L17T Series - Littelfuse L17T Fuses Offer Superior Protection for Telecommunications Systems

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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 L17T series fuses are specifically designed for short-circuit protection of telecommunication systems. They are extremely current-limiting and offer reliable protection of sensitive DC power distribution systems. Constructed with silver-plated elements for low l2t and peak let-through, these advanced fuses eliminate equipment damage due to surges and spikes. The L17T Series fuse’s unique element geometry provides cooler running temperatures, helping to minimize heat within enclosures.


  • Extremely current-limiting
  • Low operating temperature
  • Low I2t
  • POWR-GARD® technology

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)Interrupting RatingOpeningVDC (V)StockSamplesCompare
L17T07070100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T09090100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T100100100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T10001000100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T11001100100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T12001200100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T125125100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T150150100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T175175100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T200200100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T225225100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T250250100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T300300100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T350350100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T400400100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T450450100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T500500100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T600600100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T800800100 kA @ 170 VdcFast-Acting (F)170CheckOrder
L17T900900100 kA @ 170 VdcFast-Acting (F)170CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
L17T070.T FUS 170VDC VF/A TELE-GARD 70A RoHS No 01/01/2007 PbFree No No
L17T090.T FUS 170VDC VF/A TELE-GARD 90A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T090.T REACH205_Declaration_Contain-_L17T090.T No
L17T100.T FUS 170VDC VF/A TELE-GARD 100A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T100.T REACH205_Declaration_Contain-_L17T100.T No
L17T1000V FUS 170VDC VF/A TELE-GARD 1000A RoHS No 01/01/2007 PbFree No No
L17T1100V FUS 170VDC VF/A TELE-GARD 1100A RoHS No 01/01/2007 PbFree No No
L17T1200V FUS 170VDC VF/A TELE-GARD 1200A RoHS No 01/01/2007 PbFree No No
L17T125.T FUS 170VDC VF/A TELE-GARD 125A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T125.T REACH205_Declaration_Contain-_L17T125.T No
L17T150.T FUS 170VDC VF/A TELE-GARD 150A RoHS No 01/01/2007 PbFree No No
L17T175.T FUS 170VDC VF/A TELE-GARD 175A RoHS No 01/01/2007 PbFree No No
L17T200.T FUS 170VDC VF/A TELE-GARD 200A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T200.T REACH201_Declaration_with_Pb_L17T200.T No
L17T225.T FUS 170VDC VF/A TELE-GARD 225A RoHS No 01/01/2007 PbFree No No
L17T250.T FUS 170VDC VF/A TELE-GARD 250A RoHS No 01/01/2007 PbFree No REACH_SVHC Declaration (Contain)_L17T250.T No
L17T300.V FUS 170VDC VF/A TELE-GARD 300A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T300.V REACH205_Declaration_Contain-_L17T300.V No
L17T350.V FUS 170VDC VF/A TELE-GARD 350A RoHS No 01/01/2007 PbFree No No
L17T400.V FUS 170VDC VF/A TELE-GARD 400A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T400.V REACH205_Declaration_Contain-_L17T400.V No
L17T450.V FUS 170VDC VF/A TELE-GARD 450A RoHS No 01/01/2007 PbFree No No
L17T500.V FUS 170VDC VF/A TELE-GARD 500A RoHS No 01/01/2007 PbFree No No
L17T600.V FUS 170VDC VF/A TELE-GARD 600A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T600.V REACH219_Declaration_(Contain)_L17T600.V No
Contains IPC_L17T600.V
L17T800.V FUS 170VDC VF/A TELE-GARD 800A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L17T800.V REACH205_Declaration_Contain-_L17T800.V No
L17T900.V FUS 170VDC VF/A TELE-GARD 900A RoHS No 01/01/2007 PbFree No No
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