Semiconductor based temperature sensors
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Semiconductor Based Temperature Sensors - Motor Protection Thermistors (PTC) - Thermistors (NTC) - Silicon Sensors (KTY) www.ephy-mess.de

1. Notes to the use of the Catalogue Products included in this catalogue represent a general overview of the principally deliverable types of construction and confectioning variations of PTC-, NTC- und KTY- Sensors of EPHY-MESS. At first the individual basic types of construction of the sensors, as well as the technical benchmark figures are presented. An overview of the default deliverable possibilities of confectioning follows. Finally some release devices for the different types of sensors are discussed. The different variations and modifications for one product are separated by the sign...

3. Motor Protection Thermistors (PTC) 3.1 General A Positive Temperature Coefficient thermistor (PTC) is a semiconductor of endowed, polycrystalline barium titanate ceramic, whose electrical resistance rapidly increases when a certain temperature is exceeded. PTC thermistors deliverable by EPHY-MESS are mainly motor protection thermistors according to DIN 44080 – 82, which are set in the winding of electrical motors, generators and transformers. The typical resistance / temperature characteristic of motor protection thermistors is displayed in the following diagram. R(PTC) = f (TPTC) Lg R [...

3.2 Classical Motor Protection Thermistor Type (EPTC / DPTC-SH-xxx) Fig. 2: DPTC-SH-xxx Designation EPTC / DPTC-SH-xxx EPTC = single PTC thermistor DPTC = triplet PTC thermistor SH = shrinkage tube coat xxx = (NAT) nominal response temperature [°C] Construction EPTC-SH-xxx PTC thermistor pill according to DIN 44081 varnish and shrinkage tube insulated with fix connected single strands DPTC-SH-xxx 3 PTC thermistor pills according to DIN 44082 varnish and shrinkage tube insulated with fix connected single strands boarded in series Operating temperature -25°C up to max. 23°C over NAT Tolerance...

Pill size (insulated) Old, former standard pill ø<4mm │ Up-to-date mini pill ø < 3mm Pill insulation T < 160°C => Kynar shrinkage tube T 160°C => PTFE shrinkage tube Response time < 3 sec (dependant on pill size and insulation) Nominal response temperature 60 – 190°C Colour codes TNAT [°C] Colour code 60 WH / GY 70 WH / BN 80 WH / WH 90 GN / GN 100 RD / RD 110 BN / BN 120 GY / GY 130 BU / BU 140 WH / BU 145 WH / BK 150 BK / BK 155 BU / BK 160 BU / RD 170 WH / GN 180 WH / RD 190 BK / GY Tab. 1: Colour code of motor protection PTC thermistors according to DIN 40080 Connection line Single...

Thermistor (NTC) 3.3 General A NTC thermistor is according to DIN 44070 resp. IEC 60593 a temperature dependant semiconductor resistor whose value of resistance decreases with growing temperature. The Negative Temperature Coeffizient (NTC) lies at approx. -2... -6%/K and is therewith approx. ten times bigger as for metals. Therefore thermistors are well suitable for the measurement of temperatures. They consist of manganese, iron, cobalt, nickel, copper and zinc oxide; those are admixed with other oxides for chemical stabilisation. These are prepared to a powdery compound and after addition...

3.4 Thermistors for Temperature Control Type (K227) Fig. 3: Motor protection PTC thermistor type K227, 1,8k Specification NTC-SH, type K227 B57227 K333A, 1,8k Special construction 10 k , technical dates on request ATTENTION: all here mentioned dates refer to the type 1.8 k Construction Thermistor disk with Kynar shrinkage tube insulation and fix connected single strands Pill dimensions (insulated) ømax= 5 mm x 14 mm Application For the thermal control of electrical machines and the temperature measurement inside electrical motors and transformers Temperature range -55...155°C Max. power...

Connection line PTFE single strands Cable section AWG26 Colour code Red / Grey Cable length (standard) 380mm │ 2000mm Characteristic curve 1,E+07 R [Ohm] 1,E+06 1,E+05 1,E+04 1,E+03 1,E+02 -60 -40 -20 0 20 40 60 80 100 120 140 160 180 T [°C] Fig. 4: Characteristic curve NTC K227, 1,8kOhm Confectioning variations 8 ESH/DSH │ SGH │ KH │ AK/ZS │ MH EPHY-MESS Semiconductors REV201205052

4.2 Sensor Production Series 83-1xx and 84-1xx 4.2.1 KTY-Sensor Production Series 83-1xx Fig. 5: Silicon KTY 83-1xx sensor Designation Silicon KTY83-1xx xx = tolerance range (see Tab. 2: ) Construction 1 Silicon sensor in DO-34 housing with axial connection rods Type labelling Printed type number on DO-34 housing Connection labelling (see Tab. 2: ) Black cathode ring Remark: The side of the cathode is marked with a black colour ring. This side has to be connected due to the polarity dependence of the sensor with the negative potential of the measuring appliance. Measuring range...

Tolerance range Type Type labelling Tolerance Tolerance range RN =1000 TN = 25°C KTY83–110 KTY83A ±1% 990... 1010 KTY83-120 KTY83C ±2% 980... 1020 KTY83-121 KTY83D -2% 980... 1000 KTY83-122 KTY83E +2% 1000... 1020 KTY83-150 KTY83H ±5% 950... 1050 KTY83-151 KTY83K -5% 950... 1000 KTY83-152 KTY83N +5% 1000... 1050 Tab. 2: Tolerances of KTY 83-1xx Temperature coefficient 25 0.76%/K Resistance ratio R100 / R25 = 1.67 ±0.02 R55 / R25 = 0.50 ±0.01 Thermal time constant T Inside static air Inside resting water Inside flowing water 20 s 1s 0.5 s Housing / dimensions Diode glass housing DO-34...

4.2.2 KTY Sensor Production Series 84-1xx Fig. 10: Silicon KTY production series 84-1xx Designation Silicon KTY84-1xx xx = tolerance range (see Tab. 3: ) Construction Silicon sensor in DO-34 housing with axial connection rods Type labelling Printed type number on DO-34 housing Connection labelling Black cathode ring (see Tab. 3: ) Remark: The side of the cathode is marked with a black colour ring. This side has to be connected due to the polarity dependence of the sensor with the negative potential of the measuring appliance. Colour code 1 (+) = yellow Measuring range -40 °C...300°C Nominal...