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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