|
[China]
Trade Verify
Address: No.1, Yixiang ,Liwu Industrial Park,Liwuyuan Village,Xihu District, Shilong Town,Dongguan 523325,Guangdong ,China
Contact name:James Lai
Dongguan Ampfort Electronics Co., Ltd. |
|
Verified Suppliers
|
|
|
20mm Bead NTC Thermistor Assembly 50K B Constant B25/85 3435 For Body Temperature
Description Of The 20mm Bead NTC Thermistor Assembly
Thin-film thermistors are mainly used for various temperature environment measurements; thin-film thermistors are mainly used in communications, electronic equipment, medical equipment, switching power supplies, mobile phone battery protection boards, computer motherboard CPU protection, electronic gifts, desk calendars, thermometer displays, etc. .
Typical Application Of The 20mm Bead NTC Thermistor Assembly
1. Temperature control and temperature detection of household appliances such as induction cooker, electric pressure cooker, rice cooker, electric oven, disinfection cabinet, water dispenser, microwave oven, electric heater;
2. Temperature detection and temperature compensation for medical equipment (such as copiers, printers, etc.);
3. Temperature control and testing of industrial, medical, environmental, meteorological and food processing equipment;
4. Temperature protection of rechargeable battery packs and chargers;
5. Temperature compensation for instrument coils, integrated circuits, quartz crystal oscillators and thermocouples.
Main Features Of The 20mm Bead NTC Thermistor Assembly
1. The product is epoxy thermistor
2. Good stability and high reliability
3. Wide resistance range: 2~500KΩ
4. High resistance and B value accuracy
5. Glass packaging, can be used in harsh conditions such as high temperature and high humidity
6. Small size, sturdy structure, easy to install automatically
7. Operating temperature range -30~+90℃
8. Fast thermal induction and high sensitivity
9. Standard R25 values are 5kohms,10kohms,50kohms and 100kohms with lengths of 11mm.15mm,20mm,25mm, 36mm,44mm.45mm,50mm, and 75mm .
Standard Specification Of The 20mm Bead NTC Thermistor Assembly
| Part Number | Norminal Resistance | B Value(K) | Operating temperature | |||
| R25 (KΩ) | Tolerance | (25/50℃) | (25/85℃) | Tolerance | (℃) | |
| MF55□502□3270A | 5 | ±1％ ±2％ ±3％ ±5％ | 3270 | ±1％ ±2％ ±3％ ±5％ | -50～125 | |
| MF55□502□3470A | 5 | 3470 | ||||
| MF55□103□3380A | 10 | 3380 | ||||
| MF55□103□3435B | 10 | 3435 | ||||
| MF55□103□3470B | 10 | 3470 | ||||
| MF55□103□3950A | 10 | 3950 | ||||
| MF55□103□3975B | 10 | 3975 | ||||
| MF55□203□3950A | 20 | 3950 | ||||
| MF55□303□3950A | 30 | 3950 | ||||
| MF55□473□3950A | 47 | 3950 | ||||
| MF55□503□3950A | 50 | 3950 | ||||
| MF55□104□3950A | 100 | 3950 | ||||
Notes:
1). Do not bend the resistance wire frame at will to avoid the chip and wire frame falling off and causing poor resistance;
2). The temperature should not exceed 300℃ during welding, and the welding time should not exceed 0.5 seconds;
3). Use a hot air gun when shrinking the sleeve, and the temperature of the air gun should be controlled at about 120℃;
4). Use a constant-temperature soldering iron when soldering, with a flat soldering iron tip, holding the resistor in one hand and the wire in the other for butt welding, which can improve production efficiency and shorten welding time;
5). Special Note: Do not touch the chip (ie the top of the resistor) with your hands!
6). Custom made is available
Dimension Of The 20mm Bead NTC Thermistor Assembly (mm)
Total Length= 11mm
|
Total length=15mm
|
Total length=20mm
|
Total length=20mm(Width=3.6mm)
|
Total length=20mm(Width=4.5mm)
|
Total length=36mm
|
Total length=44mm
|
Total length=45mm
|
Total length=50mm
|
Total length=75mm
|
ROHS & REACH Certification Of The 20mm Bead NTC Thermistor Assembly
Related Products Of The 20mm Bead NTC Thermistor Assembly
Mechanical properties
1. Resistance to welding heat
The terminal is immersed in a solder bath at a distance of 260±5°C to 2.0mm from the body, and kept for 5±1 seconds. The rate of change of the rated zero-power resistance should be within ±1% of the initial value.
2. Solderability
After immersing the terminals in the soldering bath at 235±5℃ for 2±0.5s, about 90% of the terminals should be evenly covered with solder.
3. Free fall
The maple board has been dropped three times from a height of 0.75m without obvious damage, and the rated zero-power resistance change rate should be within ±1% of the initial value.
4. Termination robustness
After applying 1N load weight to the terminal for 10±1s, there is no obvious damage, and the rated zero-power resistance change rate should be within ±1% of the initial value.
Insulation resistance
Insulation resistance should exceed 100MΩ measurement
DC 100V between film area and terminal
Climate test
1. Dry heat
After the test sample is exposed to air at 90±1℃ for 1000 hours, the rate of change of the rated zero-power resistance should be within ±1% of the initial value.
2. Damp heat
After the test sample is exposed to 40±2℃ and 95% humidity for 1000 hours, the rate of change of the rated zero-power resistance should be within ±1% of the initial value.
3. Cold
After the test sample is exposed to air at -30±1℃ for 1000 hours, the rate of change of the rated zero-power resistance should be within ±1% of the initial value.
4. Loading
When the temperature is 40±2℃, the humidity is 95%, and the humidity is 1000h, after applying a DC 1mA current to the sample, the rate of change of the rated zero-power resistance should be within ±1% of the initial value.
5. Changes in temperature
One cycle of temperature change shall be performed in the order of the following conditions.
Room ambient temperature. (initial value)
Place at -25±3℃ for 30 minutes.
Room temperature, 3 minutes.
Place at +90±2℃ for 30 minutes.
Room temperature, 3 minutes.
After 100 cycles, the rate of change of the rated zero-power resistance should be within ±1% of the initial value.
