PW Series - Precision Interchangeable Thermistors (150°C) ± 0.5°C Accuracy - Uninsulated Leads

Series: PW
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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.

Littelfuse precision interchangeable thermistors are low cost, highly accurate, stable devices designed specifically for temperature sensing and control applications. They are particularly suited for uses where their precision interchangeability eliminates the necessity for costly individual circuit calibration.


  • High accuracy
  • Fast thermal response time
  • Low cost
  • Small size
  • Epoxy encapsulated
  • Excellent long-term stability
  • R/T Curve-matched


  • Special lead materials and lengths
  • Special encapsulants or probe housings
  • Non-standard resistance values and tolerances


  • Interchangeability accuracy of ±0.5°C (0°C to +70°C)
  • Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
  • Dissipation constant: 1 mw/°C
  • Maximum power rating: 30 mw at 25°C derated to 1 mW at 125°C
  • Operating temperature range: -80°C to +150°C
  • Storage and operation temperatures for best long-term stability: -80° to +120°C

Access specifications, certifications, check availability and order parts below

Catalog #Resis Ω @ 25°CR-T CurveBeta (K) 0-50°COperating TemperatureEngineering DrawingRT TableCompare
PW102E31000E3263-80° to 150°CEngineeringRT
PW102J21000J3892-80° to 150°CEngineeringRT
PW103G210000G3575-80° to 150°CEngineeringRT
PW103J210000J3892-80° to 150°CEngineeringRT
PW104J2100000J3892-80° to 150°CEngineeringRT
PW104R2100000R4140-80° to 150°CEngineeringRT
PW203J220000J3892-80° to 150°CEngineeringRT
PW222J22252J3892-80° to 150°CEngineeringRT
PW302J23000J3892-80° to 150°CEngineeringRT
PW303J230000J3892-80° to 150°CEngineeringRT
PW502J25000J3892-80° to 150°CEngineeringRT
PW503J250000J3892-80° to 150°CEngineeringRT
PW503R250000R4140-80° to 150°CEngineeringRT
PW602J26000J3892-80° to 150°CEngineeringRT
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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.

pdficon Littelfuse Leaded Thermistors Precision - PW Datasheet