SMD Zener Diode
Page 4
REV:E
RATING AND CHARACTERISTIC CURVES ( CZRA4728-G Thru. CZRA4764-G)
QW-BZ004
Junction to lead thermal, (mV/°C/W)
175
150
125
100
75
50
25
0
Lead length to heat sink, (Inches)
0 0.1 0.2
0.3
0.4 0.5 0.6 0.7 0.8 0.9 1.0
Temperature Coefficient, (mV/°C)
FIG 3A. Range for Units to 12 Volts
12
10
8
6
4
2
0
-2
-4
2
3
4
5 6
7
8 9 10
Zener Voltage, (V)
-4
-2
0
2
4
6
3
4
5 6
7
8
Zener Voltage, (V)
Temperature Coefficient, (mV/°C)
Note: Below 3V and above 8V changes
in Zener Voltage do not affect temperature
VZ@IZT
O
TA=25 C
20mA
1mA
0.01mA
FIG 5. Typical Thermal Resistance
Zener Current,(mA)
1
Dynamic impedance, (OHMs)
4
1
10
Nominal Vz, (V)
FIG 6. Effect of Zener Current
Capacitance, (pF)
Range
VZ@IZT
11 12
Range
VZ@IZT
10
50
100
1
10
100
Temperature Coefficient, (mV/°C)
FIG 3B. Range for Units 12 to 100 Volts
Zener Voltage, (V)
FIG 4. Temperature Coefficients (-55°C to +150°C temperature change ; 90% of the units are in the ranges indicated.)
1
10
100
1000
IZ=1mA
IZ=5mA
IZ=20mA
TJ=25°C
IZ(ms)=0.1IZ(do)
f=60HZ
10 100
0V bias
1V bias
10
100
400
100
50% of breakdown
bias
Versus Lead
Company reserves the right to improve product design , functions and reliability without notice.
