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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Surface Mount Fuses
Thin Film > 0402 Size > Very Fast-Acting > 435 Series
Refer to Amp Code column in the
Electrical Specifications table.
The dot is positioned at the end of the
number sequence with whole ratings
and within for fractional ratings.
Example: 1.5 amp product is
043501.5KRHF (2 amp product shown)
Materials
Body: Epoxy / Glass Substrate;
Parts with ‘HF’ suffix: Halogen Free Epoxy / Glass
Terminations: 100% Tin over Nickel over Copper
Device Weight: 0.316mg
Terminal
Strength
MIL-STD-202, Method 211, Test Condition A
Insulation
Resistance
After Opening: Greater than 10,000Ohms
Operating
Temperature
–55°C to 90°C.
Consult temperature re-rating curve chart.
For operation above 90°C please contact
Littelfuse.
Thermal Shock Withstands 5 cycles of –55°C to 125°C
Vibration MIL-STD-202, Method 201
Product Characteristics
.558
(.022")
Reow solder
recommended
mounting pad
dimensions
.991 +/- .051
(.039" +/- .002")
Marking code varies
with amperage.
Refer to Part Marking
System chart.
Cu
.508 +/- .051
(.020" +/- .002")
.229 +/- .102
(.009" +/- .004")
0.330 +/- .102
(.013" +/- .004")
.381
(.015")
1.55
(.061")
.584
(.023")
0.292 +/- .102
(.012" +/- .004")
.2159 +/- .0889
(.0085" +/- .0035")
Sn
A
B
C
D
Dimensions
Packaging
Part Numbering System
Part Marking System
Packaging
Option
Packaging
Specification
Quantity
Quantity &
Packaging Code
8mm Tape
and Reel
EIA-481 Rev.
D (IEC 60286,
part 3)
10000 KR
A B C D
inch min 0.037 0.018 0.008 0.005
inch max 0.041 0.022 0.016 0.012
mm min 0.94 0.457 0.190 0.127
mm max 1.04 0.559 0.394 0.305
0435 002. K R HF S
SERIES
HALOGEN FREE ITEM
“S” - for .250A only
PACKAGING Code
R = Tape and Reel
QUANTITY Code
K = 10,000 Pieces
Amp
Code
Marking
Code
.250
.375
.500
.750
001.
1.25
01.5
1.75
002.
02.5
003.
03.5
004.
005.
X
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.