Leaded Thermistors
Interchangeable Thermistor
PR Series Ultra Precision Interchangeable Thermistors
Description
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.
Options
• Non-standard
• Special encapsulants or
probe housings
resistance values
and tolerances
• Special lead materials
and lengths
Features
Dimensions
EPOXY
COATING
A
TINNED COPPER
ALLOY WIRE
• Fast thermal response
• Long life
• Small size
• R/T Curve-matched
Part Numbering System
C
PR 10 3 J 2
Dimensions shown in inches.A
30AWG
0.010”
• High stability
• Epoxy encapsulated
B
A
• High accuracy
B30 AWG
(0.010")
0.095”
Max
B
Series
C
Resistance @ 25ºC
Base Value
0.095" C 1.5"
MAX
Min
1.5”
Min
R-T Curve
Multiplier, power of 10
Ex. 103 = 10 Ω x 103 = 10,000 Ω
Ultra Precision PR Series
30 AWG (0.010")
TINNED ALLOY WIRE
No Significance
Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details.
EPOXY
COATING
0.095"
MAX
1.5"
MIN
© 2018 Littelfuse, Inc. Revised: February 26, 2018
Specifications are subject to change without notice.
1
littelfuse.com
Leaded Thermistors
Interchangeable Thermistor
PR Series Ultra Precision Interchangeable Thermistors
Specifications
Part
Number
Resistance Accuracy
Ohms
(±°C)
@25°C
0-50°C
Temperature
R-T
Coefficient
Curve
(% / °C)
@ 25°C
Beta (K)
0-50°C
Max.
Dissipation
Power
Constant,
Rating
Nominal
(mW)
(mW/°C)
Thermal
Time
Constant,
Max. - Still
Air
(seconds)
Thermal
Time
Constant,
Max. - Well
Stirred Oil
(seconds)
Temprature
Rating
(°C)
Storage &
Operation
Temp for Best
L/T Stability
(°C)
PR222J2
2252
± 0.05°C
J
-4.4
3892
30
1
10
1
-55 to +80
-55 to +50
PR302J2
3000
± 0.05°C
J
-4.4
3892
30
1
10
1
-55 to +80
-55 to +50
PR502J2
5000
± 0.05°C
J
-4.4
3892
30
1
10
1
-55 to +80
-55 to +50
PR103J2
10000
± 0.05°C
J
-4.4
3892
30
1
10
1
-55 to +80
-55 to +50
PR203J2
20000
± 0.05°C
J
-4.4
3892
30
1
10
1
-55 to +80
-55 to +50
PR303J2
30000
± 0.05°C
J
-4.4
3892
30
1
10
1
-55 to +80
-55 to +50
PR503J2
50000
± 0.05°C
J
-4.4
3892
30
1
10
1
-55 to +80
-55 to +50
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
© 2018 Littelfuse, Inc. Revised: February 26, 2018
Specifications are subject to change without notice.
2
littelfuse.com
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