40705.5 - 407 Series Series

Littelfuse Fuse 407 Image
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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.

Littelfuse 407 Series is a 100% Lead-free, RoHS compliant and Halogen-free fuse designed specifically to provide overcurrent protection to circuits that operate under high working ambient temperatures up to 150º C and high in-rush currents. The general design ensures excellent temperature stability and performance reliability. This high I2t time lag fuse is designed to have ultra-high in-rush current withstand capability to avoid nuisance fuse open.


  • Ultra High I2T value,
  • 100% Lead Free ROHS compliant and Halogen Free, 
  • Suitable for both leaded and lead-free reflow/wave soldering, 
  • Operating Temperature from -55º C to +150º C


  • Display,
  • Server,
  • Computer,
  • Printer, Scanner,
  • Data Modems,
  • Gaming Consoles
Property (Mouseover for details) Value
Body Ceramic
Nominal Melting I2T (A2sec) 8.55
Moisture Sensitivity Level IPC/JEDEC J-STD-020C Level 1
Nominal Cold Resistance (Ohms) 0.014
Opening Slo-Blo/Time Lag (T)/Time Delay
Operating Temperature -55° to 150°C
Partner ECAD Models 40705.5
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