2004 Fairchild Semiconductor Corporation
1N957B - 1N991B, Rev. E2
Zener
s
1N
9
57B -
1N991
B
Electrical Characteristics
T
A
=25
C unless otherwise noted
Device
V
Z
(Volts)
(Note 1)
Z
Z
(
)
(Note 2)
I
R
@ V
R
I
ZM
(mA)
(Note 3)
Min.
Typ.
Max.
@ I
Z
(mA)
Z
Z
@ I
Z
Z
ZK
@ I
ZK
A
Volts
mA
1N957B
1N958B
1N959B
1N960B
1N961B
6.46
7.125
7.79
8.645
9.5
6.8
7.5
8.2
9.1
10
7.14
7.875
8.61
9.555
10.5
18.5
16.5
15
14
12.5
4.5
5.5
6.5
7.5
8.5
700
700
700
700
700
1.0
0.5
0.5
0.5
0.25
150
75
50
25
10
5.2
5.7
6.2
6.9
7.6
47
42
38
35
32
1N962B
1N963B
1N964B
1N965B
1N966B
10.45
11.4
12.35
14.25
15.2
11
12
13
15
16
11.55
12.6
13.65
15.75
16.8
11.5
10.5
9.5
8.5
7.8
9.5
11.5
13
16
17
700
700
700
700
700
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
8.4
9.1
9.9
11.4
12.2
28
26
24
21
19
1N967B
1N968B
1N969B
1N970B
1N971B
17.1
19
20.9
22.8
25.652
18
20
22
24
27
18.9
21
23.1
25.2
28.35
7.0
6.2
5.6
5.2
4.6
21
25
29
33
41
750
750
750
750
750
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
13.7
15.2
16.7
18.2
20.6
17
15
14
13
11
1N972B
1N973B
1N974B
1N975B
1N976B
8.5
31.35
34.2
37.05
40.85
30
33
36
39
43
31.5
34.65
37.8
40.95
45.15
4.2
3.8
3.4
3.2
3.0
49
58
70
80
93
1000
1000
1000
1000
1500
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
22.8
25.1
27.4
29.7
32.7
10
9.2
8.5
7.8
7.0
1N977B
1N978B
1N979B
1N980B
1N981B
44.65
48.45
53.2
58.9
64.6
47
51
56
62
68
49.35
53.55
58.8
65.1
71.4
2.7
2.5
2.2
2.0
1.8
105
125
150
185
230
1500
1500
2000
2000
2000
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
35.8
38.8
42.6
47.1
51.7
6.4
5.9
5.4
4.9
4.5
Zeners
1N957B - 1N991B
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.
Symbol
Parameter
Value
Units
P
D
Power Dissipation
@ TL
75
C, Lead Length = 3/8"
500
mW
Derate above 75
C
4.0
mW/
C
T
J
, T
STG
Operating and Storage Temperature Range
-65 to +200
C
Tolerance = 5%
DO-35 Glass case
COLOR BAND DENOTES CATHODE
2004 Fairchild Semiconductor Corporation
1N957B - 1N991B, Rev. E2
Zener
s
1N
9
57B -
1N991
B
Electrical Characteristics
(Continued)
T
A
=25
C unless otherwise noted
Notes:
1. Zener Voltage (V
Z
) Measurement
Nominal 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.
2. Zener Impedance (Z
Z
) Derivation
Z
ZT
and Z
ZK
are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for I
Z(ac)
= 0.1 I
Z(dc)
with the ac
frequency = 60Hz.
3. Maximum Zener Current Ratings (I
ZM
)
The maximum current handling capability on a worst case basis is limited by the actual zener voltage at the operation point and the power derating curve.
Device
V
Z
(Volts)
(Note 1)
Z
Z
(
)
(Note 2)
I
R
@ V
R
I
ZM
(mA)
(Note 3)
Min.
Typ.
Max.
@ I
Z
Z
Z
@ I
Z
Z
ZK
@ I
ZK
A
Volts
mA
1N982B
1N983B
1N984B
1N985B
1N986B
71.25
77.9
86.45
95
104.5
75
82
91
100
110
78.75
86.1
95.55
105
115.5
1.7
1.5
1.4
1.3
1.1
270
330
400
500
750
2000
3000
3000
3000
4000
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
56.0
62.2
69.2
76.0
83.6
4.1
3.7
3.3
3.0
2.7
1N987B
1N988B
1N989B
1N990B
1N991B
114
123.5
142.5
152
171
120
130
150
160
180
126
136.5
157.5
168
189
1.0
0.95
0.85
0.80
0.68
900
1100
1500
1700
2200
4500
5000
6000
6500
7100
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
91.2
98.8
114
121.6
136.8
2.5
2.3
2.0
1.9
1.7
2004 Fairchild Semiconductor Corporation
1N957B - 1N991B, Rev. E2
Zener
s
1N
9
57B -
1N991
B
Top Mark Information
Device
Line 1
Line 2
Line 3
Line 4
1N957B
1N958B
1N959B
1N960B
1N961B
LOGO
LOGO
LOGO
LOGO
LOGO
957
958
959
960
961
B
B
B
B
B
XY
XY
XY
XY
XY
1N962B
1N963B
1N964B
1N965B
1N966B
LOGO
LOGO
LOGO
LOGO
LOGO
962
963
964
965
966
B
B
B
B
B
XY
XY
XY
XY
XY
1N967B
1N968B
1N969B
1N970B
1N971B
LOGO
LOGO
LOGO
LOGO
LOGO
967
968
969
970
971
B
B
B
B
B
XY
XY
XY
XY
XY
1N972B
1N973B
1N974B
1N975B
1N976B
LOGO
LOGO
LOGO
LOGO
LOGO
972
973
974
975
976
B
B
B
B
B
XY
XY
XY
XY
XY
1N977B
1N978B
1N979B
1N980B
1N981B
LOGO
LOGO
LOGO
LOGO
LOGO
977
978
979
980
981
B
B
B
B
B
XY
XY
XY
XY
XY
1N982B
1N983B
1N984B
1N985B
1N986B
LOGO
LOGO
LOGO
LOGO
LOGO
982
983
984
985
986
B
B
B
B
B
XY
XY
XY
XY
XY
1N987B
1N988B
1N989B
1N990B
1N991B
LOGO
LOGO
LOGO
LOGO
LOGO
987
988
989
990
991
B
B
B
B
B
XY
XY
XY
XY
XY
2004 Fairchild Semiconductor Corporation
1N957B - 1N991B, Rev. E2
Zener
s
1N
9
57B -
1N991
B
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 Code 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 APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT
CONVEY ANY LICENSE UNDER ITS PATENT 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 APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
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 STATUS 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.
Formative or
In Design
First Production
Full Production
Not In Production
ImpliedDisconnectTM
ISOPLANARTM
LittleFETTM
MICROCOUPLERTM
MicroFETTM
MicroPakTM
MICROWIRETM
MSXTM
MSXProTM
OCXTM
OCXProTM
OPTOLOGIC
OPTOPLANARTM
FACT Quiet SeriesTM
FAST
FASTrTM
FPSTM
FRFETTM
GlobalOptoisolatorTM
GTOTM
HiSeCTM
I
2
CTM
i-LoTM
Rev. I10
ACExTM
ActiveArrayTM
BottomlessTM
CoolFETTM
CROSSVOLTTM
DOMETM
EcoSPARKTM
E
2
CMOSTM
EnSignaTM
FACTTM
PACMANTM
POPTM
Power247TM
PowerSaverTM
PowerTrench
QFET
QSTM
QT OptoelectronicsTM
Quiet SeriesTM
RapidConfigureTM
RapidConnectTM
SILENT SWITCHER
SMART STARTTM
SPMTM
StealthTM
SuperFETTM
SuperSOTTM-3
SuperSOTTM-6
SuperSOTTM-8
SyncFETTM
TinyLogic
TINYOPTOTM
TruTranslationTM
UHCTM
UltraFET
VCXTM
Across the board. Around the world.TM
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