NTC thermistor

NTC thermistor
Model:NTC
Brand:zhengli
Origin:Made In China
Category:Electronics & Electricity / Electronic Components / Resistor
Label:thermistor , NTC thermistor , NTC
Price: US $0.05 / pc
Min. Order:500 pc
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Product Description

NTC  thermistor

 

1.Power NTC thermistor introduction

Power NTC thermistor has en excellent non-linearity characteristic for the resistance and temperature ,its appliance is an easy and effective method to protect electronic device through surge current restraining .

 

2.Resistance and temperature characteristic of power NTC thermistor

Power NTC thermistor can effectively restrain the surge current in the circuit ,and its resistance will fall down to a very small state through the current durative and the power consumption is commonly ignored , the voltage will be borne by the rear divice so that to guarantee the normal function of circuit .

The intergradations metal oxide as the main material , power NTC thermistor is a kind of semi-conductive component manufactured by the ceramic productive process technique ,it belongs to the category of negative thermistor series .

 

3.Range of application

Power NTC thermistor are widely applied in switch power ,conversion power supply ,UPS power and electronic rectifier ,heater ,etc , it has a protected function for RT ,display ,lighting device and circuit of different electronic equipments .

 

 

4.Nomenclature explanation

  1. Zero-power resistance (R25) : the measured resistance of power NTC thermistor under the condition of 25C with a rated zero-power .
  2. The maximum steady current (Imax):the maximum current that could be allowed connecting with the power NTC thermistor under the rated current condition (virtual value)

 

5.Characteristic of power NTC thermistor

1.Meet the environmental requirements of ROHS.

2.Low cost and quality stability.

3.Power NTC thermistors are in small size but with a high power that to restrain the surge current .

4.Powe NTC thermistors possesse the electronic character of fast reflection ,high reliability and long-life time for use.

5.The material has a high constant as B value with small remained resistance .

6.Power NTC thermistors have a large application range integrate products series .

 

 

6.Characteristic of power NTC thermistor

1.The muaximum working current(Imax)>actual operating current in the power loop.

2.Power resistor nominal resistance R: R≥1.414E/Im.

  E:line voltage

  Im:surge current for power Im=100 times the working current ; for the heating wire , heater circuit Im=30 times operating current.

3.The bigger the B value is , the less the residual resistance ,the lower the temperature rise.In general , the bigger the product of the time constant and dissipation coefficient ,the larger the heat capacity of resistor , the stronger the ability to suppress the surge current of resistor .

 

7.Recognized standards and certificates

Recognized organization

Recognized marks

Recognized standard

Certificates series No

UL

CUL

 

 

E361907

 

8.Dimensions

Specifications

Diameter

Dmax

Thickness

Tmax

Lead space

F±1

Lead diameter 

d±0.05

Straight lead

Lmin

DRMΔD-5

6.5

4.0

5.0/2.5

0.55/0.45

25

DRMΔD-7

8.5

4.5

5.0

0.55

25

DRMΔD-9

10.5

5.0

7.5/5.0

0.75/0.55

25

DRMΔD-11

12.5

5.0

7.5/5.0

0.75

25

DRMΔD-13

14.5

6.0

7.5

0.75

25

DRMΔD-15

16.5

6.5

7.5

0.75

25

DRMΔD-20

21.5

7.0

10/7.5

1.0

25

DRMΔD-25

27.5

8.0

10

1.0

25

 

9.Packing type and quantity

Bulk packing with a lable of technical specification inside .

Size

DRM

ΔD-5

DRM

ΔD-7

DRM

ΔD-9

DRM

ΔD-11

DRM

ΔD-13

DRM

ΔD-15

DRM

ΔD-20

DRM

ΔD-25

MPQ (pcs/bag)

1000

1000

500

500

250

250

100

50

 

11.Main technical parameters of D-5

type

Rated zero-power resistance

R25 (Ω)

residual

resistance

under

maximum steady-state current at

25 (Ω)

B25/85

(k)

Current

(A)

Max load capacitance

(uf)

120VAC

Max load

capacitance

(uf)

240VAC

Thermal time constant

(s)

Dissipation factor

(mw/)

Temperature

Range

()

Approvals

UL/CUL

Maximum steady-state current at

25  Imax

Iss

5D-5

5

0.5841

2700

1

1

150

39

<18

>6

-40 ~ +150

10D-5

10

1.039

2700

0.7

0.7

150

39

15D-5

15

1.53

2800

0.6

0.6

150

39

20D-5

20

2.02

2800

0.6

0.6

150

39

22D-5

22

2.06

2800

0.6

0.6

150

39

30D-5

30

2.227

2800

0.5

0.5

150

39

33D-5

33

2.436

2800

0.5

0.5

150

39

50D-5

50

2.653

3000

0.4

0.4

150

39

60D-5

60

2.753

3000

0.3

0.3

150

39

 

 

12.Main technical parameters of D-7

type

Rated zero-power resistance R25 (Ω)

residual resistance under maximum steady-state current at 25 (Ω)

B25/85

(k)

Current

(A)

Max load capacitance

(uf)

120VAC

Max load capacitance

(uf)

240VAC

Thermal time constant

(s)

Dissipation factor

(mw/)

Temperature

Range

()

Approvals

UL/CUL

Maximum steady-state current at 25  Imax

Iss

3D-7

3

0.206

2700

3

3

 

 

<30

>9

-40 ~ +150

5D-7

5

0.2864

2700

2

2

180

47

8D-7

8

0.7353

2800

1

1

180

47

10D-7

10

0.7885

2800

1

1

180

47

12D-7

12

1.18

2800

0.7

0.7

390

100

16D-7

16

1.56

3000

0.7

0.7

390

100

20D-7

20

1.9877

3000

0.6

0.6

390

100

22D-7

22

1.95

3000

0.6

0.6

390

100

30D-7

30

3.7059

3000

0.5

0.5

390

100

33D-7

33

3.8878

3000

0.2

0.2

390

100

50D-7

50

6.465

3000

0.3

0.3

390

100

 

 

13.Main technical parameters of D-9

type

Rated zero-power resistance R25 (Ω)

residual resistance under maximum steady-state current at 25 (Ω)

B25/85

(k)

Current

(A)

Max load capacitance

(uf)

120VAC

Max load capacitance

(uf)

240VAC

Thermal time constant

(s)

Dissipation factor

(mw/)

Temperature

Range

()

Approvals

UL/CUL

Maximum steady-state current at 25  Imax

Iss

2.5D-9

2.5

0.1397

2700

4

4

 

 

<35

>11

-40 ~ +170

3D-9

3

0.1456

2700

4

4

270

68

4D-9

4

0.2541

2700

3

3

270

68

5D-9

5

0.2641

2700

3

3

270

68

6D-9

6

0.3582

2700

2

2

270

68

7D-9

7

0.3265

2800

2

2

390

100

8D-9

8

0.3731

2800

2

2

390

100

10D-9

10

0.398

2800

2

2

390

100

12D-9

12

0.989

2800

1

1

390

100

16D-9

16

1.041

3000

1

1

390

100

20D-9

20

1.173

3000

1

1

560

150

22D-9

22

1.2346

3000

1

1

560

150

30D-9

30

1.32

3000

1

1

560

150

33D-9

33

1.431

3000

1

1

560

150

50D-9

50

1.48

3100

1

1

560

150

60D-9

60

1.641

3100

0.8

0.8

560

150

80D-9

80

2.187

3200

0.8

0.8

270

68

120D-9

120

3.281

3200

0.8

0.8

270

68

200D-9

200

5.469

3200

0.5

0.5

270

68

 

 

14.Main technical parameters of D-11

type

Rated zero-power resistance R25 (Ω)

residual resistance under maximum steady-state current at 25 (Ω)

B25/85

(k)

Current

(A)

Max load capacitance

(uf)

120VAC

Max load capacitance

(uf)

240VAC

Thermal time constant

(s)

Dissipation factor

(mw/)

Temperature

Range

()

Approvals

UL/CUL

Maximum steady-state current at 25  Imax

Iss

1D-11

1

0.1205

2600

5

5

 

 

<55

>13

-40 ~ +170

1.5D-11

1.5

0.126

2600

5

5

 

 

2.5D-11

2.5

0.126

2700

5

5

270

68

3D-11

3

0.1263

2700

5

5

270

68

4D-11

4

0.2005

2700

4

4

820

220

5D-11

5

0.2052

2700

4

4

820

220

6D-11

6

0.2977

2700

3

3

1200

330

7D-11

7

0.2824

2800

3

3

1200

330

8D-11

8

0.2591

2800

3

3

1200

330

10D-11

10

0.2676

2800

3

3

1200

330

12D-11

12

0.3467

2800

2

2

1200

330

15D-11

15

0.485

3000

2

2

1200

330

16D-11

16

0.5

3000

2

2

1200

330

20D-11

20

0.59

3000

2

2

1200

330

22D-11

22

0.5903

3000

2

2

1200

330

25D-11

25

0.602

3000

1.5

1.5

1200

330

30D-11

30

0.722

3000

1.5

1.5

1200

330

33D-11

33

0.795

3000

1.5

1.5

1200

330

47D-11

47

1.165

3200

2

2

1200

330

50D-11

50

1.241

3200

2

2

1200

330

60D-11

60

1.489

3200

1

1

1200

330

80D-11

80

1.986

3200

1

1

1500

390

120D-11

120

2.979

3200

0.8

0.8

1500

390

 

 

15.Main technical parameters of D-13

type

Rated zero-power resistance R25 (Ω)

residual resistance under maximum steady-state current at 25 (Ω)

B25/85

(k)

Current

(A)

Max load capacitance

(uf)

120VAC

Max load capacitance

(uf)

240VAC

Thermal time constant

(s)

Dissipation factor

(mw/)

Temperature

Range

()

Approvals

UL/CUL

Maximum steady-state current at 25  Imax

Iss

1.3D-13

NTC thermistor 1

Member Information

zhengli group company limited
Country/Region:Guang Dong - China
Business Nature:Manufacturer
Phone:15989620927
Contact:fanli (sales)
Last Online:23 Mar, 2016

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