Datasheet

© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/21/19
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)
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 / Sn-dipped Silver Plated Caps
453 = Silver Plated Caps
NOTE: “L” suffix applies to 451 series only
- 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 - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications,
devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth
in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable
for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and
Conditions of Sale, unless otherwise agreed by Littelfuse. 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.