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1N4749A Fiches technique(PDF) 2 Page - Frontier Electronics.

No de pièce 1N4749A
Description  1WATT ZENER DIODE
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Fabricant  FRONTIER [Frontier Electronics.]
Site Internet  http://www.frontierusa.com
Logo FRONTIER - Frontier Electronics.

1N4749A Fiches technique(HTML) 2 Page - Frontier Electronics.

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1N4736A THRU 1N4764A
Page: 1
Figure 3. Typical Thermal Resistance versus Lead Length
1000
700
500
200
100
70
50
20
10
7
5
2
1
1
2 3
5
7
10
20
30
50 70
100
VZ, ZENER CURRENT (mA)
Iz=1mA
5mA
20mA
Tj=25ºC
Iz(ms)=0.1Iz(do)
f=60hz
Figure 4. Effect of Zener Current
400
300
200
100
50
20
10
8
4
1
2
5
10
20
50
100
VZ, NOMINAL VZ (VOLTS)
50%OF BREAKDOWN BIAS
0VBIAS
0VBIAS
FIG.1A- Range for Units to 12 Volts
+12
+10
+8
+6
+4
+2
0
-2
-4
2
3
4
5
6
7
8
9
10
11 12
VZ, ZENER VOLTAGE (VOLTS)
RANGE
VZ@IZT
FIG.1B- Range for Units to 12 to 100 Volts
100
70
50
30
20
10
7
5
3
2
1
10
20
30
50
70
100
VZ, ZENER VOLTAGE (VOLTS)
RANGE
VZ@IZT
175
150
125
100
75
50
25
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
L, LEAD LENGTH TO HEAT SINK (INCHES)
Figure 2. Temperature Coefficients (-55ºC to+150ºC temperature change; 90% of the units are in the ranges indicated.)
+6
+4
+2
0
-2
-4
3
4
5
6
7
8
20mA
1mA
0.01mA
VZ@IZ
TA=25ºC
NOTE: BELOW 3 VOLTS AND ABOVE 8 VOLTS
CHANGES IN ZENER CURRENT DO NOT
EFFECT TEMPERATURE COEFFICIENTS
VZ, ZENER VOLTAGE (VOLTS)
1.25
1.0
0.75
0.5
0.25
Figure. 7 - Power Temperature Derating Curve
0
20
40
60
80
100
120
140
160
180
200
TL, LEAD TEMPERATURE (
OC)


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