3950 1000K Ohm Power NTC Thermistor

32 Grade High Accuracy +/-0.1C NTC Thermistor With Enameled Wire For Thermometer
Description Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor

High Precision NTC Thermistors for Extremely Accurate Temperature Measurement The MF51E NTC Thermistors were specially designed for use in electronic thermometers which require better than average accuracy. The extremely small size allows the thermistor to respond very quickly to tiny changes in temperature. The MF51E can be supplied un-calibrated with standard tolerances or calibrated and grouped according to R at 37°C±0.01% for extreme interchangeability so as to eliminate the need for other calibrations.

Features Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor
■ Small Size and fast response and light weight
■ Long term Stability and Reliability
■ High accuracy and Interchangeability
■ High Sensitivity and Fast thermal response
■ Thermally Conductive Epoxy coated
■ Available tolerances: ±0.5%, ±1%, ±2%, ±3% and ±5%
■ B Value tolerances: ±0.5%, ±1.0% and ±2.0%
■ Resistance calibration available at 37°C ±0.01% (see table for details of grouping)
■ Long-term Stability and Reliability
■ Excellent Tolerance and Interchangeability
■ Available in all popular resistance values
■ Dissipation Constant ≥0.7mW/°C
■ Time Constant of ≤3.2 seconds
■ Rated Power: 3.5mW
■ Operating Temperature Range

Applications Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor

Fire alarm, computer, copier, electronic calendar, thermometer, temperature control instrument and temperature compensation.
■ Temperature sensing , control and compensation
■ Electronic thermometer, Medical equipment and patient monitoring
■ General Instrumentation applications
■ Electronic Thermometers
■ Medical Equipment and Patient


Specification Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor

Part No.	Nominal resistance R 25℃		B Value (R25/50℃)		Rated power (mw)	Dissipation (mW/℃)	Thermal time constant (S)	Operating temp. (℃)
	Range (KΩ)	Tolerance (%)	Nominal value (K)	Tolerance (%)
MF51E3270 MF51E3380 MF51E3470 MF51E3600 MF51E3950 MF51E4000 MF51E4050 MF51E4150 MF51E4300 MF51E4500	0.2-20 0.5-50 0.5-50 1-100 5-100 5-100 5-200 10-250 20-1000 20-1000	E+/-0.5 F+/-1 G+/-2 H+/-3 J+/-5	3270 3380 3470 3600 3950 4000 4050 4150 4300 4500	E+/-0.5 F+/-1 G+/-2	3.5	≥ 0.7	≤ 3.2	-40℃ - +100℃

Size Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor(Unit:mm)

Dimension	D max	L 1 max	L 1 +/- 3	L 2 +/- 1	d +/- 0.05
Normal size	1.6	4.0	100	3	0.2
	1.6	Customer Specified

Resistance Calibration at 37℃ +/- 0.005℃ of Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor MF51E303E3950

R37℃=30.025KΩ±2.664% B30/45=3950K±0.5%

Category	(KΩ)	Category	(KΩ)	Category	(KΩ)	Category	(KΩ)
1	29.275KΩ	9	29.675 KΩ	17	30.075 KΩ	25	30.475 KΩ
2	29.325 KΩ	10	29.725 KΩ	18	30.125 KΩ	26	30.525 KΩ
3	29.375 KΩ	11	29.775 KΩ	19	30.175 KΩ	27	30.575 KΩ
4	29.425 KΩ	12	29.825 KΩ	20	30.225 KΩ	28	30.625 KΩ
5	29.475 KΩ	13	29.875 KΩ	21	30.275 KΩ	29	30.675 KΩ
6	29.525 KΩ	14	29.925 KΩ	22	30.325 KΩ	30	30.725 KΩ
7	29.575 KΩ	15	29.975 KΩ	23	30.375 KΩ	31	30.775 KΩ
8	29.625 KΩ	16	30.025 KΩ	24	30.425 KΩ	32	30.825 KΩ

STORAGE CONDITIONS Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor

Temperature: -10℃～+40℃
Humidity: ≤70%RH
Term: ≤6 months (First-in/ First-out)
Place:
Do not exposing the components to the following conditions, otherwise, it may result in deterioration of characteristics.
1) Corrosive gas or deoxidizing gas.
2) Flammable and explosive gases.
3) Oil, water and chemical liquid.
4) Under the sunlight.
Handling after seal open: After unpacking of the minimum package, reseal it promptly or store it inside a sealed container with a drying agent.


Mechanical Requirements Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor

Item	Requirements	Test Method
1.Solder-ability	The terminals shall be uniformly tinned, and its area≥95%	Dipping the NTC terminals to a depth of 15mm in a soldering bath of 245±5℃ and to the place of 6mm far from NTC body for 3±0.5s (See IEC68-2-20 /GB2423.28 Ta )
2.Resistance To Soldering Heat	No visible mechanical damage. ΔR/RN ≤20% (ΔR =∣RN-RN'∣)	Dipping the NTC terminals to a depth of 15mm in a soldering bath of 260±5℃ and to the place for 6mm below from NTC body for 3±0.5s.After recovering4-5h under 25±2℃. The rated zero power resistance value RN' shall be measured. (See IEC68-2-20 /GB2423.28 Tb)
3.Strength of lead terminal	No break out ΔR/RN ≤20% (ΔR =∣RN-RN'∣)	Fasten the body and apply a force gradually to each lead until 10N and then keep for 10sec, Hold body and apply a force to each lead until　 90°slowly at 5N in the direction of lead axis and then keep for 10sec, and do this in the opposite direction repeat for other terminal. After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured. (See IEC68-2-21/GB2423.29 Ua / Ub)

MF51E temperature-measuring NTC thermistor for electronic thermometer

Electronic thermometers have become a daily necessity in hospitals, clinics, and homes because they can help us know if we have problems and help treat them. Electronic thermometers are popular because they are more convenient than mercury thermometers, take shorter measurements, and are safer to use. The most important component of an electronic thermometer is the temperature sensor, which includes a temperature sensor, temperature bar, display screen, switch, button, and battery cover.
The temperature sensor in the electronic thermometer requires high resolution, high precision, and fast response time. What material can be used as the temperature sensor? Common temperature sensors are thermistor sensors, thermistor sensors, thermocouple temperature sensors. Thermistor sensor, the majority is to use semiconductor materials, because of the characteristics of semiconductor materials are better than other materials, such as semiconductor thermistor materials than other materials have a better temperature coefficient of resistance and high resistivity, therefore made of semiconductor thermistor materials than other thermistor temperature sensor material temperature sensors will have more high sensitivity, so use this kind of sensor to make a slight variation in the thermometer is easier to measure temperature.