463 Series - Nano2® Very Fast-Acting Subminiature Surface Mount Fuse

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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 463 Series NANO²® fuse is a fast-acting, very high current fuse designed for high operating current applications. It offers enhanced thermal cycling endurance (up to 500 cycles). Its low temperature rise and excellent temperature stability characteristics make it ideal for use in datacom and telecom equipment like high-end servers, base stations, power supplies, and blade computing applications. The 463 Series offers high-amp circuit protection, ultra-high interrupting ratings (up to 500A@72VDC), and a compact (10.1mm x 3.12mm x 3.12mm) surface-mount form factor to save board space.


  • Surface mount fuse in a small footprint
  • High current rating: 15A-30A
  • Higher voltage rating up to 100VDC and 250VAC
  • High melting i2t
  • Enhanced thermal cycling endurance
  • Operating temperature range from -55°C to 125


  • High end servers
  • Base station power supply
  • Voltage regulator module for PC server
  • Cooling fan system for PC server
  • Advance Telecommunication Computing Architecture (ATCA) applications for cloud computing
  • Battery Management System (Industrial Tools) 

Access specifications, certifications, check availability and order parts below

Catalog #VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
BodyOpeningOperating TemperaturePartner ECAD ModelsStockSamplesCompare
0463015.1002501420.0047CeramicVery Fast-Acting (FF)-55° to 125°C0463015.CheckOrder
0463020.1002504330.0027CeramicVery Fast-Acting (FF)-55° to 125°C0463020.CheckOrder
0463025.1002506680.00215CeramicVery Fast-Acting (FF)-55° to 125°C0463025.CheckOrder
0463030.1002509160.00913CeramicVery Fast-Acting (FF)-55° to 125°C0463030.CheckOrder
Catalog # Certificates
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0463015. cRUiconMETIiconTUVicon
0463020. cRUiconTUVicon
0463025. cRUiconTUVicon
0463030. cRUiconTUVicon
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
0463015.ER FUSE 250V V/FA NANO2 ROHS 15A RoHS No 08/28/2014 PbFree No 08/28/2014 CoC_RoHS9_0463015.ER REACH219_Declaration_(Contain)_0463015.ER Yes
Contains IPC_0463015.ER
0463020.ER FUSE 250V V/FA NANO2 ROHS 20A RoHS No 06/05/2014 PbFree No 06/05/2014 CoC_RoHS9_0463020.ER REACH211_Declaration_Contain-_0463020.ER Yes
Contains IPC_0463020.ER
0463025.ER FUSE 250V V/FA NANO2 ROHS 25A RoHS No 08/03/2014 PbFree No 08/03/2014 CoC_RoHS9_0463025.ER REACH219_Declaration_(Contain)_0463025.ER Yes
Contains IPC_0463025.ER
0463030.ER FUSE 250V V/FA NANO2 ROHS 30A RoHS No 08/28/2014 PbFree No 08/28/2014 CoC_RoHS9_0463030.ER REACH219_Declaration_(Contain)_0463030.ER Yes
Contains IPC_0463030.ER
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