F1250T - TeleLink® Series

Series: TeleLink®
Obsolete: 2015 -04-01 Replaced By: 04611.25
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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. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

Does not require a series resistor.

Using a TeleLink® surface mount fuse in conjunction with a SIDACtor® transient voltage suppressor provides a complete regulatory-compliant solution for standards such as GR 1089, TIA/EIA-IS-968, UL 60950, and ITU K.20 and K.21.

Designed to carry 100 percent of its rated current for four hours and 250 percent of its rated current for one second minimum and 120 seconds maximum. Typical time is four to 10 seconds.

For optimal performance, an operating current of 80% or less is recommended.


  • Interrupt test characterized at 50° to 70° phase angle. Phase angles approximating 90° may result in damage to the body of the fuse.
  • I2t is a non-repetitive rms surge current rating for a period of 16.7ms.
Property (Mouseover for details) Value
Opening Slo-Blo/Time Lag (T)/Time Delay
VAC (V) 600
Replaced By Part Number 04611.25ER
Operating Temperature -55° to 125°C

ULicon UL_JDYX_E10480

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