DISCRETE SEMICONDUCTORS
DATA SHEET
book, halfpage
M3D239
KTY81-1 series
Silicon temperature sensors
Product specification
Supersedes data of 1998 Mar 26
2000 Aug 25
Philips Semiconductors
Product specification
Silicon temperature sensors
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.
MARKING
TYPE NUMBER
KTY81-110
KTY81-120
KTY81-121
KTY81-122
KTY81-150
KTY81-151
KTY81-152
QUICK REFERENCE DATA
SYMBOL
R
25
PARAMETER
sensor resistance
KTY81-110
KTY81-120
KTY81-121
KTY81-122
KTY81-150
KTY81-151
KTY81-152
T
amb
ambient operating
temperature
CONDITIONS
T
amb
= 25
°C;
I
cont
= 1 mA
990
980
980
1000
950
950
1000
−55
MIN.
CODE
110
120
121
122
150
151
152
handbook, halfpage
KTY81-1 series
PINNING
PIN
1
2
3
DESCRIPTION
electrical contact
electrical contact
not to be connected to a potential
1
3
2
MBH739
Fig.1 Simplified outline (SOD70).
MAX.
1010
1020
1000
1020
1050
1000
1050
+150
Ω
Ω
Ω
Ω
Ω
Ω
Ω
°C
UNIT
2000 Aug 25
2
Philips Semiconductors
Product specification
Silicon temperature sensors
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL
I
cont
T
amb
PARAMETER
continuous sensor current
ambient operating temperature
CONDITIONS
in free air; T
amb
= 25
°C
in free air; T
amb
= 150
°C
−
−
−55
KTY81-1 series
MIN.
2
MAX.
10
+150
UNIT
mA
mA
°C
CHARACTERISTICS
T
amb
= 25
°C,
in liquid, unless otherwise specified.
SYMBOL
R
25
PARAMETER
sensor resistance
KTY81-110
KTY81-120
KTY81-121
KTY81-122
KTY81-150
KTY81-151
KTY81-152
TC
R
100
/R
25
R
−55
/R
25
τ
temperature coefficient
resistance ratio
resistance ratio
thermal time constant; note 1
CONDITIONS
I
cont
= 1 mA
990
980
980
1000
950
950
1000
−
T
amb
= 100
°C
and 25
°C
1.676
T
amb
=
−55 °C
and 25
°C
0.480
in still air
in still liquid; note 2
in flowing liquid; note 2
rated temperature range
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.
−
−
−
−55
−
−
−
−
−
−
−
0.79
1.696
0.490
30
5
3
−
1010
1020
1000
1020
1050
1000
1050
−
1.716
0.500
−
−
−
+150
s
s
s
°C
Ω
Ω
Ω
Ω
Ω
Ω
Ω
%/K
MIN.
TYP.
MAX.
UNIT
2000 Aug 25
3
Philips Semiconductors
Product specification
Silicon temperature sensors
Table 1
KTY81-1 series
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
RESISTANCE
(Ω)
MIN.
−55
−50
−40
−30
−20
−10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
125
130
140
150
−67
−58
−40
−22
−4
14
32
50
68
77
86
104
122
140
158
176
194
212
230
248
257
266
284
302
0.99
0.98
0.96
0.93
0.91
0.88
0.85
0.83
0.80
0.79
0.78
0.75
0.73
0.71
0.69
0.67
0.65
0.63
0.61
0.58
0.55
0.52
0.45
0.35
475
500
552
609
669
733
802
874
950
990
1029
1108
1192
1278
1369
1462
1559
1659
1762
1867
1919
1970
2065
2145
TYP.
490
515
567
624
684
747
815
886
961
1000
1040
1122
1209
1299
1392
1490
1591
1696
1805
1915
1970
2023
2124
2211
MAX.
505
530
582
638
698
761
828
898
972
1010
1051
1136
1225
1319
1416
1518
1623
1733
1847
1963
2020
2077
2184
2277
TEMP.
ERROR
(K)
±3.02
±2.92
±2.74
±2.55
±2.35
±2.14
±1.91
±1.67
±1.41
±1.27
±1.39
±1.64
±1.91
±2.19
±2.49
±2.8
±3.12
±3.46
±3.83
±4.33
±4.66
±5.07
±6.28
±8.55
KTY81-120
RESISTANCE
(Ω)
MIN.
470
495
547
603
662
726
793
865
941
980
1018
1097
1180
1265
1355
1447
1543
1642
1744
1848
1899
1950
2043
2123
TYP.
490
515
567
624
684
747
815
886
961
1000
1040
1122
1209
1299
1392
1490
1591
1696
1805
1915
1970
2023
2124
2211
MAX.
510
535
588
645
705
769
836
907
982
1020
1061
1147
1237
1332
1430
1532
1639
1750
1865
1982
2040
2097
2205
2299
TEMP.
ERROR
(K)
±4.02
±3.94
±3.78
±3.62
±3.45
±3.27
±3.08
±2.88
±2.66
±2.54
±2.68
±2.97
±3.28
±3.61
±3.94
±4.3
±4.66
±5.05
±5.48
±6.07
±6.47
±6.98
±8.51
±11.43
(°C)
(°F)
(%/K)
2000 Aug 25
4
Philips Semiconductors
Product specification
Silicon temperature sensors
Table 2
KTY81-1 series
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
RESISTANCE
(Ω)
MIN.
−55
−50
−40
−30
−20
−10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
125
130
140
150
−67
−58
−40
−22
−4
14
32
50
68
77
86
104
122
140
158
176
194
212
230
248
257
266
284
302
0.99
0.98
0.96
0.93
0.91
0.88
0.85
0.83
0.80
0.79
0.78
0.75
0.73
0.71
0.69
0.67
0.65
0.63
0.61
0.58
0.55
0.52
0.45
0.35
471
495
547
603
662
726
794
865
941
980
1018
1097
1180
1266
1355
1447
1543
1642
1745
1849
1900
1950
2044
2124
TYP.
485
510
562
617
677
740
807
877
951
990
1029
1111
1196
1286
1378
1475
1575
1679
1786
1896
1950
2003
2103
2189
MAX.
500
524
576
632
691
754
820
889
962
1000
1041
1125
1213
1305
1402
1502
1607
1716
1828
1943
2000
2056
2162
2254
TEMP.
ERROR
(K)
±3.02
±2.92
±2.74
±2.55
±2.35
±2.14
±1.91
±1.67
±1.41
±1.27
±1.39
±1.64
±1.91
±2.19
±2.49
±2.8
±3.12
±3.46
±3.83
±4.33
±4.66
±5.07
±6.28
±8.55
KTY81-122
RESISTANCE
(Ω)
MIN.
480
505
558
615
676
741
810
883
960
1000
1039
1120
1204
1291
1382
1477
1574
1676
1780
1886
1938
1989
2 085
2167
TYP.
495
520
573
630
690
755
823
895
971
1010
1050
1134
1221
1312
1406
1505
1607
1713
1823
1934
1989
2044
2146
2233
MAX.
510
535
588
645
705
769
836
907
982
1020
1062
1148
1238
1332
1430
1533
1639
1750
1865
1982
2041
2098
2206
2299
TEMP.
ERROR
(K)
±3.02
±2.92
±2.74
±2.55
±2.35
±2.14
±1.91
±1.67
±1.41
±1.27
±1.39
±1.64
±1.91
±2.19
±2.49
±2.8
±3.12
±3.46
±3.83
±4.33
±4.66
±5.07
±6.28
±8.55
(°C)
(°F)
(%/K)
2000 Aug 25
5
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