APPEARANCE
DO-13
APPLICATIONS / BENEFITS Regulates voltage over a broad operating current
Wide selection from 6.8 to 200 V
Tight voltage tolerances available
Low reverse (leakage) currents
NOTES: 1. When using JEDEC numbers, B suffix signifies +/-5% tolerance on nominal zener voltage. The suffix A is used to identify +/-10% tolerance; no suffix indicates +/-20% tolerance: suffix C is used to identify +/- 2%; and suffix D is used to identify +/- 1% tolerance.
2. Zener Voltage (V Z) is measured with junction in thermal equilibrium with still air at a temperature of 25o C. The test currents (I ZT) at
nominal voltages provide a constant 0.25 watts.
3. The zener impedance is derived when a 60 cycle ac current having an rms value equal to 10% of the dc zener current (I ZT or
I ZK) is superimposed on I ZT or I ZK. Zener impedance is measured at 2 points to ensure a sharp knee on the breakdown curve
and to eliminate unstable units. See MicroNote 202 for variation in dynamic impedance with different zener currents.
4. These values of I ZM may often be exceeded in the case of individual diodes. The values shown are calculated for a unit at the high
voltage end of its tolerance range. Allowance has also been made for the rise in zener voltage above V ZT that results from zener
impedance and the increase in junction temperature as a unit approaches thermal equilibrium at a dissipation of 1 watt. The I ZM
values shown for +/-5% tolerance units may be used with little error for +/-10% tolerance units, but should be reduced by 7% to
include a +/-20% tolerance unit near the high voltage end of its tolerance range.
TEMPERATURE COEFFICIENT mV/o
C
T E M P E R A T U R E C
O E F F I C I E N T %/o
C
T L – Lead Temperature (o C) 3/8” from body NOMINAL ZENER VOLTAGE (VOLTS)
or T A on FR4 PC Board FIGURE 2
FIGURE 1
Typical Zener Voltage Temperature
Power Derating Curve Coeff. vs. Zener Voltage
FIGURE 3
Typical Capacitance vs. Reverse Voltage for 1-Watt Zeners
DO-13 (DO-202AA)
mV Change /o
C
Voltage Temperature
Coefficient %/o
C
P d - R A T E D P O W E R D I S S I P A T I O N (W A T T S )