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
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/114
T4-LDS-0076 Rev. 2 (101151) Page 1 of 6
DEVICES LEVELS
1N2804B thru 1N2846B & RB JAN
and JANTX
1N4557B thru 1N4564B & RB JANTXV
B = Standard Polarity: RB = Reverse Polarity
DESCRIPTION
TO-3 (DO-204AD)
These high power 50W Zener diodes represented by the JEDEC registered 1N2804B
thru 1N2846B and 1N4557B thru 1N4564B series provide voltage regulation in a
selection over a 3.9V to 200V broad range of voltages. They may be operated up to
50W 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.
FEATURES
¾ JEDEC registered 1N2804 thru 1N2846B and 1N4557 thru 1N4564B
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-
19500/114 by adding the JAN, JANTX, or JANTXV prefixes to part numbers
for desired level of screening; (e.g. JANTX1N2804B, etc.
¾ Standard polarity is anode to case
¾ Reverse polarity with cathode to case by designating R suffix in part number,
e.g. 1N28 factory for surface mount equivalents 04RB, etc
¾ Consult factory for surface mount equivalents
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
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/114
T4-LDS-0076 Rev. 2 (101151) 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 Temperatures: -65°C to +175°C
¾ Storage Temperatures: -65°C to +200°C
¾ DC Power Dissipation: 50 watts at TC < 75°C
¾ Power Derating: 0.5W/°C above 75°C
¾ Forward Voltage @ 10A: 1.5 Volts
¾ THERMAL RESISTANCE: 2.0°C/W maximum junction to base (1.5°C/W typical)
¾ Solder temperatures: 260°C for 10 s (max)
MECHANICAL AND PACKAGING
¾ CASE: Industry Standard TO-3 (TO-204AD), hermetically sealed, 0.052 inch diameter pins.
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 either example, both pins are common with one another as anode or cathode (see
circuit on last page).
¾ WEIGHT: 15 grams.
¾ MOUNTING HARDWARE: Consult factory for optional insulator and sheet metal screws
¾ See package dimensions on last page
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
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/114
T4-LDS-0076 Rev. 2 (101151) Page 3 of 6
ELECTRICAL CHARACTERISTICS @ 30°C Case Temperature
JEDEC
TYPE NO.
(Note 1)
NOMINAL
ZENER
VOLTAGE
VZ @ IZT
(Note 2)
Volts
ZENER
TEST
CURRENT
(IZT)
mA
MAX. DYNAMIC
IMPEDANCE
(Note 3)
MAX. DC ZENER
CURRENT
(IZM) @ 75oC
Stud Temp.
(Note 4)
mA
TYPICAL
TEMP.
COEFF.
αVZ
%/oC
MAX**
REVERSE
CURRENT
I
R
@ V
R
POLARITY
ZZT @ IZT
OHMS
ZZK @
1mA (IZK)
OHMS μA Volts
†1N4557B
†1N4558B
†1N4559B
†1N4560B
†1N4561B
†1N4562B
1N4563B
1N4564B
3.9
4.3
4.7
5.1
5.6
6.2
6.8
7.5
3200
2900
2650
2450
2250
2000
1850
1650
0.16
0.16
0.12
0.12
0.12
0.14
0.16
0.24
400
500
600
650
900
1000
200
100
11,900
10,650
9,700
8,900
8,100
7,300
6,650
6,050
-0.046
-0.033
-0.015
+/-0.010
+0.03
+0.049
+0.053
+0.057
150
150
100
20
20
20
10
10
0.5
0.5
1
1
1
2
2
3
†1N2804B
†1N2805B
†1N2806B
†1N2807B
†1N2808B
†1N2809B
6.8
7.5
8.2
9.1
10
11
1850
1700
1500
1370
1200
1100
0.2
0.3
0.4
0.5
0.6
0.8
70
70
70
70
80
80
7,400
6,600
5,800
5,300
4,800
4,300
.040
.045
.048
.050
.055
.060
150
100
50
25
25
10
4.5
5
5.4
6.1
6.7
8.4
†1N2810B
†1N2811B
1N2812B
†1N2813B
†1N2814B
1N2815B
12
13
14
15
16
17
1000
960
890
830
780
740
1.0
1.1
1.2
1.4
1.6
1.8
80
80
80
80
80
80
4,000
3,700
3,400
3,100
2,950
2,750
.065
.065
.070
.070
.070
.075
10
10
10
10
10
10
9.1
9.9
10.6
11.4
12.2
13.0
†1N2816B
1N2817B
†1N2818B
†1N2819B
†1N2820B
1N2821B
18
19
20
22
24
25
700
660
630
570
520
500
2.0
2.2
2.4
2.5
2.6
2.7
80
80
80
80
80
90
2,550
2,450
2,350
2,100
1,950
1,850
.075
.075
.075
.080
.080
.080
10
10
10
10
10
10
13.7
14.4
15.2
16.7
18.2
19
†1N2822B
†1N2823B
†1N2824B
†1N2825B
†1N2826B
†1N2827B
27
30
33
36
39
43
460
420
380
350
320
290
2.8
3.0
3.2
3.5
4.0
4.5
90
90
90
90
90
90
1,650
1,550
1,450
1,300
1,175
1,075
.085
.085
.085
.085
.090
.090
10
10
10
10
10
10
20.6
22.8
25.1
27.4
29.7
32.7
1N2828B
†1N2829B
1N2830B
†1N2831B
†1N2832B
†1N2833B
45
47
50
51
56
62
280
270
250
245
220
200
4.5
5.0
5.0
5.2
6
7
100
100
100
100
110
120
1,030
980
935
925
825
735
.090
.090
.090
.090
.090
.090
10
10
10
10
10
10
34.2
35.8
38
38.8
42.6
47.1
†1N2834B
†1N2835B
†1N2836B
†1N2837B
†1N2838B
1N2839B
68
75
82
91
100
105
180
170
150
140
120
120
8
9
11
15
20
25
140
150
160
180
200
210
670
600
550
470
450
430
.090
.090
.090
.090
.090
.095
10
10
10
10
10
10
51.7
56
62.2
69.2
76
79.8
†1N2840B
†1N2841B
†1N2842B
†1N2843B
†1N2844B
†1N2845B
†1N2846B
110
120
130
150
160
180
200
110
100
95
85
80
68
65
30
40
50
75
80
90
100
220
240
275
400
450
525
600
410
375
345
300
285
250
220
.095
.095
.095
.095
.095
.095
.100
10
10
10
10
10
10
10
83.6
91.2
98.8
114.0
121.6
136.8
152.0
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
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/114
T4-LDS-0076 Rev. 2 (101151) Page 4 of 6
* JEDEC Registered Data.
** Not JEDEC Data.
† Have JAN, JANTX and JANTXV Qualifications to MIL-S-19500/114.
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%.
2. Standard polarity units have the anode connected to the case. Reverse polarity (cathode-to-case) units are
available and are indicated by suffix R in the part number.
3. Zener Voltage (VZ) is measured with junction in thermal equilibrium with 30°C base temperature. The test
currents (IZT) have been selected so that at nominal voltages the dissipation is a constant 12.5 watts. This
results in a nominal junction temperature rise of 18.75°C.
4. 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 six representative types is shown in Figure 3.
Also see MicroNote 202 for further information.
5. The values of IZM are calculated for a +/-5% tolerance on nominal zener voltage. Allowance has been made
for the rise in zener voltage above VZT that results from zener impedance and the increase in junction
temperature as power dissipation approaches 50 watts. In the case of individual diodes, IZM is that value of
current that results in a dissipation of 50 watts.
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
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/114
T4-LDS-0076 Rev. 2 (101151) Page 5 of 6
GRAPHS
Case Temperature
oC
FIGURE 2
POWER DERATING CURVE
FIGURE GROUP 3
TYPICAL ZENER IMPEDANCE vs. ZENER CURRENT FOR TYPES SHOWN
Rated Power Dissipation - Watts
Typical circuit connections for anode-to-case and
cathode-to-case polarities (standard and reverse
polarities, respectively).
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
50 WATT ZENER DIODES
Qualified per MIL-PRF-19500/114
T4-LDS-0076 Rev. 2 (101151) Page 6 of 6
PACKAGE DIMENSIONS
NOTES:
1. Dimensions are in inches.
2. Milimeter equivalents are given for general information only.
3. These dimensions should be measured at points .050 inch (1.27mm) + .005 inch (0.13mm) -.000 inch (0.00mm) below
seating plane.
4. The seating plane of the header shall be flat within .001 (0.03mm) concave to .004 inch (0.10mm) convex .001 inch
(0.003mm) cocave to .006 inch (0.15mm) convex overall.
5. Pins 1 and 2 are internally connected with an internal jumper.
6. Devices wih B suffix have the anode internally connected to the case and devices with RB suffix (reverse polarity) have
the cathode internally connected to the case.
7. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.
FIGURE 1. Physical dimensions (similar to TO-3)
Dimensions
Ltr Inches Millimeters Notes
Min Max Min Max
CH .270 .380 6.86 9.65
LD .048 .053 0.97 1.35
CD .875 22.23
PS .420 .440 10.67 11.18 3
PS1 .205 .225 5.21 5.72 3
HT .060 .135 1.52 3.42
LL .312 .500 7.92 12.70
L1 .050 1.27
MHD .151 .165 3.84 4.09
MHS 1.177 1.197 29.90 30.40
HR .495 .525 12.57 13.34
HR1 .131 .188 3.33 4.78
S1 .655 .675 16.64 17.15
