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50 Watt Zener Diodes
S C O T T S D A L E D I V I S I O N
1N2804 thru 1N2846B and
1N4557 thru 1N4564B
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
1N2
804 - 4
6
B
&
1N4
557
B 6
4
B
DESCRIPTION
APPEARANCE
These high power 50 W Zener diodes represented by the JEDEC registered
1N2804 thru 1N2846B and 1N4557 thru 1N4564B 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.
TO-3
(TO-204AD)
IMPORTANT: For the most current data, consult MICROSEMI's website:
http://www.microsemi.com
FEATURES
APPLICATIONS / BENEFITS
JEDEC registered 1N2804 thru 1N2846B and
1N4557 thru 1N4564B
Internal solder bond construction
Hermetically sealed (welded)
Zener Voltage 3.9V to 200V.
Also available in JAN, JANTX, and JANTXV
qualifications per MIL-PRF-19500/114 by adding the
JAN, JANTX, or JANTXV prefixes to part numbers
for desired level of screening; (e.g.
JANTX1N2804B, etc.
Standard polarity is anode to case
Reverse polarity with cathode to case by designating
R suffix in part number, e.g. 1N2804RB, 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 Temperatures: -65
o
C to +175
o
C
Storage Temperatures: -65
o
C to +200
o
C
DC Power Dissipation: 50 watts at T
C
< 75
o
C
Power Derating: 0.5W/
o
C above 75
o
C
Forward Voltage @ 10 A: 1.5 Volts
THERMAL RESISTANCE: 2.0
o
C/W maximum
junction to base (1.5
o
C/W typical)
Solder temperatures: 260
o
C for 10 s (max)
CASE: Industry Standard TO-3 (TO-204AD),
hermetically sealed, 0.052 inch diameter pins.
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 and sheet metal screws
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
1N2804 thru 1N2846B and
1N4557 thru 1N4564B
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
1N2
804 - 4
6
B
&
1N4
557
B 6
4
B
*
ELECTRICAL CHARACTERISTICS @ 25
o
C
MAX. ZENER
IMPEDANCE
(Note 3)
MAXIMUM LEAKAGE
CURRENT**
I
R
@ V
R
JEDEC
TYPE NO.
(Note 1)
NOMINAL
ZENER
VOLTAGE
V
Z
@ I
ZT
(Note 2)
Volts
ZENER
TEST
CURRENT
(I
ZT
)
mA
Z
ZT
@ I
ZT
OHMS
Z
ZK
@
5mA
(I
ZK
)
OHMS
MAX. DC ZENER
CURRENT
(
I
ZM
@ 75
o
C
Case Temp.
(Note 4)
mA
TYPICAL
ZENER
VOLTAGE
Temp. Coeff.
VZ
%/
o
C
A
V
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
*JEDEC Registered Data. **Not JEDEC Data.
Have JAN, JANTX and JANTXV Qualifications to MIL-S-19500/114.
S
ee further notes on following page

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
S C O T T S D A L E D I V I S I O N
1N2804 thru 1N2846B and
1N4557 thru 1N4564B
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
1N2
804 - 4
6
B
&
1N4
557
B 6
4
B
NOTES:
1.
The JEDEC type numbers shown (B suffix) have a +/- 5% tolerance on nominal zener voltage. The suffix A is used to identify +/-10%
tolerance; no suffix indicates +/-20% tolerance. If tighter tolerance is required, consult factory. 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.
2.
Zener Voltage (V
Z
) is measured with junction in thermal equilibrium with 30
o
C base temperature. The test currents (I
ZT
) 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
o
C .
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 six representative types is
shown in Figure 3. Also see MicroNote 202 for further information.
4.
The values of I
ZM
are calculated for a +/-5% tolerance on nominal zener voltage. Allowance has been made for the rise in zener voltage
above V
ZT
that results from zener impedance and the increase in junction temperature as power dissipation approaches 50 watts. In the
case of individual diodes, I
ZM
is that value of current that results in a dissipation of 50 watts.
GRAPHS AND CIRCUITS
Typical circuit connections for anode-to-case and
cathode-to-case polarities (standard and reverse
polarities, respectively).
Rated Po
w
e
r Dissipation - W
a
tts
Case
Temperature
o
C
FIGURE 2
POWER DERATING CURVE

FIGURE GROUP 3
TYPICAL ZENER IMPEDANCE vs. ZENER CURRENT FOR TYPES SHOWN
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
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 4
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
1N2804 thru 1N2846B and
1N4557 thru 1N4564B
1N2
804 - 4
6
B
&
1N4
557
B 6
4
B
PACKAGE DIMENSIONS