50 WATT ZENER DIODES
SCOTTSDALE DIVISION
1N3305 thru 1N3350B
a
n
d
1N4
5
4
9
B
t
hr
u
1N4
556
B
WWW.Microsemi .COM 1N3305 – 1N3350B
1N4549B – 1N4556B
350B
1N4549B – 1N4556B
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: -65oC to +175oC
• DC Power Dissipation: 50 watts at TC < 75 oC
• Power Derating: 0.5 W/oC above 75oC
• Forward Voltage @ 10 A: 1.5 Volts
• THERMAL RESISTANCE: 2.0 oC/W maximum
junction to hexagonal base (1.5 oC/W typical)
• Solder temperatures: 260 oC 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
SCOTTSDALE DIVISION
1N3305 thru 1N3350B
a
n
d
1N4
5
4
9
B
t
hr
u
1N4
556
B
WWW.Microsemi .COM 1N3305 – 1N3350B
1N4549B – 1N4556B
*ELECTRICAL CHARACTERISTICS @ 30oC Case Temperature
MAX. DYNAMIC
IMPEDANCE (Note 3) † MAX. REVERSE
CURRENT**
IR(max) @ VR
JEDEC
TYPE NO.
(Note 1)
NOMINAL
ZENER
VOLTAGE
VZ @ IZT
Volts
(Note 2) †
ZENER
TEST
CURRENT
(IZT) mA †
ZZT @ IZT
OHMS
ZZK @ IZK = 5 mA
OHMS
MAX. DC
ZENER
CURRENT
(IZM)
mA µA VOLTS
TYPICAL
TEMP.
COEFF.
αVZ
%/oC
†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
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N3305 thru 1N3350B
a
n
d
1N4
5
4
9
B
t
hr
u
1N4
556
B
1N3305 – 1N3350B
1N4549B – 1N4556B
350B
1N4549B – 1N4556B
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 (VZ) is measured with junction in thermal equilibrium with 30oC stud temperature.
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.
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
Rated Power Dissipation - Watts
Stud Temperature oC
FIGURE 1
Power Deratin
g
Curve
FIGURE 2
Typical Zener Impedance
vs. Zener Curren
t
PACKAGE DIMENSIONS
All Dimensions in: INCH
mm
