1littelfuse.com
© 2018 Littelfuse, Inc. Revised: February 26, 2018
Specifications are subject to change without notice.
Description
Littelfuse low cost interchangeable glass encapsulated thermistors
are manufactured using super stable, precision NTC 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. They are well suited for uses where their
interchangeability eliminates the necessity for costly individual
circuit calibration. Their uniform dimensions and axial lead
configuration make them especially suitable for use with automatic
insertion equipment.
Dimensions
Dimensions shown in inches.
JL Series DO-35 Interchangeable Glass Encapsulated Thermistors
Glass Encapsulated Thermistor
Leaded Thermistors
Features
• High temperature
capability to +300°C
• Hermetically sealed
glass package
• Low cost
• Excellent long-term
stability
• High Voltage Insulation
• Tinned CSS Lead
Wires are Solderable
or Weldable
Options
• Special Lead Forms
• Non-standard
resistance values
and tolerances
• Point matched at
specified temperatures
• Tape and Reel
Packaging
0.160"
MAX
GLASS ENCAPSULATED THERMISTORS
0.075" MAX
24 AWG (0.020" ± 0.002" DIA)
TINNED CCS, 1.0" LONG MIN
GLASS BODY
B
C
0.160"
MAX
0.075"
MAX
A
GLASS
BODY
0.020" ± 0.002"
24 AWG TINNED CCS
1.0" LONG MIN
A B C
A B C
0.020”±0.002”
24 AWG Tinned CCS
1.0” Long Min
0.075”
Max
0.160”
Max
Part Numbering System
Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details.
10 3 J L 1A
No Significance
Multiplier, power of 10
Ex. 103 = 10 Ω x 103 = 10,000 Ω
Resistance @ 25ºC
Base Value
Accuracy
R-T Curve
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each
product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at:
www.littelfuse.com/disclaimer-electronics
2littelfuse.com
© 2018 Littelfuse, Inc. Revised: February 26, 2018
Specifications are subject to change without notice.
Glass Encapsulated Thermistor
Leaded Thermistors
Specifications
Part
Number
Resistance
Ohms
@25°C
Accuracy
(0°C to
+100°C)
R-T
Curve
Temperature
Coefficient
(%/°C) @ 25°C
Beta (K)
0-50°C
Dissipation
Constant,
Nominal
(mW/°C)
Thermal
Time
Constant,
Max. -
Still Air
(seconds)
Thermal
Time
Constant,
Max. - Well
Stirred Oil
(seconds)
Temperature
Rating
(°C)
103JL1A 10000 ± 0.5 °C J-4.4 3892 2 5 0.5 -55 to +300
203JL1A 20000 ± 0.5 °C J-4.4 3892 2 5 0.5 -55 to +300
253JL1A 25000 ± 0.5 °C J-4.4 3892 2 5 0.5 -55 to +300
503JL1A 50000 ± 0.5 °C J-4.4 3892 2 5 0.5 -55 to +300
104JL1A 100000 ± 0.5 °C J-4.4 3892 2 5 0.5 -55 to +300
Packaging
Packaging Option Packaging Code Standard Quantity Standard
Tape and Reel -TR 5000 EIA-296
