436 Series - SMTelecom® Fuse

Series: 436      Obsolete 2002-02-19      Replaced By 461 Questions? Contact Littelfuse Support
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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.

For new designs use the 461 series.


  •  Surface mount overcurrent protection from lightning and power cross.
  •  Meets UL 1459/1950 power cross requirements stand alone.
  •  Ideal for use in telecommunication equipment including modems, fax machines, desk top phones, answering machines and line cards.
  •  UL recognized, with a 250 V operating voltage.
  •  Top side marking allows visual verification of ampere rating.
  •  Complies with Bellcore GR-1089-CORE and FCC 47 part 68 Surge Specifications.

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
Interrupting RatingOpeningSizeMin Operating Temp °CMax Operating Temp (°C)Compare
Obsolete: 2002-02-19
12501252.6060.475100A@250VDCSlo-Blo/Time Lag (T)/Time DelayOtherNot applicableNot applicable
Obsolete: 2002-02-19
1.52501255.9210.21100A@250VDCSlo-Blo/Time Lag (T)/Time DelayOtherNot applicableNot applicable
Obsolete: 2002-02-19
1.625012513.50.165100A@250VDCSlo-Blo/Time Lag (T)/Time DelayOtherNot applicableNot applicable
Obsolete: 2002-02-19
1.252501253.6580.305100A@250VDCSlo-Blo/Time Lag (T)/Time DelayOtherNot applicableNot applicable
Catalog # Certificates
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0436001. csa
043601.5 csa
043601.6 csa
04361.25 csa

436 Series Data Sheet

436 Series Time Curve Data

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