04611.25 - 461 Series

Series: 461
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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 Littelfuse 461 Series TeleLink® surface mount, surge tolerant fuse, offers over-current protection for a wide range of telecom applications without requiring a series resistor. When used in conjunction with a Littelfuse SIDACtor® Transient Voltage Suppressor (TVS) or a GreentubeTM gas plasma arrestor, this combination provides a compliant solution for standards and recommendations such as GR-1089—Core, TIA-968-A, UL/EN/IEC 60950, and ITU K.20 and K.21. The coordination requirement contained in GR-1089—Core, and ITU K.20/21 may require a series impedance device.


  • RoHS Compliant.
  • Surface mount overcurrent protecting from power cross and allows compliance with lightning surges.
  • Meets UL 60950 3rd Edition (formerly UL 1459) power cross requirements stand alone.
  • Designed to allow compliance with Bellcore/Telcordia GR-1089-CORE and FCC 47 part 68 Surge Specifications.
  • Provides coordinated protection with Littelfuse SIDACtor® devices.
  • Ideal for use in telecommunication equipment including line cards, modems, fax machines, phones, answering machines, caller ID devices and other products connected to phone network.
  • 2A rating has improved temperature rise performance under 2.2A surge current testing.
Property (Mouseover for details) Value
Body Ceramic
Nominal Melting I2T (A2sec) 16.5
Moisture Sensitivity Level Level 1
Nominal Cold Resistance (Ohms) 0.104
Opening Slo-Blo/Time Lag (T)/Time Delay
VAC (V) 600
VDC (V) 100
Partner ECAD Models 04611.25
Operating Temperature -55° to 125°C

Littelfuse_Phils_ISO9001_102407icon 2022-06-17_ISO 9001 2015_LF Phils

PhilsISO14001Certificateicon 2022-04-19_ISO 14001-2015_LF Phils

uricon UR_JDYX2_E10480_9_30_14

04611.25 ECAD Models

CSAicon CSA 1422-30 029862

TUVicon TUVR_R50502555

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Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
04611.25ER TELELINK FUSE 600V RoHS 1.25A RoHS No 09/26/2000 PbFree No CoC_RoHS9_04611.25ER REACH219_Declaration_(Contain)_04611.25ER Yes
Contains IPC_04611.25ER
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