KTY81-2SERIES_4
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DATA SHEET
Product specification
Supersedes data of 1998 Mar 26
2000 Aug 25
DISCRETE SEMICONDUCTORS
KTY81-2 seriesSilicon temperature sensors
ook, halfpage
M3D239
2000 Aug 25
2
Philips Semiconductors
Product specification
Silicon temperature sensors
KTY81-2 series
DESCRIPTION
The temperature sensors in the KTY81-2 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
KTY81-210
210
KTY81-220
220
KTY81-221
221
KTY81-222
222
KTY81-250
250
KTY81-251
251
KTY81-252
252
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
R25
sensor resistance
Tamb = 25 °C; Icont = 1 mA
KTY81-210
1980
2020
Ω
KTY81-220
1960
2040
Ω
KTY81-221
1960
2000
Ω
KTY81-222
2000
2040
Ω
KTY81-250
1900
2100
Ω
KTY81-251
1900
2000
Ω
KTY81-252
2000
2100
Ω
Tamb
ambient operating
temperature
−55
+150
°C
2000 Aug 25
3
Philips Semiconductors
Product specification
Silicon temperature sensors
KTY81-2 series
LIMITING VALUESIn accordance with the Absolute Maximum Rating System (IEC 60134).
CHARACTERISTICSTamb = 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 72.4 °C is the thermal time constant.
2. Inert liquid, e.g. FC43 manufactured by the 3M company.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
Icont
continuous sensor current
in free air; Tamb = 25 °C
−
10
mA
in free air; Tamb = 150 °C
−
2
mA
Tamb
ambient operating temperature
−55
+150
°C
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
R25
sensor resistance
Icont = 1 mA
KTY81-210
1980
−
2020
Ω
KTY81-220
1960
−
2040
Ω
KTY81-221
1960
−
2000
Ω
KTY81-222
2000
−
2040
Ω
KTY81-250
1900
−
2100
Ω
KTY81-251
1900
−
2000
Ω
KTY81-252
2000
−
2100
Ω
TC
temperature coefficient
−
0.79
−
%/K
R100/R25
resistance ratio
Tamb = 100 °C and 25 °C 1.676
1.696
1.716
R−55/R25
resistance ratio
Tamb = −55 °C and 25 °C 0.480
0.490
0.500
τ
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
2000 Aug 25
4
Philips Semiconductors