NCP15XH103J03RC 데이터 시트보기 (PDF) - Murata Manufacturing

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NCP15XH103J03RC

NTC Thermistors Temperature Sensor and Compensation 0402 (1005) Size

Murata Manufacturing 

!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.

• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

Basic Characteristics

!Basic Characteristics

1. Zero-power Resistance of Thermistor: R

R=R0 expB (1/T-1/T0) ..............(1)

R: Resistance in ambient temperature T (K)

(K: absolute temperature)

R0: Resistance in ambient temperature T0 (K)

B: B-Constant of Thermistor

2. B-Constant

as (1) formula

B=Rn (R/R0) / (1/T-1/T0)

............(2)

Resistance vs. Temperature

102

101

1

R44E.pdf

Dec.17,2012

3. Thermal Dissipation Constant

When electric power P (mW) is spent in ambient

temperature T1 and thermistor temperature rises T2,

there is a formula as follows

P=C (T2-T1) ..................(3)

C: Thermal dissipation constant (mW/°C)

Thermal dissipation constant is varied with dimensions,

measurement conditions, etc.

10–1

B=3450

B=3900

B=4100

10–2

–20 0

20 40 60 80 100 120

Temperature (°C)

4. Thermal Time Constant

Period in which Thermistor's temperature will change

63.2% of its temperature difference from ambient

temperature T0 (°C) to T1 (°C).

Thermal Time Constant

T1

X

63.2%

T0

Time

!Performance

Item

Resistance

B-Constant

Thermal Dissipation

Constant

Condition

Measured by zero-power in specified ambient temperature.

Calculated between two specified ambient temperatures by next formula.

T and T0 is absolute temperature (K).

B

=

Rn (R/R0)

1/TY1/T0

Shows necessary electric power that Thermistor's temperature rises 1°C by self heating.

It is calculated by next formula (mW/°C).

C=

P

TYT0

Rated Electric Power

Shows the required electric power that causes Thermistor's temperature to rise to a specified temperature by self heating,

at ambient temperature of 25 °C.

Permissive Operating Current

It is possible to keep Thermistor's temperature rising max. 1°C.

Please inquire about test conditions and ratings.

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