443E Series - 443E Series - NANO2® High Breaking Capacity 250V Surface Mount Fuse

Littelfuse Fuse 443E Image
Roll Over to Zoom
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 443E Series is a Nano2®, 250 V fuse. It is a surface mount Universal Modular Fuse (UMF) that complies with IEC 60127-4. It is RoHS-compliant and fully compatible with lead-free solder alloy and higher temperature profiles associated with lead-free assembly.


  • 250 VAC/VDC voltage rating with 200 A interrupting rating
  • Slo-Blo® Fuse
  • RoHS-compliant
  • Fully compatible with leadfree solder alloys and higher temperature profiles associated with lead-free assembly


  • AC/DC power adaptor
  • Telecom equipment system power
  • Portable system built-in AC/DC converter

Access specifications, certifications, check availability and order parts below

Catalog #VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
BodyOpeningOperating TemperaturePartner ECAD ModelsStockSamples
04431.25ERE2502503.970.1CeramicSlo-Blo/Time Lag (T)/Time Delay-55° to 125°C04431.25ERECheckOrder
Catalog # Certificates
Sorting icon
04431.25ERE CEiconUKCAiconcURiconVDEiconCQCiconUMFicon
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
04431.25ERE FUSE 250V TL HBC NANO2 ROHS 1.25A RoHS No 04/05/2018 PbFree No 04/05/2018 CoC_RoHS9_04431.25ERE REACH219_Declaration_(Contain)_04431.25ERE Yes
Contains IPC_04431.25ERE
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.