©2004 Fairchild Semiconductor Corporation 1N5221B - 1N5279B, Rev. H1
Zeners 1N5221B - 1N5279B
Electrical Characteristics
T
A
=25°C unless otherwi se note d
Device V
Z
(V) @ I
Z
(Note 1)
Z
Z
(Ω) @ I
Z
(mA) Z
ZK
(Ω) @ I
ZK
(mA)
I
R
(µA) @ V
R
(V)
T
C
(%/°C)
Min. Typ. Max.
1N5221B
1N5222B
1N5223B
1N5224B
1N5225B
2.28
2.375
2.565
2.66
2.85
2.4
2.5
2.7
2.8
3
2.52
2.625
2.835
2.94
3.15
30
30
30
30
29
20
20
20
20
20
1,200
1,250
1,300
1,400
1,600
0.25
0.25
0.25
0.25
0.25
100
100
75
75
50
1.0
1.0
1.0
1.0
1.0
-0.085
-0.085
-0.080
-0.080
-0.075
1N5226B
1N5227B
1N5228B
1N5229B
1N5230B
3.135
3.42
3.705
4.085
4.465
3.3
3.6
3.9
4.3
4.7
3.465
3.78
4.095
4.515
4.935
28
24
23
22
19
20
20
20
20
20
1,600
1,700
1,900
2,000
1,900
0.25
0.25
0.25
0.25
0.25
25
15
10
5.0
2.0
1.0
1.0
1.0
1.0
1.0
-0.07
-0.065
-0.06
+/-0.055
+/-0.03
1N5231B
1N5232B
1N5233B
1N5234B
1N5235B
4.845
5.32
5.7
5.89
6.46
5.1
5.6
6
6.2
6.8
5.355
5.88
6.3
6.51
7.14
17
11
7.0
7.0
5.0
20
20
20
20
20
1,600
1,600
1,600
1,000
750
0.25
0.25
0.25
0.25
0.25
5.0
5.0
5.0
5.0
3.0
2.0
3.0
3.5
4.0
5.0
+/-0.03
0.038
0.038
0.045
0.05
1N5236B
1N5237B
1N5238B
1N5239B
1N5240B
7.125
7.79
8.265
8.645
9.5
7.5
8.2
8.7
9.1
10
7.875
8.61
9.135
9.555
10.5
6.0
8.0
8.0
10
17
20
20
20
20
20
500
500
600
600
600
0.25
0.25
0.25
0.25
0.25
3.0
3.0
3.0
3.0
3.0
6.0
6.5
6.5
7.0
8.0
0.058
0.062
0.065
0.068
0.075
1N5241B
1N5242B
1N5243B
1N5244B
1N5245B
10.45
11.4
12.35
13.3
14.25
11
12
13
14
15
11.55
12.6
13.65
14.7
15.75
22
30
13
15
16
20
20
9.5
9.0
8.5
600
600
600
600
600
0.25
0.25
0.25
0.25
0.25
2.0
0.1
0.1
0.1
0.1
8.4
9.1
9.9
10
11
0.076
0.077
0.079
0.080
0.082
1N5246B
1N5247B
1N5248B
1N5247B
1N5250B
15.2
16.15
17.1
18.05
19
16
17
18
19
20
16.8
17.85
18.9
19.95
21
17
19
21
23
25
7.8
7.4
7.0
6.6
6.2
600
600
600
600
600
0.25
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
0.1
12
13
14
14
15
0.083
0.084
0.085
0.085
0.086
Zeners
1N5221B - 1N5279B
Absolute Maximum Ratings *
T
A
= 25°C unless otherwise noted
* These ratings are limiting values above which the serviceability of the diode may be impaired.
** Non-recurrent square wave PW = 8.3ms, Ta = 50 degrees C.
Symbol Parameter Value Units
P
D
Power Dissipation
Derate above 50°C500
4.0 mW
mW°C
T
STG
Storage Temperature Range -65 to +200 °C
T
J
Maximum Junction Operating Temperature +200 °C
Lead Temperature (1/16” from case for 10
seconds) +230 °C
Tolerance = 5%
DO-35 Glass case
COLOR BAND DENOTES CATHODE
©2004 Fairchild Semiconductor Corporation 1N5221B - 1N5279B, Rev. H1
Zeners 1N5221B - 1N5279B
Electrical Characteristics
(Continued) T
A
=25°C unless otherwise noted
Notes:
1. Zener Voltage (V
Z
)
The zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (T
L
) at 30°C ± 1°C and 3/8” lead length.
Device V
Z
(V) @ I
Z
(Note 1)
Z
Z
(Ω) @ I
Z
(mA) Z
ZK
(Ω) @ I
ZK
(mA)
I
R
(µA) @ V
R
(V)
T
C
(%/°C)
Min. Typ. Max.
1N5251B
1N5252B
1N5253B
1N5254B
1N5255B
20.9
22.8
23.75
25.65
26.6
22
24
25
27
28
23.1
25.2
26.25
28.35
29.4
29
33
35
41
44
5.6
5.2
5.0
4.6
4.5
600
600
600
600
600
0.25
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
0.1
17
18
19
21
21
0.087
0.088
0.088
0.089
0.090
1N5256B
1N5257B
1N5258B
1N5259B
1N5260B
28.5
31.35
34.2
37.05
40.85
30
33
36
39
43
31.5
34.65
37.8
40.95
45.15
49
58
70
80
93
4.2
3.8
3.4
3.2
3.0
600
700
700
800
900
0.25
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
0.1
23
25
27
30
33
0.09
0.092
0.093
0.094
0.095
1N5261B
1N5262B
1N5263B
1N5264B
1N5265B
44.65
48.45
53.2
57
58.9
47
51
56
60
62
49.35
53.55
58.8
63
65.1
105
125
150
170
185
2.7
2.5
2.2
2.1
2.0
1000
1100
1300
1400
1400
0.25
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
0.1
36
39
43
46
47
0.095
0.096
0.096
0.097
0.097
1N5266B
1N5267B
1N5268B
1N5269B
1N5270B
64.6
71.25
80.75
82.65
96.45
68
75
85
87
91
71.4
78.75
89.25
91.35
95.55
230
270
330
370
400
1.8
1.7
1.5
1.4
1.4
1600
1700
2000
2200
2300
0.25
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
0.1
52
56
62
68
69
0.097
0.098
0.098
0.099
0.099
1N5271B
1N5272B
1N5273B
1N5274B
1N5275B
95
104.5
114
123.5
133
100
110
120
130
140
105
115.5
126
136.5
147
500
750
900
1100
1300
1.3
1.1
1.0
0.95
0.90
2600
3000
4000
4500
4500
0.25
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
0.1
76
84
91
99
106
0.099
0.11
0.11
0.11
0.11
1N5276B
1N5277B
1N5278B
1N5279B
142.5
152
161.5
171
150
160
170
180
157.5
168
178.5
189
1500
1700
1900
2200
0.85
0.80
0.74
0.68
5000
5500
5500
6000
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
114
122
129
137
0.11
0.11
0.11
0.11
V
F
Forward Voltage = 1.2V Max. @ I
F
= 200mA
©2004 Fairchild Semiconductor Corporation 1N5221B - 1N5279B, Rev. H1
Zeners 1N5221B - 1N5279B
Top Mark Information
Device Line 1 Line 2 Line 3 Line 4
1N5221B
1N5222B
1N5223B
1N5224B
1N5225B
LOGO
LOGO
LOGO
LOGO
LOGO
522
522
522
522
522
1B
2B
3B
4B
5B
XY
XY
XY
XY
XY
1N5226B
1N5227B
1N5228B
1N5229B
1N5230B
LOGO
LOGO
LOGO
LOGO
LOGO
522
522
522
522
523
6B
7B
8B
9B
0B
XY
XY
XY
XY
XY
1N5231B
1N5232B
1N5233B
1N5234B
1N5235B
LOGO
LOGO
LOGO
LOGO
LOGO
523
523
523
523
523
1B
2B
3B
4B
5B
XY
XY
XY
XY
XY
1N5236B
1N5237B
1N5238B
1N5239B
1N5240B
LOGO
LOGO
LOGO
LOGO
LOGO
523
523
523
523
524
6B
7B
8B
9B
0B
XY
XY
XY
XY
XY
1N5241B
1N5242B
1N5243B
1N5244B
1N5245B
LOGO
LOGO
LOGO
LOGO
LOGO
524
524
524
524
524
1B
2B
3B
4B
5B
XY
XY
XY
XY
XY
1N5246B
1N5247B
1N5248B
1N5247B
1N5250B
LOGO
LOGO
LOGO
LOGO
LOGO
524
524
524
524
525
6B
7B
8B
9B
0B
XY
XY
XY
XY
XY
1N5251B
1N5252B
1N5253B
1N5254B
1N5255B
LOGO
LOGO
LOGO
LOGO
LOGO
525
525
525
525
525
1B
2B
3B
4B
5B
XY
XY
XY
XY
XY
1N5256B
1N5257B
1N5258B
1N5259B
1N5260B
LOGO
LOGO
LOGO
LOGO
LOGO
525
525
525
525
526
6B
7B
8B
9B
0B
XY
XY
XY
XY
XY
1N5261B
1N5262B
1N5263B
1N5264B
1N5265B
LOGO
LOGO
LOGO
LOGO
LOGO
526
526
526
526
526
1B
2B
3B
4B
5B
XY
XY
XY
XY
XY
1N5266B
1N5267B
1N5268B
1N5269B
1N5270B
LOGO
LOGO
LOGO
LOGO
LOGO
526
526
526
526
526
6B
7B
8B
9B
0B
XY
XY
XY
XY
XY
1N5271B
1N5272B
1N5273B
1N5274B
1N5275B
LOGO
LOGO
LOGO
LOGO
LOGO
527
527
527
527
527
1B
2B
3B
4B
5B
XY
XY
XY
XY
XY
1N5276B
1N5277B
1N5278B
1N5279B
LOGO
LOGO
LOGO
LOGO
527
527
527
527
6B
7B
8B
9B
XY
XY
XY
XY
©2004 Fairchild Semiconductor Corporation 1N5221B - 1N5279B, Rev. H1
Zeners 1N5221B - 1N5279B
Top Mark Information
(Continued)
General Requirements:
1.0 Cathod Band
2.0 First Line: F - Fairchild Logo
3.0 Second Line: Device name - For 1Nxx series: 3
rd
to 5th characters of the device name.
For BZxx series: 4
th
to 6
th
characters of the device name.
4.0 Third Line: Device name - For 1Nxx series: 6
th
to 7
th
characters of the device name.
For BZXyy series: Voltage rating
5.0 Fourth Line: XY or XYL - Two Digit - Six Weeks Date Code
Where: X represents the last digit of the calendar year
Y represents the Six weeks numeric code
L represents the Large die identification
6.0 Devices shall be marked as required in the device specification (PID or FSC Test Spec).
7.0 Maximum no. of marking lines: 4
8.0 Maximum no. of digits per line: 3
9.0 FSC logo must be 20 % taller than the alphanumeric marking and should occupy the 2 characters of the specified line.
10.0 Marking Font: Arial (Except FSC Logo)
11.0 First character of each marking line must be aligned vertically
F
522
9B
XY
1
st
line: F - Fairchild Logo
2
nd
line: Device Name - 3
rd
to 5
th
characters of the device name.
or 4
th
to 6
th
characters for BZXyy series
3
rd
line: Device Name - 6
th
to 7
th
characters of the device name.
or Voltage rating for BZXyy series
4
th
line: Device Co de or - Two Digit - Six Weeks Date Code.
Date code plus or Two Digit - Six Weeks Date Code
Large die identification plus Large die identification, “L”
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY , FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY
ARISING OUT OF THE APPLICA TION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT
CONVEY ANY LICENSE UNDER ITS P ATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is
not intended to be an exhaustive list of all such trademarks.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROV AL OF FAIRCHILD SEMICONDUCTOR CORPORA TION.
As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, or (c) whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
reasonably expected to result in significant injury to the
user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
PRODUCT ST A TUS DEFINITIONS
Definition of Terms
Datasheet Identification Product Status Definition
Advance Information
Preliminary
No Identification Needed
Obsolete
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
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In Design
First Production
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