DO-35 Standard Series - Glass Encapsulated Thermistors (300°C)

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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 low cost glass encapsulated thermistors are manufactured using super stable chips which are hermetically sealed in a glass (DO-35 diode style) 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 and axial lead configuration make them especially suitable for use with automatic insertion equipment.


  • High temperature capability to +300°C
  • Hermetically sealed glass package
  • Low cost
  • Excellent long-term stability
  • High voltage insulation
  • Tinned CCS lead wires are solderable or weldable


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


  • Thermal time constant: 5 seconds (still air)
  • Thermal time constant: 0.5 seconds (stirred liquid)
  • Dissipation constant: 2 mW/°C (still air)

Access specifications, certifications, check availability and order parts below

Catalog #Resis Ω @ 25°CResis Tol ± % @25°CR-T CurveBeta (K) 0-50°CBeta (K) 25-85°COperating TemperatureEngineering DrawingRT TableSamplesCompare
102BG1J10005B2941-55° to 220°CEngineeringRTOrder
102EG1K100010E3263-55° to 220°CEngineeringRTOrder
102PS1G10002-55° to 150°CEngineeringRTOrder
102PS1J10005-55° to 150°CEngineeringRTOrder
103E1G1F100001E133203435-55° to 250°CEngineeringRT
103E1G1K1000010E13320-55° to 300°CEngineeringRT
103FG1K1000010F3419-55° to 300°CEngineeringRTOrder
103GG1K1000010G3575-55° to 300°CEngineeringRT
103JG1F100001J3892-55° to 300°CEngineeringRTOrder
103JG1G100002J3892-55° to 300°CEngineeringRTOrder
103JG1J100005J3892-55° to 300°CEngineeringRTOrder
103JG1K1000010J3892-55° to 300°CEngineeringRTOrder
103JG1KE1000010J3892-55° to 300°CEngineeringRT
104JG1F1000001J3892-55° to 300°CEngineeringRTOrder
104JG1H1000003J3892-55° to 300°CEngineeringRTOrder
104JG1J1000005J3892-55° to 300°CEngineeringRTOrder
104JG1K10000010J3892-55° to 300°CEngineeringRTOrder
104LG2K10000010L139204040-55° to 300°CEngineeringRT
104N1G1K10000010N13991-55° to 300°CEngineeringRT
104RG1J1000005R4140-55° to 300°CEngineeringRTOrder
104RG1K10000010R4140-55° to 300°CEngineeringRT
105RG1J10000005R4140-55° to 300°CEngineeringRT
105RG1K100000010R4140-55° to 300°CEngineeringRT
105V3G1K100000010V34369-55° to 300°CEngineeringRT
123GG1K1200010G3575-55° to 300°CEngineeringRT
124JG1K12000010J3892-55° to 300°CEngineeringRT
153JG1K1500010J3892-55° to 300°CEngineeringRTOrder
154JG1K15000010J3892-55° to 300°CEngineeringRTOrder
162PS1J16005-55° to 150°CEngineeringRT
182FG1K180010F3419-55° to 300°CEngineeringRT
202FG1J20005F3419-55° to 300°CEngineeringRT
202FG1K200010F3419-55° to 300°CEngineeringRTOrder
202PS1J20005-55° to 150°CEngineeringRTOrder
203JG1F200001J3892-55° to 300°CEngineeringRT
203JG1J200005J3892-55° to 300°CEngineeringRTOrder
203JG1K2000010J3892-55° to 300°CEngineeringRTOrder
204JG1K20000010J3892-55° to 300°CEngineeringRTOrder
205RG1K200000010R4140-55° to 300°CEngineeringRT
205V4G1K200000010V44288-55° to 300°CEngineeringRT
222E1G1K218610E13320-55° to 300°CEngineeringRT
224JG1K22000010J3892-55° to 300°CEngineeringRT
234RG1G2300002R4140-55° to 300°CEngineeringRT
252BG1K250010B2941-55° to 220°CEngineeringRTOrder
252FG1J25005F3419-55° to 300°CEngineeringRTOrder
253JG1F250001J3892-55° to 300°CEngineeringRTOrder
253JG1K2500010J3892-55° to 300°CEngineeringRTOrder
254JG1J2500005J3892-55° to 300°CEngineeringRTOrder
303JG1F300001J3892-55° to 300°CEngineeringRTOrder
303JG1J300005J3892-55° to 300°CEngineeringRTOrder
304JG1K30000010J3892-55° to 300°CEngineeringRT
332FG1K330010F3419-55° to 300°CEngineeringRT
334RG1K33000010R41404263-55° to 300°CEngineeringRT
375Y1G2K370000010Y145844800-55° to 300°CEngineeringRT
402FG4K400010F1334533540-55° to 300°CEngineeringRT
403GG1K4000010G3575-55° to 300°CEngineeringRT
501BG1J5005B2941-55° to 220°CEngineeringRTOrder
501BG1K50010B2941-55° to 220°CEngineeringRTOrder
502E1G1K500010E13320-55° to 300°CEngineeringRT
502FG1J50005F3419-55° to 300°CEngineeringRTOrder
502FG1K500010F3419-55° to 300°CEngineeringRTOrder
502JG1K500010J3892-55° to 300°CEngineeringRTOrder
503JG1F500001J3892-55° to 300°CEngineeringRTOrder
503JG1J500005J3892-55° to 300°CEngineeringRTOrder
503JG1K5000010J3892-55° to 300°CEngineeringRTOrder
504RG1J5000005R4140-55° to 300°CEngineeringRTOrder
504RG1K50000010R4140-55° to 300°CEngineeringRTOrder
505YG7K500000010Y4640-55° to 300°CEngineeringRT
682JG1K680010J3892-55° to 300°CEngineeringRT
683N1G1K6800010N13991-55° to 300°CEngineeringRT
822JG1K820010J3892-55° to 300°CEngineeringRT
Obsolete: 2018 -11-27
100010B2941-55° to 220°CEngineeringRT
Obsolete: 2019 -11-29
1200010J3892-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
250010F3419-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
25000010J3892-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
280010F3419-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
300010F3419-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
300010J3892-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
3000010H3810-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
3000010J3892-55° to 300°CEngineeringRT
Obsolete: 2019 -11-29
7500010J3892-55° to 300°CEngineeringRT
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
102PS1G PTC THERMISTOR, U.S. RoHS No 05/06/2020 PbFree No 05/06/2020 CoC_RoHS9_102PS1G REACH205_Declaration_102PS1G Yes
Does not Contain
102PS1J THERMISTOR, US SENSOR RoHS No 06/26/2019 PbFree No 06/26/2019 CoC_RoHS9_102PS1J REACH201_Declaration_102PS1J Yes
Does not Contain
103JG1F LEVEL 3 PPAP REQUIRED, US SENS RoHS No 07/16/2020 PbFree No 07/16/2020 CoC_RoHS9_103JG1F REACH209_Declaration_103JG1F Yes
Does not Contain
103JG1G THERMISTOR, U.S. SENSOR RoHS No 05/07/2020 PbFree No 05/07/2020 CoC_RoHS9_103JG1G Yes
103JG1J THERMISTOR, US SENSOR P/ RoHS No 09/11/2019 PbFree No 09/11/2019 CoC_RoHS9_103JG1J REACH201_Declaration_103JG1J Yes
Does not Contain
501BG1J THERMISTOR, US SENSOR RoHS No 02/13/2019 PbFree No
501BG1K THERMISTOR, US SENSOR P/ RoHS No 02/13/2019 PbFree No
502E1G1K THERMSITOR, US SENSOR RoHS No 02/13/2019 PbFree No
502FG1J THERMISTOR, US SENSOR P/ RoHS No 02/13/2019 PbFree No
502FG1K THERMISTOR, U.S. SENSOR RoHS No 02/13/2019 PbFree No
502JG1K THERMSITOR, US SENSOR RoHS No 02/13/2019 PbFree No
503JG1F THERMISTOR, US SENSOR P/ RoHS No 02/13/2019 PbFree No
503JG1J THERMISTOR, US SENSOR P/ RoHS No 02/13/2019 PbFree No
503JG1K THERMISTOR, U.S. SENSOR RoHS No 02/13/2019 PbFree No
504RG1J THERMISTOR, U.S. SENSOR RoHS No 02/13/2019 PbFree No
504RG1K THERMISTOR, U.S. SENS RoHS No 02/13/2019 PbFree No
505YG7K THERMISTOR, US SENSOR RoHS No 02/13/2019 PbFree No
682JG1K NTC THERMISTOR 6.8K OHM 10% DO35 RoHS No 02/22/2019 PbFree No Yes
683N1G1K NTC THERMISTOR 68K OHM 10% DO35 RoHS No 02/22/2019 PbFree No Yes
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