 01. H
1.25 J
01. 5 K
1.75 L
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
Amp Code Marking Code
002. N
02.5 O
003. P
03.5 R
004. S
005. T
006. U