SURFACE MOUNT ZENER DIODE

SURFACE MOUNT ZENER DIODE

MDS0208021B

Page3

RATING AND CHARACTERISTICS CURVES

CZRA4740 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

234

5

6789

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

34

567

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

SMD DIODE SPECIALIST

COMCHIP

Comchip Technology Corporation • Tel: 510-657-8671 • Fax: 510-657-8921 • www.comchiptech.com