MM Series - Surface Mount NTC LL-31 MicroMELF Style (220°C)

Series: MM
MM
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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 LL-31 “MicroMELF” 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.

Features:

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

Options:

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

Specifications:

  • Thermal time constant: 5 seconds max
  • Dissipation constant: 1 mW/°C

Access specifications, certifications, check availability and order parts below

Catalog #Resis Ω @ 25°CResis Tol ± % @25°CR-T CurveBeta (K) 0-50°CMin Operating Temp °CMax Operating Temp (°C)Sample capableEngineering DrawingRT TableSamplesCompare
  
MM103E1K1000010E13320-55220NoEngineeringRT
MM103G1K1000010G3575-55220NoEngineeringRT
MM103J1F100001J3892-55220YESEngineeringRTOrder
MM103J1K1000010J3892-55220NoEngineeringRT
MM104J1F1000001J3892-55220NoEngineeringRT
MM104J1K10000010J3892-55220NoEngineeringRT
MM104R1K10000010R4140-55220NoEngineeringRT
MM153J1K1500010J3892-55220NoEngineeringRT
MM203J1F200001J3892-55220YESEngineeringRTOrder
MM203J1K2000010J3892-55220NoEngineeringRT
MM222E1K218610E13320-55220NoEngineeringRT
MM254R1K25000010R4140-55220NoEngineeringRT
MM302F1K300010F3419-55220NoEngineeringRT
MM502F1K500010F3419-55220NoEngineeringRT