Single-ended Glass-Sealed NTC Thermistor MF51 Supplier

Single-ended glass-sealed NTC thermistor is a high-reliability temperature sensor encapsulated by glass sealing technology, designed for high temperature, high humidity and fast response scenarios. Its core features and applications are as follows:

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1. Core features and advantages
‌High temperature resistance‌
The upper limit of the operating temperature is ‌350℃‌ (gold electrode model), ordinary epoxy resin encapsulation only supports 120℃, and glass encapsulation effectively isolates high-temperature oxidation and chemical corrosion.
The airtight structure prevents moisture penetration and is suitable for high temperature and high humidity environments such as microwave ovens and industrial ovens.

‌Fast response capability‌
The thermal time constant is ≤6.5 seconds (in static air), and the micro-droplet-shaped encapsulation (diameter 1.5~3mm) reduces the heat capacity and realizes millisecond-level dynamic temperature measurement.

‌High precision and stability‌
The photolithography process ensures resistance accuracy of ±1%, B value range of 3380K~4100K, and the nominal resistance at 25℃ covers 3K~200KΩ48.
The glass material is aging-resistant, and the resistance drift rate is <0.5%/year for long-term use.

2. Key parameter selection guide

Thông số‌	‌ Sự miêu tả‌	‌ Typical value
‌ Package size	Teardrop-shaped/cylindrical, diameter 1.5~9mm (such as MF51: Ø2.5mm)	Ø2.5mm (MF51)
‌ Resistance range ‌	Customization is supported, commonly used 3K/10K/50K/100KΩ (25oC)	10KΩ±1%
‌ B value accuracy	3435K/3950K, vân vân., tolerance ±0.5%~±1%	3950K±1%
‌ Thermal time constant‌	Still air ≤6.5 seconds, further shortened in oil medium ≤6.5s	≤6.5s
‌ Lead material	Electroplated iron-nickel alloy (corrosion-resistant) or gold electrode (ultra-high temperature)	Iron-nickel alloy

Model selection example:
MF51: general purpose, Ø2.5mm, phản ứng nhanh, chi phí thấp;
GT series (Aisheng): gold electrode, resistant to 350℃, special for automobile/industrial use.

3. Typical application scenarios
High temperature industrial equipment
Microwave oven/oven temperature monitoring: withstand >200℃ cavity temperature;
Laser diode heat dissipation: fast response to prevent overheating damage.
Automotive electronics
Engine oil temperature/water temperature monitoring: glass seal is resistant to vibration and oil corrosion.
Medical equipment
Electronic thermometer: millisecond response improves measurement efficiency.
Home appliance control
Coffee machine/electric kettle: precise temperature control to prevent dry burning.

4. Selection considerations
Environmental matching
Gold electrode glass seal (such as GT series) is preferred for >150oC, and the airtightness level needs to be confirmed in humid environments.
‌Response speed optimization‌
Reducing the package size (such as Ø1.5mm) can shorten the thermal time constant to milliseconds.
‌Cost control‌
For ordinary high temperature scenarios, choose MF51 (unit price $0.1~0.03), and for ultra-high temperature, choose the gold electrode model.