H3390 Series - Ring Lug 1 / 4" Stud

Series: H3390
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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.

Littelfuse offers Ring Lug probe housings suitable for a wide range of temperature sensing applications. If the dimensions on this product won't work for your requirements, please contact us for further assistance. Important Note: The product shown is a probe housing only. The temperature sensing element needs to be selected along with other physical properties (lead wire type, termination, etc.).

Your requirements, your sensor!

Please fill in as much information as possible about your unique temperature sensor requirement using our application form and someone from our engineering team will contact you.

Application Form

Littelfuse LL-41 ''MELF'' style glass encapsulated surface mount thermistors are manufactured using super stable NTC chips which are hermetically sealed in a glass package. The result is a device which exhibits excellent long-term reliability and stability even when subjected to severe environmental or thermal conditions. Their uniform dimensions make them especially suitable for use with automatic insertion equipment.


  • High temperature capability to +220°C
  • Surface mountable
  • Hermetically sealed glass package
  • Low cost
  • Excellent long-term stability


  • Non-standard resistance values and tolerances
  • Point matched at specified temperatures
  • Tape and reel packaging


  • Thermal time constant: 8 seconds max
  • Dissipation constant: 3 mW/°C
To request product environmental information, please complete the Product Environmental Information Request Form.

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pdf icon Sensing Products Selection Guide

This guide provides an introduction to magnetic sensing and options for value-added custom design packages.