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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Surface Mount Fuses
NANO
2®
> Very Fast-Acting Fuse > 451/453 Series
Materials
Body: Ceramic
Terminations:
Gold-Plated Caps / Sn-dipped Silver Plated
Caps (451 RoHS/HF series)
SnPb Plated Caps (for 451 Non-RoHS series,
375mA-15A)
Silver-plated Caps (451MR RoHS ratings
below 375mA and 453 RoHS Series)
Product Marking Brand, Ampere Rating
Operating
Temperature
–55°C to 125°C
Moisture Sensitivity
Level
Level 1, J-STD-020
Solderability MIL-STD-202, Method 208
Insulation
Resistance
(after Opening)
MIL-STD-202, Method 302, Test Condition
A (10,000 ohms minimum)
Thermal Shock
MIL-STD-202, Method 107, Test
Condition B, 5 cycles, -65°C /
+125°C, 15 minutes @ each extreme
Mechanical Shock
MIL-STD-202, Method 213, Test I:
Deenergized. 100G’s pk amplitude,
sawtooth wave 6ms duration, 3
cycles XYZ+xyz = 18 shocks
Vibration
MIL-STD-202, Method 201: 0.03”
amplitude, 10-55 Hz in 1 min. 2hrs
each XYZ=6hrs
Moisture Resistance MIL-STD-202, Method 106, 10 cycles
Salt Spray
MIL-STD-202, Method 101, Test
Condition B (48hrs)
Resistance to Soldering
Heat
MIL-STD-202, Method 210, Test
condition B (10 sec at 260°C)
Product Characteristics
Dimensions
Packaging
Part Numbering System
6.86
(.270")
3.15
(.124")
2.95
(.116")
1.96
(.077")
2.69 ± .25
(.106")
2.69 ± .25
(.106")
1.45
(.057")
6.10 ± .20
(.240")
Recommended pad layout
F
7 A
Packaging Option Packaging Specification Quantity
Quantity &
Packaging Code
12mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 5000 NR
12mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 1000 MR
0451 001. M R L
SERIES
AMP Code
QUANTITY Code
PACKAGING Code
Refer to Electrical
characteristics table
M = 1000 pcs
N = 5000 pcs
R = Tape and Reel
L-RoHS Compliant & Halogen Free
(Gold Plated Caps)
451 = Gold / SnPb / Silver Plated Caps
453 = Silver Plated Caps
NOTE: “L” suffix applies to 451 series only
- 451 series may be ordered as either “RoHS and HF” (“L” suffix) or non-RoHS (no suffix) version.
- 453 series is available only as RoHS compliant version and does not require “L” suffix. Please do not
include “L” suffix within 453 series ordering instructions.
SN-RoHS Compliant & Halogen Free
(Sn-dipped Caps)
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.