1N3305 thru 1N3350B
and 1N4549B thru 1N4556B
50 WATT ZENER DIODES
S C O T T S D A L E D I V I S I O N
DESCRIPTION
APPEARANCE
These high power 50 W Zener diodes represented by the JEDEC
registered 1N3305 thru 1N3350B and 1N4549 thru 1N4556B series provide
voltage regulation in a selection over a 3.9 V to 200 V broad range of
voltages. They may be operated up to 50 W with adequate mounting and
heat sinking with their low thermal resistance. These Zeners are also
available in JAN, JANTX, JANTXV military qualifications. Microsemi also
offers numerous other Zener products to meet higher and lower power
applications.
DO- 5
(DO-203AB)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES
APPLICATIONS / BENEFITS
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JEDEC registered 1N3305 thru 1N3350B and
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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 no
suffix
1N4549 thru 1N4556B
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Internal solder bond construction
Hermetically sealed (welded)
Zener Voltage 3.9V to 200V.
Also available in JAN, JANTX, and JANTXV
qualifications per MIL-PRF-19500/358 by adding
the JAN, JANTX, or JANTXV prefixes to part
numbers for desired level of screening; (e.g.
JANTX1N3305B, JANTXV1N3318B, etc.
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Consult factory for +/-2% or +/-1% with a C or D
suffix respectively
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Reverse polarity available
Nonsensitive to ESD per MIL-STD-750 Method
1020
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Standard polarity is anode to case
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Inherently radiation hard as described in
Microsemi MicroNote 050
Reverse polarity with cathode to case by
designating R suffix in part number, e.g.
1N3305RB, etc.
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Consult factory for surface mount equivalents
MAXIMUM RATINGS
MECHANICAL AND PACKAGING
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Junction & Storage Temperatures: -65oC to +175oC
DC Power Dissipation: 50 watts at TC < 75 oC
Power Derating: 0.5 W/oC above 75oC
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CASE: Industry Standard DO-5 (DO-203AB),
11/16 inch hexagonal stud with 1/4-28 threads
welded hermetically sealed metal and glass
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FINISH: All external surfaces are corrosion
Forward Voltage @ 10 A: 1.5 Volts
resistant and terminal solderable.
THERMAL RESISTANCE: 2.0 oC/W maximum
junction to hexagonal base (1.5 oC/W typical)
POLARITY: Standard Polarity units are connected
anode to case. Reverse polarity (cathode to case)
is indicated by Suffix R in part number
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Solder temperatures: 260 oC for 10 s (max)
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WEIGHT: 15 grams
MOUNTING HARDWARE: Consult factory for
optional insulator, bushing, solder terminal,
washers and nut
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See package dimensions on last page
Copyright 2003
Microsemi
Page 1
11-12-2003 REV A
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503