Custom Made MF57 Leadless Disc Ring NTC Thermistor Chip 516Ohm For
Automotive AEC-Q200 Engine Coolant Temperature Sensor
Features & Benefits
Fully metalized leadless disc
Multiple temperature stability options
Customized solutions ,normally on dimension
,temperature,resistance,tolerance.
High precision.
Excellent consistency and interchangeability
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General
Aolitel leadless disc NTC thermistors offer excellent thermal and
electrical stability with wide range of resistance values
customizable based on material properties and customer
requirements. These parts are ideal for various general purpose and
automotive (AEC-Q200) applications. Available in custom disc sizes
and multiple temperature stability options.
This type of product is widely used in automotive and consumer
applications. They are assembled in custom-probes for sensing the
temperature of liquids (water, oil, ...), gases or surface of any
other component. The metallization covers completely the surfaces
of the thermistor. The particularly flat and smooth surfaces ensure
an excellent electrical and thermal contact under pressure.
Typical Applications
Temperature sens ing and measuring in automobi le cool ing system,
combus tion engine, larger power electric engine, oil transformer
etc . Also applicable for temperature meausing on other occasions.
Ambient temperatur sensing, control and compensation
Liquid or gas temperature contol and monitoring
Assembly into probes
Automotive (air conditioning, temperature monitoring, heated seat,
oil temperature control, others)
Fire detecting systems
Chemical industry
Structure Dimension (mm)
| Code | Tolerance |
| Φ | 6.7～6.9 |
| Φ1 | 3.6～3.8 |
| t | 1.4 ～ 1.6 |
| Pack-bulk | 500/Bag |
Electrical Performances
| NO | Parameter | Symbol | Test Conditions | Min | Nor. | Max. | Unit |
| a. | Resistance At 25℃ | R80 | Ta=25℃±0.1℃ T＜0.5mA | 490.2 | 516 | 541.8 | Ω |
| b. | Resistance At 100℃ | R100 | Ta=100℃±0.1℃ T＜0.5mA | 36.7 | 38.6 | 40.5 | Ω |
| c. | R25/R100 | k | - | - | - | - | - |
| d. | B Constant | B | 8876Log K | 3811 | 3850 | 3880 | k |
Maximum Ratings
| NO | Parameter | Specifcation | Unint |
| a. | Opeation Temperature Range | -40 ～ +160 | ℃ |
| b. | Max. Permissible Current | 100 | mA |
| c. | Max. Operation Current | 10 | mA |
Resistance Vs. Temperature Curve
DESIGN OF THE THERMISTOR
Choice of the resistances If the application is to measure the
temperature around a defined point, a unique nominal resistance can
be chosen (for example, among standard values of the ND range
products presented on pages 20 to 24).
When it is required to measure the temperature over selected ranges
T1 –T2 , T2 –T3 , ..., the corresponding resistance R1 , R2 , R3 ,
..., must be such that they can be located on the R (T)
characteristic of an existing NTC material (for example among
standard materials whose R (T) are displayed on pages 29 to 33).
The resistances must also be compatible with the resistivity of the
material and the dimensions of the thermistor.
Series Catalogue Guidation
| Model | Rated Resistance R25 | B Value (25/50℃) | Rated Power (W) | Measuring Power (mW) | Themal time Constant (S) | Dissi. Coet. (mW/℃) | Operating Temp (℃) |
| Range(Ω) | Tolerance | Value(Ω) | Tolerance |
| MF57□□□2700 | 220-630 | ±1% ±3% ±5% | 2700 | ±1% ±3% ±5% | 0.3 0.5 | ≤0.5 | ≤60 | 6-13 | -55-+125 |
| MF57□□□3000 | 270-5.1K | 3000 |
| MF57□□□3300 | 270-5.1K | 3300 |
| MF57□□□3600 | 270-5.1K | 3600 |
| MF57□□□3900 | 270-5.1K | 3900 |
| MF57□□□4100 | 330-6.8K | 4100 |
| MF57□□□4300 | 330-6.8K | 4300 |
| MF57□□□4700 | 330-10K | 4700 |
Remarks: Custom design for different RT curve and mounting
configuration available
Choice of the tolerances
The precision of the temperature measurement determines the
calculation of the tolerance on the resistance: R/R = (%/°C). T
(°C)
For example, the NTC NR55--3049-99, using “N5” material (R (T)
characteristic displayed on page 31), requires a precision of 1°C
over the temperature range 110°C - 120°C.
The tolerances can be calculated: R110°C /R110°C = 1°C* 2.91%/°C =
2.91% R120°C /R120°C = 1°C* 2.76%/°C = 2.76%
*For your specific requirements, please consult us.
