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504NT-4-R025H45G

    Buy cheap 504NT-4-R025H45G from wholesalers
     
    Buy cheap 504NT-4-R025H45G from wholesalers
    • Buy cheap 504NT-4-R025H45G from wholesalers
    • Buy cheap 504NT-4-R025H45G from wholesalers
    • Buy cheap 504NT-4-R025H45G from wholesalers

    504NT-4-R025H45G

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    Brand Name : Semitec
    Model Number : 504NT-4-R025H45G
    Price : $0.5/PCS
    Payment Terms : T/T, L/C, D/A, D/P, Western Union, MoneyGram
    Supply Ability : 500000 PCS
    Delivery Time : STOCK
    Certification : RoHS DIRECTIVE2011/65/EU
    • Product Details
    • Company Profile

    504NT-4-R025H45G

    Semitec’s glass encapsulated NT-4 series thermistor features high heat resistance and high sensitivity. Compared with conventional thermistors, the NT-4 thermistors are smaller, faster in response, and more reliable which makes them suitable for various applications. SEMITEC’S NT thermistors are fully compliant with RoHS DIRECTIVE2011/65/EU.


    Applications

    3D printers, HVAC equipment, water heaters, microwave ovens, home appliances, hybrid vehicles, fuel cell vehicles, automotive electronics, medical, disaster prevention, security, office automation, other high-temperature, high-speed sensing applications

    Dimensions

    504NT-4-R025H45G

    Rating

    Part No.Rated zero-power resistance※1※2B value※3Dissipation factor
    (mW/℃)
    Thermal time constant
    ※4
    Rated power
    (mW) at 25℃
    Operating Temperature range
    (℃)
    Temperature
    (℃)
    Resistance
    (kΩ)
    ToleranceTemperature
    (℃)
    B-value
    (K)
    Tolerance
    852NT-4-R050H34G503.485±3%0/1003450±2%0.86 (0.6)4-50~+300
    103NT-4-R025H34G2510±3%25/853435±2%
    103NT-4-R025H41G2510±3%25/854126±2%
    493NT-4-R100H40G1003.3±3%0/1003970±2%
    503NT-4-R025H42G2550±3%25/854288±2%
    104NT-4-R025H42G25100±3%25/854267±2%
    104NT-4-R025H43G25100±3%25/854390±2%
    204NT-4-R025H43G25200±3%25/854338±2%
    234NT-4-R200H42G2001±3%100/2004537±2%
    504NT-4-R025H45G25500±3%25/854526±2%
    105NT-4-R025H46G251000±3%25/854608±2%

    ※1 Rated zero-power resistance at each temperature.
    ※2 Other resistance tolerance is also available, please ask us.
    ※3 B value: determined by rated zero-power resistance at each temperature.
    ※4 Time when thermistor reached 63.2% of the temperature difference. The value is measured in the air. (silicon oil)

    How to use

    Thermistor is a generic term for Thermally Sensitive Resistor, a semiconductor component whose resistance value changes significantly with changes in temperature.
    An NTC thermistor whose resistance value decreases with increasing temperature (having a negative temperature coefficient) is generally called a thermistor.
    Thermistors are ceramic semiconductors made mainly from metal oxides and sintered at high temperatures. Various shapes and properties are available depending on the manufacturing method and structure. They are widely used for temperature measurement and temperature compensation.

    Figure 1 shows a typical circuit example when using a thermistor.

    Fig. 1 Example of a circuit using a thermistor

    One example of measuring temperature with a thermistor is to input the voltage between the terminals of the thermistor to an AD converter, convert it to a digital signal, and convert it to temperature using a microcontroller.
    Since the resistance value change of a thermistor with respect to temperature is nonlinear, a circuit consisting of a thermistor and a fixed resistor connected in series, as shown in Figure 1, is used to linearize the voltage change of the output voltage Vth.

    The thermistor output voltage Vth shown in Figure 1 is calculated as Vth = Vcc × R/(Rth + R), where Vcc is the power supply voltage, Rth is the resistance value of the thermistor, and R is the resistance value of the fixed resistor in series, to give the temperature detected by the thermistor.
    The resistance R to be connected in series with the thermistor can be selected by the following formula based on the actual temperature range to be measured.

    RL: Temperature range Thermistor resistance value at minimum temperature
    RM: Temperature range Thermistor resistance value at intermediate temperature
    RH: Temperature range Thermistor resistance value at maximum temperature

    As an example, if an AT thermistor (103AT-2) is used for temperature detection in the temperature range 0℃ to 60℃, the resistance value of the fixed resistor connected in series with the thermistor is calculated to be 6.4 kΩ from the following formula.

    L  0℃:27.28kΩ

    M 30℃:8.313kΩ

    H 60℃:3.020kΩ

    Graph 1 shows that when a thermistor is used in combination with a fixed resistor (6.4 kΩ), the output voltage Vth is linearized with respect to temperature change over the temperature range (0℃ to 60℃), thereby improving the precision of temperature detection.

    Graph 1 Linearization of output voltage Vth with respect to temperature change


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