50 WATT ZENER DIODES
S C O T T S D A L E D I V I S I O N
1N3305 thru 1N3350B
and 1N4549B thru 1N4556B
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
1
N
3
3
0
5
1
N
3
3
5
0
B
1
N
4
5
4
9
B
1
N
4
5
5
6
B
3
5
0
B
1
N
4
5
4
9
B
1
N
4
5
5
6
B
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
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
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
MECHANICAL AND PACKAGING
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)
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
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright
2003
11-12-2003 REV A
50 WATT ZENER DIODES
S C O T T S D A L E D I V I S I O N
1N3305 thru 1N3350B
and 1N4549B thru 1N4556B
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
1
N
3
3
0
5
1
N
3
3
5
0
B
1
N
4
5
4
9
B
1
N
4
5
5
6
B
*ELECTRICAL CHARACTERISTICS @ 30
o
C Case Temperature
MAX. DYNAMIC
IMPEDANCE (Note 3)
MAX. REVERSE
CURRENT**
I
R
(max) @ V
R
JEDEC
TYPE NO.
(Note 1)
NOMINAL
ZENER
VOLTAGE
V
Z
@
I
ZT
Volts
(Note 2)
ZENER
TEST
CURRENT
(
I
ZT
) mA
Z
ZT
@ I
ZT
OHMS
Z
ZK
@ I
ZK
= 5 mA
OHMS
MAX. DC
ZENER
CURRENT
(
I
ZM
)
mA
A
VOLTS
TYPICAL
TEMP.
COEFF.
VZ
%/
o
C
1N4549B
1N4550B
1N4551B
1N4552B
1N4553B
1N4554B
1N4555B
1N4556B
3.9
4.3
4.7
5.1
5.6
6.2
6.8
7.5
3,200
2,900
2,650
2,450
2,250
2,000
1,850
1,650
0.16
0.16
0.12
0.12
0.12
0.14
0.16
0.24
400
500
600
650
900
1,000
200
100
11,900
10,650
9,700
8,900
8,100
7,300
6,650
6,050
150
150
100
20
20
20
10
10
0.5
0.5
1.0
1.0
1.0
2.0
2.0
3.0
-0.046
-0.033
-0.015
+/-0.010
+0.030
+0.049
+0.053
+0.057
1N3305B
1N3306B
1N3307B
1N3308B
1N3309B
1N3310B
6.8
7.5
8.2
9.1
10.0
11.0
1,850
1,700
1,500
1,370
1,200
1,100
0.20
0.30
0.40
0.50
0.60
0.80
70
70
70
70
80
80
6,600
5,900
5,200
4,800
4,300
3,900
300
125
50
25
25
10
4.5
5.0
5.4
6.1
6.7
8.4
0.040
0.045
0.048
0.050
0.055
0.060
1N3311B
1N3312B
1N3313B
1N3314B
1N3315B
1N3316B
12.0
13.0
14.0
15.0
16.0
17.0
1,000
960
890
830
780
740
1.00
1.10
1.20
1.40
1.60
1.80
80
80
80
80
80
80
3,800
3,300
3,000
2,800
2,650
2,500
10
10
10
10
10
10
9.1
9.9
11.4
11.4
12.2
13.0
0.065
0.065
0.070
0.070
0.070
0.075
1N3317B
1N3318B
1N3319B
1N3320B
1N3321B
1N3322B
18.0
19.0
20.0
22.0
24.0
25.0
700
660
630
570
520
500
2.00
2.20
2.40
2.50
2.60
2.70
80
80
80
80
80
90
2,300
2,200
2,100
1,900
1,750
1,550
10
10
10
10
10
10
13.7
13.7
15.2
16.7
18.2
18.2
0.075
0.075
0.075
0.080
0.080
0.080
1N3323B
1N3324B
1N3325B
1N3326B
1N3327B
1N3328B
27.0
30.0
33.0
36.0
39.0
43.0
460
420
380
350
320
290
2.80
3.00
3.20
3.50
4.00
4.50
90
90
90
90
90
90
1,500
1,400
1,300
1,150
1,050
975
10
10
10
10
10
10
20.6
22.8
25.1
27.4
29.7
32.7
0.085
0.085
0.085
0.085
0.090
0.090
1N3329B
1N3330B
1N3331B
1N3332B
1N3333B
1N3334B
45.0
47.0
50.0
51.0
52.0
56.0
280
270
250
245
240
220
4.50
5.00
5.00
5.20
5.50
6.00
100
100
100
100
100
110
930
880
830
810
790
740
10
10
10
10
10
10
32.7
35.8
38.8
38.8
42.6
42.6
0.090
0.090
0.090
0.090
0.090
0.090
1N3335B
1N3336B
1N3337B
1N3338B
1N3339B
1N3340B
62.0
68.0
75.0
82.0
91.0
100.0
200
180
170
150
140
120
7.00
8.00
9.00
11.00
15.00
20.00
120
140
150
160
180
200
660
600
540
490
420
400
10
10
10
10
10
10
47.1
51.7
56.0
62.2
69.2
76.0
0.090
0.090
0.090
0.090
0.090
0.090
1N3341B
1N3342B
1N3343B
1N3344B
1N3345B
1N3346B
105.0
110.0
120.0
130.0
140.0
150.0
120
110
100
95
90
85
25.00
30.00
40.00
50.00
60.00
75.00
210
220
240
275
325
400
380
365
335
310
290
270
10
10
10
10
10
10
83.0
83.0
91.2
99.8
114.0
114.0
0.095
0.095
0.095
0.095
0.095
0.095
1N3347B
1N3348B
1N3349B
1N3350B
160.0
175.0
180.0
200.0
80
70
68
65
80.00
85.00
90.00
100.00
450
500
525
600
250
230
220
200
10
10
10
10
121.6
121.6
136.8
152.0
0.095
0.095
0.095
0.100
*JEDEC Registered Data. **Not JEDEC Data.
Have JAN and JANTX and TXV Qualifications to MIL-S-19500/358.
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright
2003
11-12-2003 REV A
50 WATT ZENER DIODES
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
Copyright
2003
11-12-2003 REV A
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
S C O T T S D A L E D I V I S I O N
1N3305 thru 1N3350B
and 1N4549B thru 1N4556B
1
N
3
3
0
5
1
N
3
3
5
0
B
1
N
4
5
4
9
B
1
N
4
5
5
6
B
3
5
0
B
1
N
4
5
4
9
B
1
N
4
5
5
6
B
See further notes on following page
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
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,
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.
20 volt unit having a +/-5% tolerance on Zener Voltage.
2.
Zener Voltage (
V
Z
) is measured with junction in thermal equilibrium with 30
o
C stud temperature.
2.
Zener Voltage (
V
Z
) is measured with junction in thermal equilibrium with 30
o
C 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 (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.
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 (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.
OUTLINE AND CIRCUIT
Rated Po
w
e
r Dissipation - W
a
tts
Stud Temperature
o
C
FIGURE 1
Power Derating Curve
FIGURE 2
Typical Zener Impedance
vs. Zener Current
PACKAGE DIMENSIONS
All Dimensions in: INCH
mm
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