TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841
1-800-446-1158 / (978) 620-2600 / Fax: (978) 689-0803
Website: http: //www.microsemi.com
Gort Road Business Park, Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/358
DEVICES
LEVELS
1N3305B thru 1N3350B & RB
and
1N4549B thru 1N4556B & RB
B = Standard Polarity: RB = Reverse Polarity
JAN
JANTX
JANTXV
DESCRIPTION
These high power 50W Zener diodes represented by the JEDEC registered
1N3305B thru 1N3350B and 1N4549B thru 1N4556B series provide voltage
regulation in a selection over a 3.9V to 200V 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.
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
DO-5 (DO-203AB)
FEATURES
JEDEC registered 1N3305B thru 1N3350B and 1N4549B 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
T4-LDS-0077 Rev. 2 (101152)
Page 1 of 6
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841
1-800-446-1158 / (978) 620-2600 / Fax: (978) 689-0803
Website: http: //www.microsemi.com
Gort Road Business Park, Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
APPLICATIONS / BENEFITS
Regulates voltage over a broad operating current and temperature range
Standard voltage tolerances are +/- 5% with B suffix
Consult factory for +/-10% with an A suffix, +/-20% with no suffix, +/-2% with a C suffix and +/-1% with a 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°C to +175°C
DC Power Dissipation: 50 watts at T
C
< 75°C
Power Derating: 0.5 W/°C above 75°C
Forward Voltage @ 10A: 1.5 Volts
THERMAL RESISTANCE: 2.0°C/W maximum junction to hexagonal base (1.5°C/W typical)
Solder temperatures: 260°C for 10s (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
T4-LDS-0077 Rev. 2 (101152)
Page 2 of 6
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841
1-800-446-1158 / (978) 620-2600 / Fax: (978) 689-0803
Website: http: //www.microsemi.com
Gort Road Business Park, Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
ELECTRICAL CHARACTERISTICS @ 30oC Case Temperature
NOMINAL
ZENER
VOLTAGE
V
Z
@
I
ZT
Volts
(Note 2) †
3.9
4.3
4.7
5.1
5.6
6.2
6.8
7.5
6.8
7.5
8.2
9.1
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
22.0
24.0
25.0
27.0
30.0
33.0
36.0
39.0
43.0
45.0
47.0
50.0
51.0
52.0
56.0
62.0
68.0
75.0
82.0
91.0
100.0
105.0
110.0
120.0
130.0
140.0
150.0
160.0
175.0
180.0
200.0
ZENER
TEST
CURRENT
(
I
ZT
) mA †
3,200
2,900
2,650
2,450
2,250
2,000
1,850
1,650
1,850
1,700
1,500
1,370
1,200
1,100
1,000
960
890
830
780
740
700
660
630
570
520
500
460
420
380
350
320
290
280
270
250
245
240
220
200
180
170
150
140
120
120
110
100
95
90
85
80
70
68
65
MAX. DYNAMIC
IMPEDANCE (Note 3) †
Z
ZT
@
I
ZT
OHMS
0.16
0.16
0.12
0.12
0.12
0.14
0.16
0.24
0.20
0.30
0.40
0.50
0.60
0.80
1.00
1.10
1.20
1.40
1.60
1.80
2.00
2.20
2.40
2.50
2.60
2.70
2.80
3.00
3.20
3.50
4.00
4.50
4.50
5.00
5.00
5.20
5.50
6.00
7.00
8.00
9.00
11.00
15.00
20.00
25.00
30.00
40.00
50.00
60.00
75.00
80.00
85.00
90.00
100.00
Z
ZK
@ I
ZK
= 5 mA
OHMS
400
500
600
650
900
1,000
200
100
70
70
70
70
80
80
80
80
80
80
80
80
80
80
80
80
80
90
90
90
90
90
90
90
100
100
100
100
100
110
120
140
150
160
180
200
210
220
240
275
325
400
450
500
525
600
MAX. DC
ZENER
CURRENT
(
I
ZM
)
mA
11,900
10,650
9,700
8,900
8,100
7,300
6,650
6,050
6,600
5,900
5,200
4,800
4,300
3,900
3,800
3,300
3,000
2,800
2,650
2,500
2,300
2,200
2,100
1,900
1,750
1,550
1,500
1,400
1,300
1,150
1,050
975
930
880
830
810
790
740
660
600
540
490
420
400
380
365
335
310
290
270
250
230
220
200
MAX. REVERSE
CURRENT**
I
R
(max) @ V
R
μA
150
150
100
20
20
20
10
10
300
125
50
25
25
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
VOLTS
0.5
0.5
1.0
1.0
1.0
2.0
2.0
3.0
4.5
5.0
5.4
6.1
6.7
8.4
9.1
9.9
11.4
11.4
12.2
13.0
13.7
13.7
15.2
16.7
18.2
18.2
20.6
22.8
25.1
27.4
29.7
32.7
32.7
35.8
38.8
38.8
42.6
42.6
47.1
51.7
56.0
62.2
69.2
76.0
83.0
83.0
91.2
99.8
114.0
114.0
121.6
121.6
136.8
152.0
TYPICAL
TEMP.
COEFF.
α
VZ
%/
o
C
-0.046
-0.033
-0.015
+/-0.010
+0.030
+0.049
+0.053
+0.057
0.040
0.045
0.048
0.050
0.055
0.060
0.065
0.065
0.070
0.070
0.070
0.075
0.075
0.075
0.075
0.080
0.080
0.080
0.085
0.085
0.085
0.085
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.090
0.095
0.095
0.095
0.095
0.095
0.095
0.095
0.095
0.095
0.100
JEDEC
TYPE NO.
(Note 1)
†1N4549B
†1N4550B
†1N4551B
†1N4552B
†1N4553B
†1N4554B
1N4555B
1N4556B
†1N3305B
†1N3306B
†1N3307B
†1N3308B
†1N3309B
†1N3310B
†1N3311B
†1N3312B
1N3313B
†1N3314B
†1N3315B
1N3316B
†1N3317B
1N3318B
†1N3319B
†1N3320B
†1N3321B
1N3322B
†1N3323B
†1N3324B
†1N3325B
†1N3326B
†1N3327B
†1N3328B
1N3329B
†1N3330B
1N3331B
†1N3332B
1N3333B
†1N3334B
†1N3335B
†1N3336B
†1N3337B
†1N3338B
†1N3339B
†1N3340B
1N3341B
†1N3342B
†1N3343B
†1N3344B
1N3345B
†1N3346B
†1N3347B
1N3348B
†1N3349B
†1N3350B
T4-LDS-0077 Rev. 2 (101152)
Page 3 of 6
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841
1-800-446-1158 / (978) 620-2600 / Fax: (978) 689-0803
Website: http: //www.microsemi.com
Gort Road Business Park, Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
* JEDEC Registered Data.
** Not JEDEC Data.
† Have JAN and JANTX and TXV Qualifications to MIL-S-19500/358.
See further notes on following page.
NOTES:
1. The JEDEC type numbers shown (B suffix) have a +/- 5% tolerance on nominal zener voltage. If other
tolerance is required consult factory. The suffix A is used to identify +/-10% tolerance; no suffix or just R
indicates +/-20% tolerance: C suffix indicates +/-2% tolerance; and D suffix indicates +/-1%. Example:
1N3319RB is a REVERSED polarity, 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.
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.
T4-LDS-0077 Rev. 2 (101152)
Page 4 of 6
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841
1-800-446-1158 / (978) 620-2600 / Fax: (978) 689-0803
Website: http: //www.microsemi.com
Gort Road Business Park, Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
GRAPHS
Rated Power Dissipation - Watts
Stud Temperature C
o
FIGURE 1
Power Derating Curve
FIGURE 2
Typical Zener Impedance vs. Zener Current
T4-LDS-0077 Rev. 2 (101152)
Page 5 of 6
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