443 Series - NANO Time Lag Subminiature Surface Mount

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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 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
BodyMin Operating Temp (°C)Max Operating Temp (°C)MSLOpeningPartner ECAD ModelsStockSamplesCompare
0443.5002501.610.6Ceramic-551251Slo-Blo/Time Lag (T)/Time Delay443_5CheckOrder
0443.7502503.0250.275Ceramic-55125Slo-Blo/Time Lag (T)/Time Delay443_75CheckOrder
044300125010.170.18Ceramic-551251Slo-Blo/Time Lag (T)/Time Delay443001CheckOrder
044300225018.060.052Ceramic-551251Slo-Blo/Time Lag (T)/Time Delay443002CheckOrder
044300325051.440.028Ceramic-551251Slo-Blo/Time Lag (T)/Time Delay443003CheckOrder
0443004250122.50.016Ceramic-55125Slo-Blo/Time Lag (T)/Time Delay443004CheckOrder
0443005250180.60.0115Ceramic-55125Slo-Blo/Time Lag (T)/Time Delay443005CheckOrder
044301.525014.720.1Ceramic-551251Slo-Blo/Time Lag (T)/Time Delay44301_5CheckOrder
044302.525018.130.035Ceramic-551251Slo-Blo/Time Lag (T)/Time Delay44302_5CheckOrder
044303.525053.140.019Ceramic-551251Slo-Blo/Time Lag (T)/Time Delay44303_5CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
0443.500DR FUSE 250V TL NANO2 RoHS .500A RoHS No PbFree No CoC_RoHS9_0443.500DR_05-10-2019 REACH197_Declaration_with_Pb_0443.500DR_05-10-2019 Yes
0443.750DR FUSE 250V TL NANO2 RoHS .750A RoHS No PbFree No CoC_RoHS9_0443.750DR_12-15-2020 REACH209_Declaration_-Contain-_0443.750DR_12-15-2020 Yes
0443001.DR FUSE 250V TL NANO2 RoHS 1A RoHS No PbFree No CoC_RoHS9_0443001.DR_10-24-2019 REACH209_Declaration_-Contain-_0443001.DR_11-6-2020 Yes
0443002.DR FUSE 250V TL NANO2 RoHS 2A RoHS No PbFree No CoC_RoHS9_0443002.DR_09-13-2019 REACH205_Declaration_-Contain-_0443002.DR_3-27-2020 Yes
0443003.DR FUSE 250V TL NANO2 RoHS 3A RoHS No PbFree No CoC_RoHS9_0443003.DR_07-08-2019 REACH211_Declaration_(Contain)_0443003.DR_04-27-2021 Yes
0443004.DR FUSE 250V TL NANO2 RoHS 4A RoHS No PbFree No CoC_RoHS9_0443004.DR_03-01-2018 REACH211_Declaration_-Contain-_0443004.DR_02-05-2021 Yes
0443005.DR FUSE 250V TL NANO2 RoHS 5A RoHS No PbFree No CoC_RoHS9_0443005.DR_10-08-2019 REACH209_Declaration_-Contain-_0443005.DR_12-21-2020 Yes
044301.5DR FUSE 250V TL NANO2 RoHS 1.5A RoHS No PbFree No CoC_RoHS9_044301.5DR_04-20-2020 REACH201_Declaration_with_Pb_044301.5DR_11-28-2019 Yes
044302.5DR FUSE 250V TL NANO2 RoHS 2.5A RoHS No PbFree No CoC_RoHS9_044302.5DR_09-07-2017 REACH201_Declaration_with_Pb_044302.5DR_12-13-2019 Yes
044303.5DR FUSE 250V TL NANO2 RoHS 3.5A RoHS No PbFree No CoC_RoHS9_044303.5DR_09-22-2017 REACH191_Declaration_with_Pb_044303.5DR_09-25-2018 Yes
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