1N2980中文资料

DO-4

(DO-203AA) website: https://www.wendangku.net/doc/db12870830.html,

APPLICATIONS / BENEFITS

Regulates voltage over a broad operating current and temperature range

Standard voltage tolerances are +/- 5% with B

suffix, +/-10% with an A suffix, and +/-20% with Consult factory for +/-2% or +/-1% voltage

?Have JAN and JANTX Qualifications to MIL-PRF-19500/124. See further notes on following page

1N3993 – 1N4000A

NOTES: 1. 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.

2. The electrical characteristics are measured after allowing the device to stabilize for 90 seconds with 30o

C Base temperature.

3. 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.

4. 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.

FIGURE 1

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

Stud Temperature (o

C) Power Derating Curve

FIGURE 2

FIGURE 3

Typical Zener Impedance vs. Zener Current

Typical Zener Impedance vs. Zener Current

For Types Shown

For Types Shown

10-32 UNF-2A (MOD) PITCH DIA. MIN. .1658 MAX. .1697 TO WITH- STAND A TORQUE UP TO 30 IN-LB. WHEN NUT IS TIGHTENED ON STUD All dimensions in: INCH

mm