1N3305 thru 1N3350B
and 1N4549B thru 1N4556B
50 WATT ZENER DIODES
SCOTTSDALE DIVISION
DESCRIPTION
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.
APPEARANCE
WWW .
Microsemi
.C
OM
DO- 5
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
(DO-203AB)
FEATURES
•
•
•
•
•
JEDEC registered 1N3305 thru 1N3350B and
1N4549 thru 1N4556B
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.
Standard polarity is anode to case
Reverse polarity with cathode to case by
designating R suffix in part number, e.g.
1N3305RB, etc.
Consult factory for surface mount equivalents
•
•
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 no
suffix
Consult factory for +/-2% or +/-1% with a C or D
suffix respectively
Reverse polarity available
Nonsensitive to ESD per MIL-STD-750 Method
1020
Inherently radiation hard as described in
Microsemi MicroNote 050
•
•
•
•
•
•
•
MAXIMUM RATINGS
•
•
•
•
•
•
Junction & Storage Temperatures: -65
o
C to +175
o
C
DC Power Dissipation: 50 watts at T
C
< 75
o
C
Power Derating: 0.5 W/
o
C above 75
o
C
Forward Voltage @ 10 A: 1.5 Volts
THERMAL RESISTANCE: 2.0
o
C/W maximum
junction to hexagonal base (1.5
o
C/W typical)
Solder temperatures: 260
o
C for 10 s (max)
•
MECHANICAL AND PACKAGING
CASE: Industry Standard DO-5 (DO-203AB),
11/16 inch hexagonal stud with 1/4-28 threads
welded hermetically sealed metal and glass
FINISH: All external surfaces are corrosion
resistant and terminal solderable.
POLARITY: Standard Polarity units are connected
anode to case. Reverse polarity (cathode to case)
is indicated by Suffix R in part number
WEIGHT: 15 grams
MOUNTING HARDWARE: Consult factory for
optional insulator, bushing, solder terminal,
washers and nut
See package dimensions on last page
•
•
1N3305 – 1N3350B
350B
1N4549B – 1N4556B
1N4549B – 1N4556B
•
•
•
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 1
1N3305 thru 1N3350B
and 1N4549B thru 1N4556B
50 WATT ZENER DIODES
SCOTTSDALE DIVISION
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.
Zener Voltage (
V
Z
) is measured with junction in thermal equilibrium with 30 C stud temperature.
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 (I
ZT
or I
ZK
) is superimposed on I
ZT
or I
ZK
. 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.
o
WWW .
Microsemi
.C
OM
2.
3.
OUTLINE AND CIRCUIT
Rated Power Dissipation - Watts
Stud Temperature C
o
FIGURE 1
Power Derating Curve
FIGURE 2
Typical Zener Impedance
vs. Zener Current
PACKAGE DIMENSIONS
1N3305 – 1N3350B
350B
1N4549B – 1N4556B
1N4549B – 1N4556B
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
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Microsemi
:
1N3324A 1N3329A 1N3349B 1N3316A 1N3343RB 1N3331RB 1N3347B 1N4556B 1N3316RA 1N3334RB
1N3330B 1N3318B 1N3335B 1N3312RB 1N3326A 1N3329B 1N3314A 1N3314B 1N3319RB 1N3310RA
1N3341RB 1N3313RB 1N3328B 1N3316B 1N3320B 1N3343B 1N4549RB 1N4553RB 1N4555RB 1N3338A
1N3318RB 1N3341B 1N4555B 1N3333A 1N3323A 1N3350B 1N3327B 1N3306B 1N3319B 1N3346B 1N3334A
1N3312A 1N3329RB 1N3315B 1N3326B 1N3344A 1N4556RB 1N3325B 1N4550RB 1N3340RB 1N3323RA
1N3331A 1N3311A 1N3338RB 1N3344B 1N3337B 1N3348RB 1N4552RB 1N3319A 1N3343A 1N3305RB
1N3315A 1N4550B 1N3322RA 1N3312RA 1N3320A 1N3310B 1N3314RA 1N3311RA 1N3342RB 1N3332A
1N3308RA 1N3310RB 1N3312B 1N3328A 1N3320RB 1N3322B 1N3313A 1N3321RA 1N3311RB 1N3342B
1N4551RB 1N3325A 1N3314RB 1N3310A 1N3321RB 1N3317A 1N3344RB 1N3337RB 1N3336RB 1N3339RB
1N3333B 1N3340B 1N3342A 1N3307RA 1N3305A 1N3308RB 1N3336A 1N4552B 1N3313RA
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