443LC Series - NANO2® 280VAC-rated Surface Mount Fuses

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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 443LC Series NANO²® fuse is a 4012 footprint, Slo Blo surface mount fuse which provides overcurrent protection for applications with working voltage up to 277VAC.

Its high I2t provides superior surge withstand capability for its small footprint. This can therefore be used on applications where board space is a limitation, without worrying of any nuisance failures due to surge/pulse current and voltages in the application, or where larger sized solutions are previously being used.


  • 280VAC-rated fuse in a relatively small footprint of 10mm x 3mm (sq)
  • Slo Blo fuse type with relatively high I2t values
  • RoHS compliant, Halogen Free
  • Surface mount type fuse


  • Option for applications with working voltage up to 277VAC
  • With superior surge withstand capability, considering its size, and is suited for applications where surge current/voltages are inherent and board space is a constraint
  • Compliant to global EHS standards
  • Fully compatible with lead free solder alloys and higher temperature profiles associated with high volume, lead-free assembly SMD processes


  • Lighting Ballast
  • LED Driver Boards
  • LED Dimmer Controllers
  • 3-Phase power supplies
  • Utility connected  appliances and equipment rated at 277V AC

Access specifications, certifications, check availability and order parts below

Catalog #VAC (V)Nominal Melting I2T (A2sec)Resistance
BodyMSLOpeningOperating TemperaturePartner ECAD ModelsStockSamplesCompare
0443.5002801.610.6CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443.500CheckOrder
0443.7502803.0250.275CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443.750CheckOrder
044300128010.170.18CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443001CheckOrder
044300228018.060.052CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443002CheckOrder
044300328051.440.028CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443003CheckOrder
0443004280122.50.016CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443004CheckOrder
0443005280180.60.0115CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C0443005CheckOrder
044301.528014.720.1CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C044301.5CheckOrder
044302.528018.130.035CeramicLevel 1Slo-Blo/Time Lag (T)/Time Delay-55° to 125°C044302.5CheckOrder
044303.528053.140.019CeramicLevel 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
0443.500DRLC FUSE 280V TL NANO2 ROHS .500A RoHS No 06/06/2016 PbFree No CoC_RoHS9_0443.500DRLC REACH209_Declaration_Contain-_0443.500DRLC Yes
0443.750DRLC FUSE 280V TL NANO2 ROHS .750A RoHS No 06/06/2016 PbFree No Yes
0443001.DRLC FUSE 280V TL NANO2 ROHS 1A RoHS No 06/06/2016 PbFree No CoC_RoHS9_0443001.DRLC Yes
0443002.DRLC FUSE 280V TL NANO2 ROHS 2A RoHS No 06/06/2016 PbFree No CoC_RoHS9_0443002.DRLC REACH219_Declaration_(Contain)_0443002.DRLC Yes
Contains IPC_0443002.DRLC
0443003.DRLC FUSE 280V TL NANO2 ROHS 3A RoHS No 12/26/2018 PbFree No 12/26/2018 CoC_RoHS9_0443003.DRLC REACH219_Declaration_(Contain)_0443003.DRLC Yes
Contains IPC_0443003.DR_0443003.DRLC
0443004.DRLC FUSE 280V TL NANO2 ROHS 4A RoHS No 06/06/2016 PbFree No Yes
0443005.DRLC FUSE 280V TL NANO2 ROHS 5A RoHS No 05/23/2018 PbFree No 05/23/2018 Yes
044301.5DRLC FUSE 280V TL NANO2 ROHS 1.5A RoHS No 06/06/2016 PbFree No CoC_RoHS9_044301.5DRLC Yes
044302.5DRLC FUSE 280V TL NANO2 ROHS 2.5A RoHS No 06/06/2016 PbFree No Yes
044303.5DRLC FUSE 280V TL NANO2 ROHS 3.5A RoHS No 06/06/2016 PbFree No Yes
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