0451001. - 451 Series

Series: 451
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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. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The Nano2 SMF Fuse is a very small, square surface mount fuse that is also available in a surface mount holder.


  •  Very fast acting
  •  Small size 
  •  Wide range of current rating available (62mA to 15A)
  •  Wide operating temperature range
  •  Low temperature de-rating
  •  RoHS compliant
  •  Halogen Free
Property (Mouseover for details) Value
Body Ceramic
Nominal Melting I2T (A2sec) 0.6029
Moisture Sensitivity Level Level 1
Nominal Cold Resistance (Ohms) 0.078
Opening Very Fast-Acting (FF)
VAC (V) 125
VDC (V) 125
Partner ECAD Models 0451001.
Operating Temperature -55° to 125°C

Littelfuse_Phils_ISO9001_102407icon 2022-06-17_ISO 9001 2015_LF Phils

PhilsISO14001Certificateicon 2022-04-19_ISO 14001-2015_LF Phils

CSAicon CSA_1422-01_029862

METIicon UL_NBK030205-E10480A

TUV_50119118icon TUVR_J50446731

uricon CE_Doc_451 series

0451001. ECAD Models

TUVicon TUV_J50246731

cULicon cUL_JDYX7_E10480_101335397

ULicon UL_JDYX_E10480_101335397

pdficon EC611 Circuit Protection for Lithium Ion and Lithium Polymer Rechargeable Battery Applications

This application note summarizes how the increased use of Lithium-Ion and Lithium Polymer battery packs in applications where user safety is critical the implementation of secondary protection circuits will ensure an unsurpassed level of safety with minimal cost impact.

tc-icon 451 Series Time Curve Data

pdficon Fuse Accessories Selection Guide

A quick reference guide to selecting holders blocks and clips for fuse applications...

pdficon Fuse Selection Guide

A quick reference guide to selecting fuses for electronic applications...

pdficon Product Selection Guide

Electronics Circuit Protection Product Selection Guide - A guide to selecting Littelfuse circuit protection components for electronic applications...

pdficon Circuit Protection Technology Application Matrix

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive industrial handheld computer and telecom markets...

pdficon Fuseholder Selection Guide

pdficon Fuseology Selection Guide

Littelfuse Fuseology Selection Guide

pdficon Fuse 451 and 453 Datasheet

The Nano2 SMF Fuse is a very small Wire-in-Air (WIA) square shape surface mount fuse...

Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
0451001.MRL FUSE 125V V/FA NANO2 W/Au CAPS RoHS 1A RoHS No 01/12/2004 PbFree No CoC_RoHS9_0451001.MRL REACH_SVHC Declaration (Contain)_0451001.MRL
Contains IPC_0451001.MRL_0451001.NRL
0451001.MR FUSE 125V V/FA NANO2 W/SnPb CAPS 1A RoHS No 01/12/2004 PbFree No
0451001.NRL FUSE 125V V/FA NANO2 W/Au CAPS RoHS 1A RoHS No 01/12/2004 PbFree No CoC_RoHS9_0451001.NRL REACH181_Declaration_0451001.NRL
Does not Contain IPC_0451001.MRL_0451001.NRL
0451001.NR FUSE 125V V/FA NANO2 W/SnPb CAPS 1A RoHS No 01/12/2004 PbFree No
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