Product Details:
Payment & Shipping Terms:
|
| Other Name: | Linear Themistor | Reistiance: | 20K Ohm & 30K Ohm |
|---|---|---|---|
| B Value: | 3950 & 4200K | Applications: | Automobile Electrics,CPU Fan Etc |
| Color: | Black | Operating Temperature Range: | -30 ~ +120℃ |
| Body Size: | Φ3.5mm | ||
| High Light: | ntc power thermistor,10k ntc thermistor |
||
Body size 3.5mm diameter Black Epoxy Sealed NTC Thermistor 20K ohm and 30K ohm / R
|
Features:
Payment and Shipping:
|
Characteristics
| Part no. | Zero power resistance @ 25°C |
Tolerance of R25 | B value | Tolerance of B value | Max. Power Dissipation At 25°C |
Dissipation Factor | Thermal Time constant |
Operating temperature range | |
| R25 (KΩ) | ( ±%) | (K) | (±%) | Pmax(mW) | δ(mW/°C) | τ(Sec.) | (°C) | ||
| WS-MFEB-1－2002-3950 | 20 | 1,2,3, 5,10 |
25/50 | 3950 | 1,2,3,5 | 10 | ≧2 | ≦3 | -30～+120 |
| WS-MFEB－2002-4200 | 20 | 25/50 | 4200 | ||||||
| WS-MFEB-1－3002-3950 | 30 | 25/50 | 3950 | ||||||
Ps.:can be tailored according to clients’ demand
operating currentIn order to make the test more accurate, the running current should be as less as possible. The following formula is suggested:
I＝sqrt(0.005δT^2/(B*R))
PS.:1.sqrt is for square root
2. δ is for dissipation constant in mW/℃
3. T is for temperature in Kelvins
4.B is for the index of the thermal sensitivity
5.R is for zero-power resistance in KOHM
6.final current is in mA
R－T characteristic curve
Reliability test
| No. | item | standard | Test conditions | specifications | ||||
| 1 | Low temperature storage | IEC 60068-2-21 | Lowest operating temperature*1000H | No visible damage ∣△R25/R25∣≦ 1% |
||||
| 2 | High temperature storage | IEC 60068-2-21 | Highest operaing temperature*1000H | No visible damage ∣△R25/R25∣≦ 1% |
||||
| 3 | Thermal shock | IEC 60068-2-14 | 10 cycles | No visible damage ∣△R25/R25∣≦ 1% |
||||
| step | temperature(℃) | period(ms) | ||||||
| 1 | Low temperature ±5℃ |
30±3 | ||||||
| 2 | Room temperature | 5±3 | ||||||
| 3 | High temperature ±5℃ |
30±3 | ||||||
| 4 | Room temperature | 5±3 | ||||||
| (internal test: 100 cycles) | ||||||||
| 4 | Constant temperature and humidity | IEC 60068-2-3 | 60℃, 93%±3% RH; 1000H (internal test: 56 days) |
No visible damage ∣△R25/R25∣≦ 1% |
||||
| 5 | Life test | IEC 60539-1 4.26 |
25±5℃, Pmax; 1000hrs (internal test: 56 days) |
No visible damage ∣△R25/R25∣≦ 1 % |
||||
● storage conditions:
1. storage temperature: -10℃~+40℃
2. relative humidity:≦75%RH
● Period of Storage:one year
Dimensions:
Contact: Angel Sun
Tel: +86-13528847020
Email: Admin@winsunhk.cn
Skype: Angelsun618
Whatsapp: 13528847020
Wechat: 13528847020
QQ: 553695308
Contact Person: Ms.Angel Sun
Tel: +8613528847020
