UMMSZ52XXB

Preliminary

ZENER DIODE

UNISONICTECHNOLOGIESCO.,LTD

3 of 4

www.unisonic.com.tw

QW-R601-085.d



ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

RATINGS

UNIT

Peak Forward Surge Current, 8.3ms Single Half

Sine-Wave Superimposed on Rated Load (Note 2)

4.0

A

Power Dissipation at 75°C (Note 1)

SOD-123/LL-34

500

mW

SOD-323

330

SOD-523

250

SOT-23-3

200

Operating Junction Temperature

-55~+150

°C

Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

2. Mounted on 5.0mm

3. Measured on 8.3ms, single half sine-wave or equivalent square wave, duty cycle=4 pulses per minute

maximum.



ELECTRICAL CHARACTERISTICS

Device

Marking

Code

Nominal Zener Voltage

Zener Impedance

Reverse Leakage

Current

Zener

Current

MIN

TYP

mA

UMMSZ5228B

3.9

3.71

3.9

4.1

23

20

1900

0.25

10

1.0

115

UMMSZ5231B

5.1

4.85

5.1

5.36

17

20

1600

0.25

5.0

2.0

89

UMMSZ5232B

5.6

5.32

5.6

5.88

11

20

1600

0.25

5.0

3.0

81

UMMSZ5234B

6.2

5.89

6.2

6.51

7

20

1000

0.25

5.0

4.0

73

UMMSZ5236B

7.5

7.13

7.5

7.88

6.0

20

500

0.25

3.0

6.0

61

UMMSZ5237B

8.2

7.79

8.2

8.61

8

20

500

0.25

3.0

6.0

55

UMMSZ5243B

13

12.35

13

13.65

13

9.5

600

0.25

1.0

9.9

35

UMMSZ5245B

15

14.25

15

15.75

16

8.5

600

0.25

0.5

11

30

UMMSZ5248B

18

17.1

18

18.9

21

7

600

0.25

0.1

14

25

UMMSZ5250B

20

19

20

21

25

6.2

600

0.25

0.1

15

23

UMMSZ5251B

22

20.9

22

23.1

29

5.6

600

0.25

0.1

17

21

UMMSZ5254B

27

25.65

27

28.35

41

5

600

0.25

0.1

21

16.8

UMMSZ5257B

33

31.35

33

34.65

58

3.8

700

0.25

0.1

25

13.8