1N4553B 데이터 시트보기 (PDF) - Microsemi Corporation

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1N4553B

50 WATT ZENER DIODES

Microsemi Corporation 

SCOTTSDALE DIVISION

1N3305 thru 1N3350B

and 1N4549B thru 1N4556B

50 WATT ZENER DIODES

See further notes on following page

NOTES:

1. When using JEDEC numbers an R suffix should be used to signify reversed polarity. The suffixes A and B indicate tolerances

of 10% and 5% respectively. No suffix or just R denotes +/-20% tolerance. Example: 1N3319RB is a REVERSED polarity,

20 volt unit having a +/-5% tolerance on Zener Voltage.

2. Zener Voltage (VZ) is measured with junction in thermal equilibrium with 30oC stud temperature.

3. The Zener impedance is derived from the 60 cycle 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. Zener impedance is measured at 2 points to ensure a

sharp knee on the breakdown curve and to eliminate unstable units. A curve showing the variation of zener impedance vs.

zener current for three representative types is shown in Figure 2. Also see Microsemi MicroNote 202.

OUTLINE AND CIRCUIT

Stud Temperature oC

FIGURE 1

Power Derating Curve

FIGURE 2

Typical Zener Impedance

vs. Zener Current

PACKAGE DIMENSIONS

All Dimensions in: INCH

mm

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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