Design and function
2015-09-07 / DIS 113_58300000171499_ara_en_c Copyright by BSH Hausgeräte GmbH Page 13 of 65
3.5 NTC
3.5.1 Structure
Graphic 4: Components of the NTC
1 Electrical connection 3 Semi-conductor resistor
2 Connecting cables 4 Housing
The NTC is an electrical component. The housing (4) encloses the semi-conductor
resistor (1) and the connecting cables (2). Semi-conductor resistor and housing
touch each other.
The electrical connection (1) of the NTC is designed as a plug or socket.
3.5.2 Function
NTC resistors are conductive materials with a negative temperature coefficient
(Negative Temperature Coefficient = NTC). As the temperature rises, the electrical
resistance of the NTC drops.
Graphic 5: The function of the NTC
The NTC converts the temperature to electrical resistance. The electronics
evaluate the resistance of the NTC and actuate a switching process if a specified
setpoint temperature is exceeded or drops below the minimum.
3.5.3 Positions of the NTCs
NTC B21 Temperature sensor- end
shield
optional
NTC B31 (a,b) Temperature sensor-
compressor
Optional
NTC B33 Temperature sensor- re-
fresher
optional
Table 5: NTC
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