1SMA4738 datasheet(4/4 Pages) TSC

Part #	1SMA4738

Description	1.0 Watt Surface Mount Silicon Zener Diodes

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Manufacturer	TSC [Taiwan Semiconductor Company, Ltd]

Direct Link	http://www.taiwansemi.com

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RATINGS AND CHARACTERISTIC CURVES (1SMA4737 THRU 1SMA200Z)

Version:H11

FIG.6 TYPICAL CAPACITANCE versus Vz

10

100

1000

1

10

100

Vz, FORWARD VOLTAGE (V)

50% OF BREAKDOWN

0V BIAS

1.0V BIAS

FIG. 7 TEMPERATURE COEFFICIENTS

-4

-2

0

2

4

6

8

10

12

23

45

678

9

10

11

12

Vz, ZENER VOLTAGE(V)

a-RANGE FOR UNITS TO 12 VOLTS

RANGE Vz@ IZT

FIG.8 TEMPERATURE COEFFICIENTS

1

10

100

10

100

Vz, ZENER VOLTAGE(V)

RANGE Vz@ IZT

b-RANGE FOR UNITS 12 TO 100 VOLTS

FIG. 9 EFFECT OF ZENER CURRENT

-4

-2

0

2

4

6

3

3.5

4

4.5

5

5.5

6

6.5

7

7.5

8

Vz, ZENER VOLTAGE(V)

NOTE:BELOW 3 VOLTAGE ABOVE a

VOLTS CHANGES IN ZENER CURRENT

NOT AFFECT TEMPERATURE

Vz@ IZT

TA=25℃

0.01mA

1 mA

20mA

FIG.10 MAXIMUM SURGE POWER

1

10

100

0.01

0.1

1

10

100

1000

PW, PULSE WIDTH (ms)

20% DUTY CYCLE

11V-91V NON-REPETITIVE

10% DUTY CYCLE

5% DUTY CYCLE

0.8V-10V NON-REPETITIVE

RECTANGULAR WAVEFORM

TA=25℃ PRIOR TO INITIAL PULSE

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