Leaded Thermistors
Interchangeable Thermistor
KT Series Standard 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
B
A
• High accuracy
• Fast thermal response
• Low cost
• Small size
KYNAR
INSULATED WIRE
C
• Epoxy encapsulated
• High stability
• Long life
• R/T Curve-matched
Part Numbering System
D
KT 10 2 J 2
Dimensions shown in inches.
A
A
0.250”
Nom
B
0.250"
NOM
B
C
30 AWG
(0.010")
0.095"
MAX
30 AWG
0.010”
Series
D
C
1.5"
±0.250"
0.095”
Max
Resistance @ 25ºC
Base Value
D
1.5”
±0.250”
No Significance
R-T Curve
Multiplier, power of 10
Ex. 102 = 10 Ω x 102 = 1,000 Ω
“KS” & “KT” SERIES
0.250"
NOM
30 AWG (0.010") KYNAR
INSULATED WIRE
Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details.
EPOXY
COATING
0.095"
MAX
1.5" .250"
© 2021 Littelfuse, Inc. Revised: April 15, 2021
Specifications are subject to change without notice.
1
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Leaded Thermistors
Interchangeable Thermistor
KT Series Standard Precision Interchangeable Thermistors
Specifications
Part
Number
Resistance Accuracy
Ohms
(±°C)
@25°C
0-70°C
Temperature
R-T
Coefficient
Curve
(% / °C)
@ 25°C
Thermal
Dissipation
Time
Beta (K) Constant,
Constant,
0-50°C
Nominal
Max. - Still
(mW/°C)
Air
(seconds)
Thermal
Time
Temperature
Constant,
Range
Max. - Well
(°C)
Stirred Oil
(seconds)
Storage &
Operation
Temp for Best
L/T Stability
(°C)
KT102J2
1000
±0.2°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT222J2
2252
±0.2°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT302J2
3000
±0.2°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT502J2
5000
±0.2°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT602J2
6000
±0.2°C
J
-4.4
4140
1
10
1
-80 to +150
-80 to +75
KT602J2
6000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT103G2
10000
±0.2°C
G
-4.04
3575
1
10
1
-80 to +150
-80 to +75
KT103J2
10000
±0.2°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT203J2
20000
±0.2°C
J
-4.4
4140
1
10
1
-80 to +150
-80 to +75
KT303J2
30000
±0.2°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT503J2
50000
±0.2°C
J
-4.4
3892
1
10
1
-80 to +150
-80 to +75
KT503R2
50000
±0.2°C
R
-4.68
3892
1
10
1
-80 to +150
-80 to +75
KT104R2
100000
±0.2°C
R
-4.68
3892
1
10
1
-80 to +150
-80 to +75
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
© 2021 Littelfuse, Inc. Revised: April 15, 2021
Specifications are subject to change without notice.
2
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