Features of single-ended glass seal:
The size of the temperature sensing part is compact: φ1.25mm * 2.0mm;
Nominal resistance @ 25 ℃: 100K;
Extensive temperature test range: -40 ℃ ~ 270 ℃;
Lead length: 70 ± 1mm;
High resistance accuracy: ± 1%; single-ended glass seal, can be used in harsh environments such as high temperature and humidity;
Good stability and high reliability;
NTC thermistor, negative temperature coefficient thermistor;
100% lead-free and RoHS compliant.

Single-end glass sealed NTC thermistor temperature sensor products are widely used in temperature sensing of laser diodes, optical components, industrial process control, etc. These applications require higher temperature sensitivity, long-term stability, and higher application temperatures.

In order to meet your different needs, this series of products are divided into multiple models:

ATH100K1R25: the lead is copper-plated bare wire;

ATH100K1R25T70: The lead sleeve has a Teflon sleeve;

ATH100K1R25T70S: The lead wire is not only covered with a Teflon sleeve, but the epoxy head is sealed between the temperature sensor and the sleeve.

A: Dimensions Fig.

Model	D	L1max	L2		d±0.05
MF51-2.80	2.80±0.20	4.40	30±5	50±5	0.28
MF51-1.80	1.80±0.20	3.80	30±5	50±5	0.23
MF51-1.50	1.5±0.20	2.00	30±5	50±5	0.21
MF51-1.25	1.25±0.20	1.80	30±5	50±5	0.21
MF51-1.20	1.20±0.20	1.80	30±5	50±5	0.21
MF51-0.70	0.70±0.20	1.20	30±5	50±5	0.15
Another: Dmax = 0.90mm, Dmax = 1.75mm, Dmax = 1.95mm Product

 
II: Features:
1: MF51 series radial leaded products for single-ended glass encapsulated type
2: good stability, high reliability
3: Wide range of resistance: 1KΩ ~ 200KΩ
4 high precision resistance and B values
5: glass package, can be used in high temperature and humidity and other harsh environments
6: Small, rugged, easy to install automation
7: Operating temperature range -40 ℃ ~ + 300 ℃
8: Rated power: ≤25mW
9: Fast response and high sensitivity
 
Four: Product Type Description
MF 51 103 F 3950
① ② ③ ④ ⑤
①MF ¬-- negative temperature coefficient (NTC) thermistor code.
②5D-- single-ended glass encapsulated NTC thermistors.
③103 - thermistor nominal resistance, indicating that the nominal resistance of the resistance: 10 × 103 (Ω).
④F-- resistance value error (accuracy) is: F = ± 1%, G = ± 2%, H = ± 3%, J = ± 5%
⑤3950-- thermal resistance index (material factor) B is: 395 × 10 (K)
 Note: according to customer requirements, provide different resistance, B value precision and customization.
 When measuring NTC thermistor, we must note the following:
• can not be measured in the air, the larger the difference in air temperature measurement inaccurate, resulting accuracy deviation.
• The use of high-precision thermostat bath was measured after the test NTC, in the bath, the bath temperature must be stabilized before measurement.
• Measure the voltage as low as possible to reduce measurement errors caused by self-heating of the NTC.
• High temperature measurement, the thermometer on the required temperature of the bath is corrected, check
Five: MF5D Series Model Specifications

Model Nominal resistance value B value Operating temperature R25 （KΩ） accuracy （25/50℃）（K） accuracy （℃） MF51-502□3270 5 ±1％ ±2％ ±3％ ±5％ 3270 ±1％ -55～300 MF51-502□3470 5 3470 MF51-103□3380 10 3380 MF51-103□3435 10 3435 MF51-103□3470 10 3470 MF51-103□3950 10 3950 MF51-203□3950 20 3950 MF51-503□3900 50 3900 MF51-503□3950 50 3950 MF51-104□3950 100 3950 MF51-104□3990 100 3990 MF51-104□4000 100 4000 MF51-104□4100 100 4100 MF51-104□4200 100 4200 Conventional single-ended glass sealed type   Model Nominal resistance value B value D Operating temperature R25 （KΩ） accuracy （25/50℃） （25/85℃） accuracy mm （℃） （K）     MF51-104□3950FA-0.9 100 F：±1％ G：±2％ H：±3％ J：±5％ 3950 　 F：±1％ G： ±2％ H： ±3％ J： ±5％ 0.9 -55～300 MF51-103□3380FA-1.25 10 3380 　 1.25 MF51-103□3435FB-1.25 10 　 3435 1.25 MF51-103□3950FA-1.25 10 3950 　 1.25 MF51-103□3470FA-1.25 10 3470 　 1.25 MF51-503□3950FA-1.25 50 3950 　 1.25 MF51-104□3950FA-1.25 100 3950 　 1.25 MF51-104□4200FA-1.25 100 4200 　 1.25 MF51-105H4608GA-1.25 1000 4608 　 1.25 MF51-503.485K□3400FA-1.50 503.485 3400 　 1.50 MF51-502□3950FA-1.5 5 3940 　 1.50 MF51-103□3380FA-1.50 10 3380 　 1.50 MF51-103□3435FB-1.50 10 　 3435 1.50 MF51-103□3950FA-1.50 10 3950 　 1.50 MF51-503□3950FA-1.50 50 3950 　 1.50 MF51-503□4050FA-1.50 50 4050 　 1.50 MF51-96.5K□3950FA-1.50 96.5 3950 　 1.50 MF51-96.5K□4200FA-1.50 96.5 4200 　 1.50 MF51-104□3950FA-1.50 100 3950 　 1.50 MF51-104□4200FA-1.50 100 4200 　 1.50 MF51-104□4320FA-1.50 100 4320 　 1.50 MF51-103.9K□3951FA-1.50 103.9 3951 　 1.50 MF51-103.9K□4200FA-1.50 103.9 4200 　 1.50 MF51-204□3899FA-1.50 200 3899 　 1.50 MF51-234□4537FX-1.50 230 B100/200 4537 1.50