Datasheet > ERT-J1VP473H

ERT-J1VP473H

更新时间： 2024-11-29 01:09:11

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松下 - PANASONIC		/
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NTC Thermistors

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NTC Thermistors

The NTC Thermistors

This is a Negative Temperature Coefﬁcient Resistor whose resistance changes as ambient temperature changes. Therm-

istor comprises 2 or 4 kinds of metal oxides of iron, nickel, cobalt, manganese and copper, being shaped and sintered

at high temperature (1200 to 1500 C)

■ Features

■ Recommended Applications

● For temperature measurement or temperature detection :

● Temperature Coefﬁcient of Resistance is negative and

extremely large

thermometer, temperature controller

● Various kinds of types especially smaller ones are

available.

● For temperature compensation : transistor circuit,

measuring instruments

● Resistance values are available from 22 Ω to 470 kΩ

Physical Characteristics of NTC Thermistors

■

Thermistor is a resistor sensitive to temperature utilizing

the large temperature-coefficient of metal oxide semi-

conductor. And its temperature dependency of resistance

value is indicated by the following equation:

Fig. 1

1000

100

....................................

(1)

R=R exp

[ ( )]

T : Standard Temperature 298.15 K(25 C)

R : Resistance at T K

B: Thermistor Constant (K)

So called Temperature Coefficient ( ) is generally

indicated as follows:

3000

4000

0.1

....................................................................

(2)

T²

0.01

But is not adequate for use as a constant, because a

change by temperature is considerably large, so B Value

is used as a coefﬁcient of thermistor.

0.001

–40 –20

20 40 60 80 100 120 140

T (˚C)

■ Major Characteristics of NTC Thermistors

The relation between resistance and temperature of a

thermistor is linear as shown in Fig. 2, in which resistance

is shown in vertical direction in a logarithmic scale and

reciprocal of absolute temperature in horizontal direction.

Bias degrees in these straight lines are determined according

to the B Value expressed by the following equation.

Fig. 2

10000000

1000000

100000

10000

1000

100

ꢃ

ꢂ

ꢅ

nR – nR

..................................................

B =

(3)

R : Resistance at T K

When calculated from this equation, B Value is a variable

in a strict sense, and the resistance is expressed by the

following equation:

–

R = AT ^Cexp D/T

(4)

........................................................

In (4), C is a small positive or negative constant and quite

negligible except use in precision temperature-measuring

device, thereby the B Value is, in practical usage, to be

considered as a constant. In Fig. 1,

2.4

2.9

3.4

(L10 ^–3K^–1

3.9

4.4

)

125

T (˚C)

–20

–40

the relation between the resistance ratio R /R

(R : Resistance at 25 C, R : Resistance at T C) and B Value is

shown with T C, in the horizontal direction.

00 Sep. 2010

12 3 4 5 6 7...14

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ERT-J1VP473H 替代型号

型号	品牌	替代类型	描述	数据表
NCP18WB473E03RB	MURATA	类似代替	NTC Thermistor, 47000ohm, Surface Mount, CHIP, 0603

与ERT-J1VP473H相关器件

型号	品牌	获取价格	描述	数据表
ERTJ1VP473HM	PANASONIC	获取价格	车载用NTC热敏电阻（片式）
ERTJ1VP473J	PANASONIC	获取价格	NTC热敏电阻（片式）
ERTJ1VP473JM	PANASONIC	获取价格	车载用NTC热敏电阻（片式）
ERTJ1VP473K	PANASONIC	获取价格	NTC Thermistor, 47000ohm, Surface Mount, CHIP
ERTJ1VR103	PANASONIC	获取价格	Multilayer NTC Thermistors
ERTJ1VR103FA	PANASONIC	获取价格	Multilayer NTC Thermistors
ERTJ1VR103GA	PANASONIC	获取价格	Multilayer NTC Thermistors
ERTJ1VR103H	PANASONIC	获取价格	NTC热敏电阻（片式）
ERTJ1VR103HA	PANASONIC	获取价格	Multilayer NTC Thermistors
ERTJ1VR103J	PANASONIC	获取价格	NTC Thermistor, 10000ohm, Surface Mount, CHIP, 0603, ROHS COMPLIANT

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