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Thermostat Stainless Steel NTC Thermistor Temperature Sensor 1.204K 3966 For Bosch Siemens Washing Machine Dishwasher
Anatomical drawing (mm)
| NO | COMPONENT | MATERIAL AND SPECIFICATIONS | MARK |
| 2-1. | THERMISTOR |
MFB482X3950FB (R60=1.204KΩ±2% B25/85=3966K±1.5%) |
|
| 2-2. | CAP | 10.0X14.5X30.5 Expanded stainless steel shell (DES1410001 A-0) | SUS304 |
| 2-3. | EPOXY FILLING | G-308:GU-308:G-008X Black | |
| 2-4. | TERMINAL | 6.3 Type PBTB Connect socket Black | PBTB |
Feature
Stainless steel is humid and corrosion resistant, and is mainly used in household cleaning appliances. In addition, voltage withstand standard is increased, and voltage of the sensor ranges from 1500V to 3750V.
Application
The sensor is mainly used in washing machine, clothes dryer, all-in-one washer and dryer, etc.
| Number | Item | Symbol | Test Conditions | Min. | Nor. | Max. | Unit |
| 4-1. | Resistance At 0℃ | R0 |
Ta=0±0.05℃ PT≦0.1mw |
15.031 | 15.768 | 16.505 | kΩ |
| 4-2. | Resistance At 25℃ | R25 |
Ta=25±0.05℃ PT≦0.1mw |
4.661 | 4.828 | 4.995 | kΩ |
| 4-3. | Resistance At 30℃ | R30 |
Ta=30±0.05℃ PT≦0.1mw |
3.764 | 3.89 | 4.016 | kΩ |
| 4-4. | Resistance At 40℃ | R40 |
Ta=40±0.05℃ PT≦0.1mw |
2.5 | 2.573 | 2.645 | kΩ |
| 4-5. | Resistance At 60℃ | R60 |
Ta=60±0.05℃ PT≦0.1mw |
1.18 | 1.204 | 1.228 | kΩ |
| 4-6. | Resistance At 83℃ | R83 |
Ta=83±0.05℃ PT≦0.1mw |
0.538 | 0.554 | 0.569 | kΩ |
| 4-7. | Resistance At 85℃ | R85 |
Ta=85±0.05℃ PT≦0.1mw |
/ | 0.52 | ||
| 4-8. | B Value | B25/85 | 3906.5 | 3966 | 4025.5 | k | |
| 4-9. | Thermal Dissipation Constant | δ | T1=85±0.2℃,Ta=25±1℃ | / | 5.0 | / | mw/℃ |
| 4-10. | Response Time | τ |
T1=47.1±0.2℃, T2=85±0.2℃ Ta=25±1℃ |
/ | 16 | / | sec |
| 4-11. | Insulation test | / | 500VDC 1Sec | 100 | / | / | MΩ |
| 4-12. | Hi-Pot Test | / | AC3750V 1Sec | / | / | 0.5 | Sec |
| 4-13. | Product Working Temp.Range | / | / | -20 | / | +130 | ℃ |
| 4-14. | Max Power rating at 25℃ | / | 200 | / | / | / | mW |
How a NTC Sensor works on a washing machine
The temperature is controlled by the PCB by means of a NTC temperature sensor incorporated in the heating
element when you test it the Resistance drops as the temperature rises.
What is an NTC Sensor?
A thermistor is essentially a resistor that changes its electrical resistance at varying temperatures. The name is derived from a mix of thermal and resistor. They are used in washing machines Because their electrical resistance at various temperatures is known, it’s easy for the washing machine to monitor a thermistor and detect when certain temperatures are reached.
Check all connections first to the sensor and to the board they may have come loose, you are sometimes unlikely to see anything physically wrong but there might be a bad connection. Diagnosis is done by measuring the resistance with a continuity (or multi) meter. We can’t give readings for all thermistors because they vary, see my picture for an example, but you should be able to get a reading across both terminals. If it’s completely open circuit it’s likely to be faulty.
