1N4745A datasheet(2/3 Pages) ETC2

номер детали	1N4745A

подробное описание детали	Transient Voltage Suppressor

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1N4728A thru 1N4751A

Document Number: 1N4728A thru 1N4751A

www.smsemi.com

Feb.29, 2012

2

Electrical Characteristics @ 25°C (Unless Otherwise Noted)

Note:

1.

The JEDEC type numbers shown with an A suffix have a 5% tolerance on nominal zener voltage. No suffix signifies a 10%

tolerance, C signifies 2%, and D signifies 1% tolerance.

2.

The Zener impedance is derived from the 60 HZ ac voltage that results when an ac current having an rms value equal to 10%

of the dc Zener current (IZT or IZK ) is superimposed on IZT or IZK. Zener impedance is measured at two points to ensure a

sharp knee on the breakdown curve and eliminate unstable units.

3.

The reverse surge current is measured at 25°C ambient using a 1/2 square wave or equivalent sine wave pulse 1/120 second

duration superimposed on IZT.

4.

Zener voltage (VZ) is measured at TL=25°C (+8,-2°C) and 90 seconds after application of dc current.

JEDEC

Type

Number

(Note1)

Zener

Voltage

VZ @

IZT

(Note4)

Test

Current

Maximum

Dynamic

Impedance

(Note2)

ZZT @ IZT

Maximum

Knee

Impedance

ZZk @ IZk

Maximum

Regulator

Current

TA=50°C

Knee

Current

Maximum

Reverse

Current

IR @ VR

Maximum

Surge

Current

(Note3)

VZ

(V)

IZT

(mA)

ZZT

(Ohms)

ZZK

(Ohms)

IZM

(mA)

IZK

(mA)

IR

(µA)

VR

(V)

Izsm

(mA)

1N4728A

1N4729A

1N4730A

1N4731A

3.3

3.6

3.9

4.3

76.0

69.0

64.0

58.0

10.0

9.0

400

276

252

234

217

1.00

100

50

10

1.0

1380

1260

1190

1070

1N4732A

1N4733A

1N4734A

1N4735A

4.7

5.1

5.6

6.2

53.0

49.0

45.0

41.0

8.0

7.0

5.0

2.0

500

550

600

700

193

178

162

146

1.00

10

1.0

2.0

3.0

970

890

810

730

1N4736A

1N4737A

1N4738A

1N4739A

6.8

7.5

8.2

9.1

37.0

34.0

31.0

28.0

3.5

4.0

4.5

5.0

700

133

121

110

100

1.00

0.50

10

4.0

5.0

6.0

7.0

660

605

550

500

1N4740A

1N4741A

1N4742A

1N4743A

10.0

11.0

12.0

13.0

25.0

23.0

21.0

19.0

7.0

8.0

9.0

10.0

700

91

83

76

69

0.25

10

5

7.6

8.4

9.1

9.9

454

414

380

344

1N4744A

1N4745A

1N4746A

1N4747A

15.0

16.0

18.0

20.0

17.0

15.5

14.0

12.5

14.0

16.0

20.0

22.0

700

750

61

57

50

45

0.25

5

11.4

12.2

13.7

15.2

304

285

250

225

1N4748A

1N4749A

1N4750A

1N4751A

22.0

24.0

27.0

30.0

11.5

10.5

9.5

8.5

23.0

25.0

35.0

40.0

750

1000

41

38

34

30

0.25

5

16.7

18.2

20.6

22.8

205

190

170

150

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