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| Categories | NTC Thermistor |
|---|---|
| Brand Name: | WS |
| Model Number: | WS-MFB |
| Certification: | SGS |
| Place of Origin: | Shenzhen of China |
| MOQ: | 1000pcs |
| Price: | Negotiation |
| Payment Terms: | T/T, Western Union,Paypal |
| Supply Ability: | 1000000pcs/day |
| Delivery Time: | 3-5 work days |
| Packaging Details: | plastic bag or reel + carton |
| Color: | Red |
| Type: | DIP |
| B value: | 4000 & 4400K |
| Application: | coffee pot, electric blanket, soy sauce pot |
| Period of Storage: | one year |
| storage temperature:: | -10℃~+40℃ |
Recommended applications: Rice cooker, microwave oven, electric cooker, coffee pot, electric blanket, soy sauce pot, toaster etc. Features: 1. Body sizeΦ2mm X 4mm Code number and specifications:
Dimensions:
|
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-MFB－1004-4400 | 1000 | 1,2,3,5,10 | 25/50 | 4400 | 1,2,3,5 | 100 | ≧2 | ≦9 | -40～+300 |
| WS-MFB－1384-4400 | 1388 | 25/50 | 4400 | ||||||
Ps.:can be tailored according to clients’ demand
operating current:
In 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∣≦ 2% | ||||
| 2 | High temperature storage | IEC 60068-2-21 | Highest operaing temperature*1000H | No visible damage ∣△R25/R25∣≦ 3% | ||||
| 3 | Thermal shock | IEC 60068-2-14 | 10 cycles | No visible damage ∣△R25/R25∣≦ 2% | ||||
| 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∣≦ 2% | ||||
| 5 | Life test | IEC 60539-1 4.26 | 25±5℃, Pmax; 1000hrs (internal test: 56 days) | No visible damage ∣△R25/R25∣≦ 3 % | ||||
● storage conditions:
1. storage temperature: -10℃~+40℃
2.relative humidity:≦75%RH
● Period of Storage:one year
Contact: Angel Sun
Tel: +86-13528847020
Email: Admin@winsunhk.cn
Skype: Angelsun618
Whatsapp: 13528847020
Wechat: 13528847020
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