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

Littelfuse Leaded Thermistors DO-35 Standard image
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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 CurveOperating TemperatureEngineering DrawingRT TableCompare
102BG1J10005B-55° to 220°CEngineeringRT
102BG1K100010B-55° to 220°CEngineeringRT
102EG1K100010E-55° to 220°CEngineeringRT
102PS1G10002-55° to 150°CEngineeringRT
102PS1J10005-55° to 150°CEngineeringRT
103E1G1F100001E1-55° to 250°CEngineeringRT
103E1G1K1000010E1-55° to 300°CEngineeringRT
103FG1K1000010F-55° to 300°CEngineeringRT
103GG1K1000010G-55° to 300°CEngineeringRT
103JG1F100001J-55° to 300°CEngineeringRT
103JG1G100002J-55° to 300°CEngineeringRT
103JG1J100005J-55° to 300°CEngineeringRT
103JG1K1000010J-55° to 300°CEngineeringRT
103JG1KE1000010J-55° to 300°CEngineeringRT
104JG1F1000001J-55° to 300°CEngineeringRT
104JG1H1000003J-55° to 300°CEngineeringRT
104JG1J1000005J-55° to 300°CEngineeringRT
104JG1K10000010J-55° to 300°CEngineeringRT
104LG2K10000010L1-55° to 300°CEngineeringRT
104N1G1K10000010N1-55° to 300°CEngineeringRT
104RG1J1000005R-55° to 300°CEngineeringRT
104RG1K10000010R-55° to 300°CEngineeringRT
105RG1J10000005R-55° to 300°CEngineeringRT
105RG1K100000010R-55° to 300°CEngineeringRT
105V3G1K100000010V3-55° to 300°CEngineeringRT
123GG1K1200010G-55° to 300°CEngineeringRT
123JG1K1200010J-55° to 300°CEngineeringRT
124JG1K12000010J-55° to 300°CEngineeringRT
153JG1K1500010J-55° to 300°CEngineeringRT
154JG1K15000010J-55° to 300°CEngineeringRT
162PS1J16005-55° to 150°CEngineeringRT
182FG1K180010F-55° to 300°CEngineeringRT
202FG1J20005F-55° to 300°CEngineeringRT
202FG1K200010F-55° to 300°CEngineeringRT
202PS1J20005-55° to 150°CEngineeringRT
203JG1F200001J-55° to 300°CEngineeringRT
203JG1J200005J-55° to 300°CEngineeringRT
203JG1K2000010J-55° to 300°CEngineeringRT
204JG1K20000010J-55° to 300°CEngineeringRT
205RG1K200000010R-55° to 300°CEngineeringRT
205V4G1K200000010V4-55° to 300°CEngineeringRT
222E1G1K218610E1-55° to 300°CEngineeringRT
224JG1K22000010J-55° to 300°CEngineeringRT
234RG1G2300002R-55° to 300°CEngineeringRT
252BG1K250010B-55° to 220°CEngineeringRT
252FG1J25005F-55° to 300°CEngineeringRT
252FG1K250010F-55° to 300°CEngineeringRT
253JG1F250001J-55° to 300°CEngineeringRT
253JG1K2500010J-55° to 300°CEngineeringRT
254JG1J2500005J-55° to 300°CEngineeringRT
254JG1K25000010J-55° to 300°CEngineeringRT
282FG1K280010F-55° to 300°CEngineeringRT
302FG1K300010F-55° to 300°CEngineeringRT
302JG1K300010J-55° to 300°CEngineeringRT
303HG1K3000010H-55° to 300°CEngineeringRT
303JG1F300001J-55° to 300°CEngineeringRT
303JG1J300005J-55° to 300°CEngineeringRT
303JG1K3000010J-55° to 300°CEngineeringRT
304JG1K30000010J-55° to 300°CEngineeringRT
332FG1K330010F-55° to 300°CEngineeringRT
334RG1K33000010R-55° to 300°CEngineeringRT
375Y1G2K370000010Y1-55° to 300°CEngineeringRT
402FG4K400010F13-55° to 300°CEngineeringRT
403GG1K4000010G-55° to 300°CEngineeringRT
501BG1J5005B-55° to 220°CEngineeringRT
501BG1K50010B-55° to 220°CEngineeringRT
502E1G1K500010E1-55° to 300°CEngineeringRT
502FG1J50005F-55° to 300°CEngineeringRT
502FG1K500010F-55° to 300°CEngineeringRT
502JG1K500010J-55° to 300°CEngineeringRT
503JG1F500001J-55° to 300°CEngineeringRT
503JG1J500005J-55° to 300°CEngineeringRT
503JG1K5000010J-55° to 300°CEngineeringRT
504RG1J5000005R-55° to 300°CEngineeringRT
504RG1K50000010R-55° to 300°CEngineeringRT
505YG7K500000010Y-55° to 300°CEngineeringRT
682JG1K680010J-55° to 300°CEngineeringRT
683N1G1K6800010N1-55° to 300°CEngineeringRT
753JG1K7500010J-55° to 300°CEngineeringRT
822JG1K820010J-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 REACH_SVHC Declaration_502FG1J
Does not Contain
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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pdficon Littelfuse Leaded Thermistors DO-35 Standard Datasheet