DATA SHEET
Product specification
Supersedes data of 1996 Dec 06
File under Discrete Semiconductors, SC17
1998 Mar 26
DISCRETE SEMICONDUCTORS
KTY81-1 series
Silicon temperature sensors
book, halfpage
M3D239
1998 Mar 26
2
Philips Semiconductors
Product specification
Silicon temperature sensors
KTY81-1 series
DESCRIPTION
The temperature sensors in the KTY81-1 series have a
positive temperature coefficient of resistance and are
suitable for use in measurement and control systems. The
sensors are encapsulated in the SOD70 leaded plastic
package.
Tolerances of 0.5% or other special selections are
available on request.
PINNING
PIN
DESCRIPTION
1
electrical contact
2
electrical contact
3
not to be connected to a potential
Fig.1 Simplified outline (SOD70).
handbook, halfpage
MBH739
2
3
1
MARKING
TYPE NUMBER
CODE
KTY81-110
110
KTY81-120
120
KTY81-121
121
KTY81-122
122
KTY81-150
150
KTY81-151
151
KTY81-152
152
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
R
25
sensor resistance
T
amb
= 25
C; I
cont
= 1 mA
KTY81-110
990
1010
KTY81-120
980
1020
KTY81-121
980
1000
KTY81-122
1000
1020
KTY81-150
950
1050
KTY81-151
950
1000
KTY81-152
1000
1050
T
amb
ambient operating
temperature
-
55
+150
C
1998 Mar 26
3
Philips Semiconductors
Product specification
Silicon temperature sensors
KTY81-1 series
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
CHARACTERISTICS
T
amb
= 25
C, in liquid, unless otherwise specified.
Notes
1. The thermal time constant is the time taken for the sensor to reach 63.2% of the total temperature difference. For
example, if a sensor with a temperature of 25
C is moved to an environment with an ambient temperature of 100
C,
the time for the sensor to reach a temperature of 47.4
C is the thermal time constant.
2. Inert liquid, e.g. FC43 manufactured by the 3M company.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
I
cont
continuous sensor current
in free air; T
amb
= 25
C
-
10
mA
in free air; T
amb
= 150
C
-
2
mA
T
amb
ambient operating temperature
-
55
+150
C
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
R
25
sensor resistance
I
cont
= 1 mA
KTY81-110
990
-
1010
KTY81-120
980
-
1020
KTY81-121
980
-
1000
KTY81-122
1000
-
1020
KTY81-150
950
-
1050
KTY81-151
950
-
1000
KTY81-152
1000
-
1050
TC
temperature coefficient
-
0.79
-
%/K
R
100
/R
25
resistance ratio
T
amb
= 100
C and 25
C 1.676
1.696
1.716
R
-
55
/R
25
resistance ratio
T
amb
=
-
55
C and 25
C 0.480
0.490
0.500
thermal time constant; note 1
in still air
-
30
-
s
in still liquid; note 2
-
5
-
s
in flowing liquid; note 2
-
3
-
s
rated temperature range
-
55
-
+150
C
1998 Mar 26
4
Philips Semiconductors
Product specification
Silicon temperature sensors
KTY81-1 series
Table 1
Ambient temperature, corresponding resistance, temperature coefficient and maximum expected temperature
error for KTY81-110 and KTY81-120
I
cont
= 1 mA.
AMBIENT
TEMPERATURE
TEMP.
COEFF.
KTY81-110
KTY81-120
(
C)
(
F)
(%/K)
RESISTANCE
(
)
TEMP.
ERROR
(K)
RESISTANCE
(
)
TEMP.
ERROR
(K)
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
-
55
-
67
0.99
475
490
505
3.02
470
490
510
4.02
-
50
-
58
0.98
500
515
530
2.92
495
515
535
3.94
-
40
-
40
0.96
552
567
582
2.74
547
567
588
3.78
-
30
-
22
0.93
609
624
638
2.55
603
624
645
3.62
-
20
-
4
0.91
669
684
698
2.35
662
684
705
3.45
-
10
14
0.88
733
747
761
2.14
726
747
769
3.27
0
32
0.85
802
815
828
1.91
793
815
836
3.08
10
50
0.83
874
886
898
1.67
865
886
907
2.88
20
68
0.80
950
961
972
1.41
941
961
982
2.66
25
77
0.79
990
1000
1010
1.27
980
1000
1020
2.54
30
86
0.78
1029
1040
1051
1.39
1018
1040
1061
2.68
40
104
0.75
1108
1122
1136
1.64
1097
1122
1147
2.97
50
122
0.73
1192
1209
1225
1.91
1180
1209
1237
3.28
60
140
0.71
1278
1299
1319
2.19
1265
1299
1332
3.61
70
158
0.69
1369
1392
1416
2.49
1355
1392
1430
3.94
80
176
0.67
1462
1490
1518
2.8
1447
1490
1532
4.3
90
194
0.65
1559
1591
1623
3.12
1543
1591
1639
4.66
100
212
0.63
1659
1696
1733
3.46
1642
1696
1750
5.05
110
230
0.61
1762
1805
1847
3.83
1744
1805
1865
5.48
120
248
0.58
1867
1915
1963
4.33
1848
1915
1982
6.07
125
257
0.55
1919
1970
2020
4.66
1899
1970
2040
6.47
130
266
0.52
1970
2023
2077
5.07
1950
2023
2097
6.98
140
284
0.45
2065
2124
2184
6.28
2043
2124
2205
8.51
150
302
0.35
2145
2211
2277
8.55
2123
2211
2299
11.43
1998 Mar 26
5
Philips Semiconductors
Product specification
Silicon temperature sensors
KTY81-1 series
Table 2
Ambient temperature, corresponding resistance, temperature coefficient and maximum expected temperature
error for KTY81-121 and KTY81-122
I
cont
= 1 mA.
AMBIENT
TEMPERATURE
TEMP.
COEFF.
KTY81-121
KTY81-122
(
C)
(
F)
(%/K)
RESISTANCE
(
)
TEMP.
ERROR
(K)
RESISTANCE
(
)
TEMP.
ERROR
(K)
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
-
55
-
67
0.99
471
485
500
3.02
480
495
510
3.02
-
50
-
58
0.98
495
510
524
2.92
505
520
535
2.92
-
40
-
40
0.96
547
562
576
2.74
558
573
588
2.74
-
30
-
22
0.93
603
617
632
2.55
615
630
645
2.55
-
20
-
4
0.91
662
677
691
2.35
676
690
705
2.35
-
10
14
0.88
726
740
754
2.14
741
755
769
2.14
0
32
0.85
794
807
820
1.91
810
823
836
1.91
10
50
0.83
865
877
889
1.67
883
895
907
1.67
20
68
0.80
941
951
962
1.41
960
971
982
1.41
25
77
0.79
980
990
1000
1.27
1000
1010
1020
1.27
30
86
0.78
1018
1029
1041
1.39
1039
1050
1062
1.39
40
104
0.75
1097
1111
1125
1.64
1120
1134
1148
1.64
50
122
0.73
1180
1196
1213
1.91
1204
1221
1238
1.91
60
140
0.71
1266
1286
1305
2.19
1291
1312
1332
2.19
70
158
0.69
1355
1378
1402
2.49
1382
1406
1430
2.49
80
176
0.67
1447
1475
1502
2.8
1477
1505
1533
2.8
90
194
0.65
1543
1575
1607
3.12
1574
1607
1639
3.12
100
212
0.63
1642
1679
1716
3.46
1676
1713
1750
3.46
110
230
0.61
1745
1786
1828
3.83
1780
1823
1865
3.83
120
248
0.58
1849
1896
1943
4.33
1886
1934
1982
4.33
125
257
0.55
1900
1950
2000
4.66
1938
1989
2041
4.66
130
266
0.52
1950
2003
2056
5.07
1989
2044
2098
5.07
140
284
0.45
2044
2103
2162
6.28
2 085
2146
2206
6.28
150
302
0.35
2124
2189
2254
8.55
2167
2233
2299
8.55
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