1N4728A Series
a. Range for Units to 12 Volts
θV
Z , TEMPERATURE COEFFICIENT (mV/°C)
θV
Z , TEMPERATURE COEFFICIENT (mV/°C)
+12
+10
+8
+6
+4
+2
0
-2
-4
2
3
4
5
6
7
8
9
V
Z
, ZENER VOLTAGE (VOLTS)
10
11
12
RANGE
V
Z
@ I
ZT
100
70
50
30
20
10
7
5
3
2
1
10
20
30
50
V
Z
, ZENER VOLTAGE (VOLTS)
70
100
RANGE
V
Z
@ I
ZT
b. Range for Units to 12 to 100 Volts
Figure 2. Temperature Coefficients
(–55°C to +150°C temperature range; 90% of the units are in the ranges indicated.)
θ
JL , JUNCTION TO LEAD THERMAL RESISTANCE (mV/°C/W)
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
θV
Z , TEMPERATURE COEFFICIENT (mV/°C)
175
+6
+4
+2
0
-2
-4
V
Z
@ I
Z
T
A
= 25°C
20 mA
0.01 mA
1 mA
NOTE: BELOW 3 VOLTS AND ABOVE 8 VOLTS
NOTE:
CHANGES IN ZENER CURRENT DO NOT
NOTE:
EFFECT TEMPERATURE COEFFICIENTS
3
4
5
6
7
8
V
Z
, ZENER VOLTAGE (VOLTS)
L, LEAD LENGTH TO HEAT SINK (INCHES)
Figure 3. Typical Thermal Resistance
versus Lead Length
100
70
50
30
20
10
7
5
3
2
1
0.01
10% DUTY CYCLE
20% DUTY CYCLE
5% DUTY CYCLE
Figure 4. Effect of Zener Current
Ppk , PEAK SURGE POWER (WATTS)
11 V-100 V NONREPETITIVE
3.3 V-10 V NONREPETITIVE
RECTANGULAR
WAVEFORM
T
J
= 25°C PRIOR TO
INITIAL PULSE
0.02
0.05
0.1
0.2
0.5
This graph represents 90 percentile data points.
For worst case design characteristics, multiply surge power by 2/3.
1
2
5
PW, PULSE WIDTH (ms)
10
20
50
100
200
500
1000
Figure 5. Maximum Surge Power
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