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 #Amps (A)VAC (V)Nominal Melting I2T (A2sec)Resistance
Interrupting RatingBodyMin Operating Temp °CMax Operating Temp (°C)Marking CodeMSLStockSamplesCompare
0443.5000.52501.610.650A@250VACCeramic-55125LF 500mA T AC250V1CheckOrder
0443.7500.752503.0250.27550A@250VACCeramic-55125LF 750mA T AC250VCheckOrder
0443001125010.170.1850A@250VACCeramic-55125LF 1A T AC250V1CheckOrder
0443002225018.060.05250A@250VACCeramic-55125LF 2A T AC250V1CheckOrder
0443003325051.440.02850A@250VACCeramic-55125LF 3A T AC250V1CheckOrder
04430044250122.50.01650A@250VACCeramic-55125LF 4A T AC250VCheckOrder
04430055250180.60.011550A@250VACCeramic-55125LF 5A T AC250VCheckOrder
044301.51.525014.720.150A@250VACCeramic-55125LF 1.5A T AC250V1CheckOrder
044302.52.525018.130.03550A@250VACCeramic-55125LF 2.5A T AC250V1CheckOrder
044303.53.525053.140.01950A@250VACCeramic-55125LF 3.5A T AC250V1CheckOrder

pdf icon 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 Philipines ISO 90012000

PhilsISO14001Certificateicon Phils ISO 14001 2004

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