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JAN1N3997A View Datasheet(PDF) - Microsemi Corporation

Part Name
Description
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JAN1N3997A
Microsemi
Microsemi Corporation Microsemi
JAN1N3997A Datasheet PDF : 4 Pages
1 2 3 4
SCOTTSDALE DIVISION
1N2970 thru 1N3015B
and 1N3993 thru 1N4000A
10 WATT ZENER DIODES
NOTES: 1.
2.
3.
4.
1N3993 - 1N4000 series: suffix A indicates +/-5% tolerance, no suffix indicates +/-10% tolerance. 1N2970 – 1N3015 series: suffix B
indicates +/- 5% tolerance, suffix A indicates +/-10%, no suffix indicates +/-20% tolerance. If tighter tolerance is required, consult
factory.
The electrical characteristics are measured after allowing the device to stabilize for 90 seconds with 30oC Base temperature.
The zener impedance (ZZT) 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 (IZT or IZK) is superimposed on IZT or IZK. When making zener impedance measurements at the IZK 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 IZM 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 VZT,
which results from zener impedance and the increase in junction temperature as power dissipation approaches 10 watts.
GRAPHS
Stud Temperature (oC)
FIGURE 1
Power Derating Curve
FIGURE 2
Typical Zener Impedance vs. Zener Current
For Types Shown
FIGURE 3
Typical Zener Impedance vs. Zener Current
For Types Shown
Copyright 2003
11-12-2003 REV A
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
 

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