1SMA4740 datasheet(3/5 Pages) CHENDA

Part #	1SMA4740

Description	SURFACE MOUNT ZENER DIODE

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Manufacturer	CHENDA [Microdiode Electronics (Jiangsu) Co.,Ltd.]

Direct Link	http://www.microdiode.com/en

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3 / 5 page

Rev:2019A0

Page :3

https://www.microdiode.com

Zener Voltage - 3.3 to 200 Volts Peak Pulse Power - 1.0 W

1SMA4728A THRU 1SMA200A

FIG.1- POWER TEMPERATURE DERATING CURVE

FIG.2- TYPICAL FORWARD CHARACTERISTICS

FIG.3- EFFECT OF ZENER CURRENT

ON ZENER IMPEDANCE

FIG.5- TYPICAL LEAKAGE CURRENT

FIG.4- EFFECT OF ZENER VOLTAGE

ON ZENER IMPEDANCE

o

AMBIENT TEMPERATURE( C)

VF, FORWARD VOLTAGE (VOLTS)

Z

I, ZENER CURRENT (mA)

Z

I, ZENER CURRENT (mA)

Z

V, NOMINAL ZENER VOLTAGE (VOLTS)

0

20

40

60

80

100

120

140

160

180

200

MINIMUM

MAXIMUM

o

70 C

o

150 C

o

25 C

o

0C

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.0

2.0

5.0

10

20

50

100

200

500

1000

T= 25 C

I (rms)= 0.1 I

ZZ

(dc)

f = 1KHz

J

o

47V

27V

0.8V

0.1

0.25

0.50

0.75

1.0

1.25

0.2

0.5

1.0

2.0

5.0

10

20

50

100

1.0

2.0

5.0

10

20

50

100

200

500

1000

1.0

T= 25 C

I (rms)= 0.1 I

ZZ

(dc)

f = 1KHz

J

o

IZ = 1.0mA

5.0mA

20mA

2.0

3.0

5.0 7.0 10

20

30

50 70 100

1.0

2.0

5.0

7.0

10

20

50

70

100

200

500

700

1000

TYPICAL LEAKAGE CURRENT

AT 80% OF NOMINAL

BREAKDOWN VOLTAGE

o

+125 C

o

+25 C

3.0

4.0

5.0 6.0

7.0

8.0 9.0

10

11

12

13

14 15

0.001

0.002

0.005

0.007

0.01

0.02

0.05

0.07

0.1

0.2

0.5

0.7

1.0

2.0

5.0

7.0

10

20

50

70

100

200

500

700

1000

2000

5000

7000

10000

FIG.6- TYPICAL CAPACITANCE versus Vz

FIG.7- TEMPERATURE COEFFICIENTS

10

VZ, FORWARD VOLTAGE (VOLTS)

VZ, ZENER VOLTAGE (VOLTS)

0V BIAS

1.0V BIAS

50% OF BREAKDOWN BIAS

1.0

100

4

8

10

100

200

300

400

a-RANGE FOR UNITS TO 12 VOLTS

V@

ZZ

I T

RANGE

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10

11

12

-2.0

-4.0

0

+2.0

+4.0

+6.0

+8.0

+10

+12

The cruve graph is for reference only

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