TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http: //www.microsemi.com
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/358
T4-LDS-0077 Rev. 2 (101152) Page 1 of 6
DEVICES LEVELS
1N3305B thru 1N3350B & RB JAN
and JANTX
1N4549B thru 1N4556B & RB JANTXV
B = Standard Polarity: RB = Reverse Polarity
DESCRIPTION
DO-5 (DO-203AB)
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
FEATURES
¾ JEDEC registered 1N3305B thru 1N3350B and 1N4549B thru 1N4556B
¾ Internal solder bond construction
¾ Hermetically sealed (welded)
¾ Zener Voltage 3.9V to 200V.
¾ 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.
¾ Standard polarity is anode to case
¾ Reverse polarity with cathode to case by designating R suffix in part number,
e.g. 1N3305RB, etc.
¾ Consult factory for surface mount equivalents
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http: //www.microsemi.com
T4-LDS-0077 Rev. 2 (101152) Page 2 of 6
APPLICATIONS / BENEFITS
¾ Regulates voltage over a broad operating current and temperature range
¾ Standard voltage tolerances are +/- 5% with B suffix
¾ Consult factory for +/-10% with an A suffix, +/-20% with no suffix, +/-2% with a C suffix and +/-1% with a D
suffix respectively
¾ Reverse polarity available
¾ Nonsensitive to ESD per MIL-STD-750 Method 1020
¾ Inherently radiation hard as described in Microsemi MicroNote 050
MAXIMUM RATINGS
¾ Junction & Storage Temperatures: -65°C to +175°C
¾ DC Power Dissipation: 50 watts at TC < 75°C
¾ Power Derating: 0.5 W/°C above 75°C
¾ Forward Voltage @ 10A: 1.5 Volts
¾ THERMAL RESISTANCE: 2.0°C/W maximum junction to hexagonal base (1.5°C/W typical)
¾ Solder temperatures: 260°C for 10s (max)
MECHANICAL AND PACKAGING
¾ CASE: Industry Standard DO-5 (DO-203AB), 11/16 inch hexagonal stud with 1/4-28 threads welded
hermetically sealed metal and glass
¾ FINISH: All external surfaces are corrosion resistant and terminal solderable.
¾ POLARITY: Standard Polarity units are connected anode to case. Reverse polarity (cathode to case) is
indicated by Suffix R in part number
¾ WEIGHT: 15 grams
¾ MOUNTING HARDWARE: Consult factory for optional insu lator, bushing, solder terminal, washers and nut
¾ See package dimensions on last page
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http: //www.microsemi.com
T4-LDS-0077 Rev. 2 (101152) Page 3 of 6
ELECTRICAL CHARACTERISTICS @ 30oC Case Temperature
JEDEC
TYPE NO.
(Note 1)
NOMINAL
ZENER
VOLTAGE
VZ @ IZT
Volts
(Note 2) †
ZENER
TEST
CURRENT
(IZT) mA †
MAX. DYNAMIC
IMPEDANCE (Note 3) † MAX. DC
ZENER
CURRENT
(IZM)
mA
MAX. REVERSE
CURRENT**
I
R
(max) @ VR
TYPICAL
TEMP.
COEFF.
αVZ
%/oC
ZZT @
IZT
OHMS ZZK @ IZK = 5 mA
OHMS μA VOLTS
†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
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http: //www.microsemi.com
T4-LDS-0077 Rev. 2 (101152) Page 4 of 6
* 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 (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.
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http: //www.microsemi.com
T4-LDS-0077 Rev. 2 (101152) Page 5 of 6
GRAPHS
Stud Temperature oC
FIGURE 1
Power Derating Cu rve
FIGURE 2
Typical Zener Impedance vs. Zener Current
Rated Power Dissipation - Watts
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http: //www.microsemi.com
T4-LDS-0077 Rev. 2 (101152) Page 6 of 6
PACKAGE DIMENSIONS
NOTES: Dimensions
1. Dimensions are in inches. Ltr Inches Millimeters Notes
2. Maximum pitch diameter of plated threads shall be basic pitch diameter; Min Max Min Max
(.2268). .250-28 UNF-2B UNF-2A THD NF optional. b --- .375 --- 9.53
3. Complete threads to extend to within 1-1/2 threads of seating plane. C --- .080 --- 2.03
4. Angular orientation of this terminal is undefined. CD --- .667 --- 16.94
5. Metric equivalents are given for general information only. CH --- .450 --- 11.43
6. Diameter of unthreaded portion shall be .249 maximum and .220 HF .667 .687 16.94 17.45
minimum HT .060 --- 1.52 ---
OAH --- 1.000 --- 25.40
SL .422 .453 10.72 11.51 2, 3, 6
UD .220 .249
φT --- .175 --- 4.45
FIGURE 1. Physical dimensions.
