443 Series - NANO2® Time Lag Subminiature Surface Mount

External overview 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 250 NANO2 Fuse is a small square surface mount fuse that is designed to support higher voltage space sensitive applications. Enables compliance with the RoHS directive and is fully compatible with lead-free solder alloy and higher temperature profiles associated with lead-free assembly.


  • 250V rating
  • Available in ratings of 0.50A - 5.0A
  • Time Lag
  • RoHS compliant
  • Fully compatible with lead free 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
  • Lighting system

Access specifications, certifications, check availability and order parts below

Catalog #VAC (V)Nominal Melting I2T (A2sec)Resistance
BodyMSLOpeningOperating TemperaturePartner ECAD ModelsStockSamplesCompare
0443.5002501.610.6CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443.500CheckOrder
0443.7502503.0250.275CeramicSlo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443.750CheckOrder
044300125010.170.18CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443001CheckOrder
044300225018.060.052CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443002CheckOrder
044300325051.440.028CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443003CheckOrder
0443004250122.50.016CeramicSlo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443004CheckOrder
0443005250180.60.0115CeramicSlo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443005CheckOrder
044301.525014.720.1CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C044301.5CheckOrder
044302.525018.130.035CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C044302.5CheckOrder
044303.525053.140.019CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C044303.5CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
0443.500DR FUSE 250V TL NANO2 RoHS .500A RoHS No PbFree No CoC_RoHS9_0443.500DR REACH211_Declaration_(Contain)_0443.500DR Yes
Contains IPC_0443.500DR
0443.750DR FUSE 250V TL NANO2 RoHS .750A RoHS No PbFree No CoC_RoHS9_0443.750DR REACH219_Declaration_(Contain)_0443.750DR Yes
0443001.DR FUSE 250V TL NANO2 RoHS 1A RoHS No PbFree No CoC_RoHS9_0443001.DR REACH219_Declaration_(Contain)_0443001.DR Yes
Contains IPC_0443001.DR
0443002.DR FUSE 250V TL NANO2 RoHS 2A RoHS No PbFree No CoC_RoHS9_0443002.DR REACH219_Declaration_(Contain)_0443002.DR Yes
Contains IPC_0443002.DR
0443003.DR FUSE 250V TL NANO2 RoHS 3A RoHS No PbFree No CoC_RoHS9_0443003.DR REACH211_Declaration_(Contain)_0443003.DR Yes
Contains IPC_0443003.DR_0443003.DRLC
0443004.DR FUSE 250V TL NANO2 RoHS 4A RoHS No PbFree No CoC_RoHS9_0443004.DR REACH211_Declaration_Contain-_0443004.DR Yes
Contains IPC_0443004.DR
0443005.DR FUSE 250V TL NANO2 RoHS 5A RoHS No PbFree No CoC_RoHS9_0443005.DR REACH219_Declaration_(Contain)_0443005.DR Yes
Contains IPC_0443005.DR
044301.5DR FUSE 250V TL NANO2 RoHS 1.5A RoHS No PbFree No CoC_RoHS9_044301.5DR REACH219_Declaration_(Contain)_044301.5DR Yes
Contains IPC_044301.5DR
044302.5DR FUSE 250V TL NANO2 RoHS 2.5A RoHS No PbFree No REACH201_Declaration_with_Pb_044302.5DR Yes
Contains IPC_044302.5DR
044303.5DR FUSE 250V TL NANO2 RoHS 3.5A RoHS No PbFree No REACH191_Declaration_with_Pb_044303.5DR Yes
Contains IPC_044303.5DR
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.

pdf icon Security Camera and Video Doorbells

pdf icon Wireless Charger Solutions

pdficon Fuse 443 Datasheet

443 Series Fuse is a small square surface mount fuse that is designed to enable compliance with the RoHS directive...

Littelfuse_Phils_ISO9001_102407icon 2022-06-17_ISO 9001 2015_LF Phils

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

pdf icon Building and Home Automation Application Guide

Today's buildings and homes are equipped with intelligent technologies for safer, more convenient, and energy-efficient living.

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

kcicon KTL_SU05024_14002_9_23_14