Leaded Thermistors
Interchangeable Thermistor
KS 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
KYNAR
INSULATED WIRE
C
• High accuracy
• Epoxy encapsulated
• Fast thermal response
• High stability
• Low cost
• Long life
• Small size
• R/T Curve-matched
Part Numbering System
D
KS 10 2 J 2
Dimensions shown in inches.
A
0.250”
Nom
A
B
B
0.250" 30 AWG
(0.010")
NOM
30 AWG
0.010”
C
C
Series
D
0.095"
1.5"
MAX
±0.250"
0.095”
Max
D
Resistance @ 25ºC
Base Value
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: March 23, 2021
Specifications are subject to change without notice.
1
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Leaded Thermistors
Interchangeable Thermistor
KS Series Standard Precision Interchangeable Thermistors
Specifications
Part
Number
Temperature
Resistance Accuracy
R-T
Coefficient
Ohms
(±°C)
Curve
(% / °C)
@25°C
0-70°C
@ 25°C
Thermal
Dissipation
Time
Beta (K) Constant,
Constant,
0-50°C
Nominal
Max. - Still
(mW/°C)
Air
(seconds)
Thermal
Time
Temperature
Constant,
Rating
Max. - Well
(°C)
Stirred Oil
(seconds)
Storage &
Operation
Temp for Best
L/T Stability
(°C)
KS102J2
1000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS222J2
2252
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS302J2
3000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS502J2
5000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS602J2
6000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS103G2
10000
±0.1°C
G
-4.04
3575
1
10
1
-80 to +135
-80 to +75
KS103J2
10000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS103J34
10000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS203J2
20000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS303J2
30000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS503J2
50000
±0.1°C
J
-4.4
3892
1
10
1
-80 to +135
-80 to +75
KS503R2
50000
±0.1°C
R
-4.68
4140
1
10
1
-80 to +135
-80 to +75
KS104R2
100000
±0.1°C
R
-4.68
4140
1
10
1
-80 to +135
-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: March 23, 2021
Specifications are subject to change without notice.
2
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