454 Series - NANO Slo-Blo® Subminiature Surface Mount Fuse

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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.

The NANO2 Slo-Blo fuse has enhanced inrush withstand characteristics over the NANO2 Fast-Acting fuse. The unique time delay feature of this fuse design helps solve the problem of nuisance "opening" by accommodating inrush currents that normally cause a fast-acting fuse to open.


  • Time-Lag (Slo-Blo)
  • Small size 
  • Wide range of current rating available (375mA to 12A)
  • Wide operating temperature range
  • Low temperature de-rating
  • RoHS compliant
  • Halogen Free

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
Interrupting RatingBodyMin Operating Temp °CMax Operating Temp (°C)Marking CodeStockSamplesCompare
04540012.126072260.460.0061Ceramic-55125LF T 12ACheckOrder
0454008.86072137.340.0088Ceramic-55125LF T 8ACheckOrder
0454.3750.3751251250.1011.2300A@32VDCCeramic-55125LF T 375mACheckOrder
0454.5000.51251250.240.7300A@32VDCCeramic-55125LF T 500mACheckOrder
0454.7500.751251250.9040.36300A@32VDCCeramic-55125LF T 750mACheckOrder
045400111251251.980.225300A@32VDCCeramic-55125LF T 1ACheckOrder
045400221251258.20.0625300A@32VDCCeramic-55125LF T 2ACheckOrder
0454003312512520.160.034300A@32VDCCeramic-55125LF T 3ACheckOrder
0454004412512534.40.0186300A@32VDCCeramic-55125LF T 4ACheckOrder
0454005512512553.720.0136300A@32VDCCeramic-55125LF T 5ACheckOrder
0454007.76072123.830.0105Ceramic-55125LF T 7ACheckOrder
045401.51.51251253.650.093300A@32VDCCeramic-55125LF T 1.5ACheckOrder
045402.52.5125125150.045300A@32VDCCeramic-55125LF T 2.5ACheckOrder
045403.53.512512526.530.0224300A@32VDCCeramic-55125LF T 3.5ACheckOrder

452 454 TC Curver

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The NANO2 Slo-Blo® fuse has enhanced inrush withstand characteristics over the NANO2 Fast-Acting fuse...

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