Curve Tracking and Point Matched
Vishay Dale
NTC Thermistors
Curve Tracking Thermistors are “curve matched” to desired
temperature tolerances over selected temperature ranges.
They allow component standardization and can reduce cost
associated with assembly because they are curve tracking to
within the tolerance and temperature range specified without
re-calibration. They are ideally suited for use in
microcomputer measurement and control circuits. The
temperature tolerance corresponds to a resistance
tolerance based on the temperature coefficient at each
temperature point within the specified range. Standard
temperature tolerance and ranges are listed below, along with
the available styles and resistances.
To specify, add the appropriate suffix from the following table
to the part number.
Example:
1M1002-B3 = Curve 1, 10 kilohms at + 25°C,
curve tracking to
±
0.5°C from 0° to + 70°C.
STANDARD ELECTRICAL SPECIFICATIONS
Temp. Range
Temp. Tolerance
Curve
Number
Part Number Suffix
R
25
(
Ω
)*
2252
3000
5000
1
10,000
20,000
30,000
2
1000
30,000
4
50,000
100,000
30,000
8
50,000
100,000
10,000
9
20,000
M
X
X
X
X
X
X
X
X
X
M, T
M, T
M
M
M, T
M, T
M, T
M, T
M, T
M, T
M, T
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Models
M, T
C, T
M, T
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
°
C to + 70
°
C
- 20
°
C to + 50
°
C
0
°
C to + 100
°
C
- A4
- B4
- C4
+ 25
°
C to + 90
°
C
- A5
- B5
- C5
0
°
C to + 50
°
C
- A8
- B8
- C8
±
1
°
C
±
0.5
°
C
±
0.2
°
C
- A3
- B3
- C3
±
1
°
C
- A2
±
1
°
C
±
0.5
°
C
±
0.2
°
C
±
1
°
C
±
0.5
°
C
±
0.2
°
C
±
1
°
C
±
0.5
°
C
±
0.2
°
C
X = Available. Popular Values - contact factory for other values.
* = Standard R25 Values (+ 25°C resistance).
Point Matched Thermistors are available for applications
which require a specific resistance value matched to a
specific temperature point. (Example: 10,000 ohms
±
2%
at + 80°C.) They are useful for applications which require
temperature monitoring at a critical temperature point
Document Number 33005
Revision 10-May-00
to control, measure or shutdown. Consult factory with
requirements.
NOTE:
All thermistors listed in this catalog are point matched
thermistors at + 25°C.
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