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NTPAA5R1LDNB0 Datasheet(PDF) 8 Page - Murata Manufacturing Co., Ltd.

Part # NTPAA5R1LDNB0
Description  NTC Thermistors
Download  47 Pages
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Manufacturer  MURATA [Murata Manufacturing Co., Ltd.]
Direct Link  http://www.murata.com
Logo MURATA - Murata Manufacturing Co., Ltd.

NTPAA5R1LDNB0 Datasheet(HTML) 8 Page - Murata Manufacturing Co., Ltd.

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1. Zero-power Resistance of Thermistor: R
2. B-Constant
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
as (1) formula
B=
Rn (R/R0) / (1/T-1/T0)
............(2)
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.
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).
Resistance vs. Temperature
!Basic Characteristics
!Performance
Thermal Time Constant
Item
Resistance
Condition
Measured by zero-power in specified ambient temperature.
Rated Electric Power
Shows necessary electric power that Thermistor's temperature rises to a specified temperature by self heating in ambient
temperature 25˚C.
Permissive Operating Current
It is possible to keep Thermistor's temperature rising max. 1˚C.
Thermal Dissipation
Constant
Shows necessary electric power that Thermistor's temperature rises 1˚C by self heating.
It is calculated by next formula. (mW/˚C)
B-Constant
Calculated between two specified ambient temperatures by next formula.
T and T0 is absolute temperature (K).
Rn (R/R0)
B =
1/T
Y1/T0
P
C =
T
YT0
102
101
−20
Temperature (˚C)
0
20
40
60
80
120
100
10−2
10−1
1
B=3450
B=3900
B=4100
Basic Characteristics
T1
T0
Time
63.2%
X
!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 because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
Please inquire about test conditions and ratings.
• This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our
sales representatives or product engineers before ordering.
• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
!Note
R44E.pdf
10.2.22


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