SURFACE MOUNT ZENER DIODE

www.comchip.com.tw

SURFACE MOUNT ZENER DIODE

www.comchip.com.tw

COMCHIP

COMCHIP

MDS0208021A

Page3

RATING AND CHARACTERISTICS CURVES

CZRA4741 THRU CZRA4764

1.25

1.0

0.75

0.50

0.25

0

0

20

40

60 80 100 120 140 160 180 200

L = LEAD LENTGH TO

HEAT SINK

TL, LEAD TEMPERATURE

Fig. 1-POWER TEMPERATURE DERATING CURVE

RANGE

+12

+10

+8.0

+6.0

+4.0

+2.0

0

-2.0

-4.0

2

3

4

5

6

7

8

9

10 11 12

VZ, ZENER VOLTAGE (VOLTS)

100

70

50

30

20

10

7.0

5.0

3.0

2.0

1.0

10

20

30

50

70

100

RANGE

V

VZ, ZENER VOLTAGE (VOLTS)

Fig. 2-TEMPERATURE COEFFICIENTS

(-55°C TO +150°C TEMPERATURE RANGE; 90% OF THE UNITS ARE IN THE RANGES INDICATED.)

175

150

125

100

75

50

25

0

0

.1

.2

.3

.4

.5

.6

.7

.8

.9

1.0

L, LEAD LENGTH TO HEAT SINK (INCKES)

20mA

+6.0

+4.0

+2.0

0

-2.0

-4.0

3

4

5

6

7

8

TA = 25°C

1.0mA

0.01mA

NOTE:BELOW 3 VOLTS AND ABOVE 8

CHANGES IN ZENER CURRENT DO

AFFECT TEMPERATURE

VZ, ZENER VOLTAGE (VOLTS)

Fig.3-TYPICAL THERMAL RESISTANCE VERSUS LEAD

LENGTH

Fig. 4-EFFECT OF ZENER CURRENT