Thermistor NTC 3KOHM 3988K bead
Thermistor NTC 3KOHM 3988K bead is made of epoxy coated temp. probe and electric wire. It's widely used for over heating protection of transformer coils. It's manufactured from Hefei Jingpu Sensor Technology Co.,Ltd.
Quick details
|
Item name |
NTC element |
| Rated resistance at 25ºC |
3KΩ±1% |
| Beta value |
3988K |
| probe size |
≤3mm |
| wire insulation materials |
PVC / PTFE / TPE /TPU |
marks: custom made components
The thermistor NTC 3KOHM 3988K bead be designed for your professional needs. What ever parts you need for your project, the xx brings your digital object to reality better than ever. You can print functional parts and bring your crazy shaped design concept to life.
Product features
• Advanced technology: smart sensors cable adopts sensitive and reliable NTC thermistor and connected by PVC wire. 1 meter lead wire length (3.28ft), available for
• remote temperature measuring and controlling.
• Wide measuring range: our temperature probe is able to tolerate the widest measuring range (-25ºC to 125ºC)
• Wide application: This multifunctional test probes can be used in over-heat protection of transformer coils.
The resistance, B value, wire and its length, color, processing methods all can be customized.
After you confirm the model, we will send you the samples and datasheet of this model.
1) Recommend Reworking conditions with Soldering Iron
| Item |
Conditions |
| Temperature of soldering Iron-tip |
360ºC (max) |
| Soldering Time |
3 sec. (max) |
| Distance from Thermistor |
10mm (min) |
2) High temperature Exposure (Storage)
Specifications: - Resistance (R25) change should be less than 10sec. No visible damage.
3) Temperature Cycling:
• Resistance (R25) change should be less than ±5%.
• B-constant (B25/50) change should be less than ±2%.
No visible damage
Perform 1000 cycles according to the four heat treatments listed in the following table.
| Step |
1 |
2 |
3 |
4 |
| Temp. (deg.C) |
-55+0/-3 |
R00m Temp |
125+3/0 |
Room Temp. |
| Time (min) |
15±3 |
1 |
15±3 |
1 |
Measurement at 24±2 hours after test condition.
4) Moisture Resistance
Apple the 24-hour heat (25 to 65ºC) and humidity (80% to 89%) treatment shown below, 10 consecutive times.
More product pictures
NTC Thermistor Basics
Q: How fast do NTCs respond?
A: Response time is defined as the time it takes to reach 62% or a new temperature, and is a function of mass. The smaller the sensor the faster the response. A discrete sensor will respond faster than the same sensor packaged insider a metal housing. Typical response times for a Series I NTC thermistor sensor is less than 15 seconds.
Q: Are NTCs avaliable in a small size?
A: Typical size for an epoxy coated discrete in an OD of 0.95'' Max. Miniature glass sensors have a max. OD of 0.15''.
Q: How stable are NTC sensors?
A: Different sensor families have different stability ratings. Epoxy coated NTCs are less stable than a hermetically sealed glass NTC sensors.
Q: How to select a resistance value for an application?
A: The rule of thumb to use a low resistance sensor for a low temperature application and a high resistance sensor in a high temperature application. The goal is to have a working resistance value in your temperature range of interest.
Q: Can NTCs be used in cryogenic applications?
A: Yes, but accuracy at -200ºC would be based on mathematical modeling.
Q: What is the price range for NTCs?
A: Pricing is based on cost, which is related to yield.
The tighter the accuracy the lower the yield.
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