1N2970 thru 1N3015B
and 1N3993 thru 1N4000A
10 WATT ZENER DIODES
SCOTTSDALE DIVISION
NOTES:
1.
2.
3.
4.
1N3993 - 1N4000 series: suffix A indicates +/-5% tolerance, no suffix indicates +/-10% tolerance. 1N2970 鈥?1N3015 series: suffix B
indicates +/- 5% tolerance, suffix A indicates +/-10%, no suffix indicates +/-20% tolerance. If tighter tolerance is required, consult
factory.
o
The electrical characteristics are measured after allowing the device to stabilize for 90 seconds with 30 C Base temperature.
The zener impedance (Z
ZT
) is derived from the 60 Hz ac voltage, which results when an 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
. When making zener impedance measurements at the I
ZK
test point, it may
be necessary to insert a 60 Hz band pass filter between the diode and voltmeter to avoid errors resulting from low level noise signals. A
curve showing the variation of zener impedance vs. zener current for three representative types is shown in Figures 2 and 3. Also see
Microsemi MicroNote 202.
These values of I
ZM
may be exceeded in the case of individual diodes. The values shown are calculated for the worst case that is a unit
of +/-5% tolerance at the high voltage end of its tolerance range. Allowance has also been made for the rise in zener voltage above V
ZT
,
which results from zener impedance and the increase in junction temperature as power dissipation approaches 10 watts.
WWW .
Microsemi
.C
OM
GRAPHS
Pd Rated Power Dissipation - Watts
Stud Temperature ( C)
o
FIGURE 1
Power Derating Curve
1N2970 鈥?1N3015B
1N3993 鈥?1N4000A
FIGURE 2
Typical Zener Impedance vs. Zener Current
For Types Shown
Copyright
錚?/div>
2003
11-12-2003 REV A
FIGURE 3
Typical Zener Impedance vs. Zener Current
For Types Shown
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
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