1N957B - 1N973B Series
1N957B - 1N973B Series Half Watt Zeners
Absolute Maximum Ratings*
Symbol
T
STG
T
J
TA = 25°C unless otherwise noted
Tolerance: B = 5%
Parameter
Storage Temperature Range
Maximum Junction Operating Temperature
Lead Temperature (1/16” from case for 10
seconds)
Total Device Dissipation
Derate above 25°C
Value
-65 to
+200
+ 175
+ 230
500
3.33
Units
°C
°C
°C
mW
mW/°C
P
D
*
These ratings are limiting values above which the serviceability of the diode may be impaired.
NOTES:
1)
These ratings are based on a maximum junction temperature of 200 degrees C.
2)
These are steady state limits. The factory should be consulted on applications involving pulsed
or low duty cycle operations.
DO-35
COLOR BAND DENOTES CATHODE
Electrical Characteristics
Device
1N957B
1N958B
1N959B
1N960B
1N961B
1N962B
1N963B
1N964B
1N965B
1N966B
1N967B
1N968B
1N969B
1N970B
1N971B
1N972B
1N973B
TA = 25°C unless otherwise noted
V
Z
(V)
(Ω)
Ω
4.5
5.5
6.5
7.5
8.5
9.5
11.5
13
16
17
21
25
29
33
41
49
58
Z
Z
@
(mA)
18.5
16.5
15
14
12.5
11.5
10.5
9.5
8.5
7.8
7.0
6.2
5.6
5.2
4.6
4.2
3.8
I
ZT
Z
ZK
@
(Ω)
Ω
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1,000
1,000
(mA)
1.0
0.5
0.5
0.5
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
I
ZK
(µA)
µ
150
75
50
25
10
5
5
5
5
5
5
5
5
5
5
5
5
I
R
@
V
R
(V)
(%/°C)
°
0.05
0.058
0.062
0.068
0.072
0.073
0.076
0.079
0.082
0.083
0.085
0.086
0.087
0.088
0.090
0.091
0.092
T
C
I
ZRM
*
(mA)
47
42
38
35
32
28
26
24
21
19
17
15
14
13
11
10
9.2
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
5.2
5.7
6.2
6.9
7.6
8.4
9.1
9.9
11.4
12.2
13.7
15.2
16.7
18.2
20.6
22.8
25.1
*
IZRM (Maximum Zener Current Rating) Values shown are based on the JEDEC rating of 400 milliwatts. Where the actual zener voltage (VZ) is known at the
operating point, the maximum zener current may be increased and is limited by the derating curve.
2001
Fairchild Semiconductor Corporation
1N957B-1N973B Rev. A1
1N957B - 1N973B Series
Typical Characteristics
Zener Current vs. Zener Voltage
35
V
Z
- ZENER VOLTAGE (V)
Zener Current vs. Zener Impedence
5000
2000
1000
500
V
Z
= 3.3V
200
100
50
20
10
V
Z
= 12.0V
5
2
1
0.1
V
Z
= 5.1V
T
A
= 25
º
C
25
20
15
10
5
1
V
Z
= 5.1V
V
Z
= 3.3V
T
A
= 25
º
C
Z
Z
- IMPEDANCE (ohms)
30
V
Z
= 33.0V
V
Z
= 33.0V
V
Z
= 12.0V
2
5
10
I
Z
- ZENER CURRENT (mA)
20
30
0.2
0.5
1
2
5
I
Z
- ZENER CURRENT (mA)
10
20
3.3 Zener Voltage vs. Temperature
5
V
Z
- ZENER VOLTAGE (V)
V
Z
= 3.3V
5.1 Zener Voltage vs. Temperature
6
V
Z
- ZENER VOLTAGE (V)
V
Z
= 5.1V
4
T
A
= -25
º
C
T
A
= 25
º
C
5.5
T
A
= 125
º
C
3
T
A
= 85
º
C
5
T
A
= 100
º
C
T
A
= 25
º
C
T
A
= -25
º
C
T
A
= 85
º
C
2
T
A
= 100
º
C
T
A
= 125
º
C
4.5
1
4
1
2
5
10
I
Z
- ZENER CURRENT (mA)
20
30
1
2
5
10
I
Z
- ZENER CURRENT (mA)
20
30
12 Zener Voltage vs. Zener Temperature
15
V
Z
- ZENER VOLTAGE (V)
V
Z
= 12.0V
T
A
= 125
º
C
33 Zener Voltage vs. Zener Temperature
40
V
Z
- ZENER VOLTAGE (V)
V
Z
= 33.0V
T
A
= 100
º
C
T
A
= 125
º
C
35
10
T = -25
º
C
A
T
A
= 25
º
C
T
A
= 85
º
C
T
A
= 100
º
C
30
T
A
= -25
º
C
T
A
= 25
º
C
T
A
= 85
º
C
5
25
0
1
2
5
10
I
Z
- ZENER CURRENT (mA)
20
30
20
1
2
5
10
I
Z
- ZENER CURRENT (mA)
20
30
1N957B-1N973B Rev. A1
DO-35 Tape and Reel Data
DO-35 Packaging
Configuration:
Figure 1.0
Soabar Label
Corrugated Outer Liner
White (Anode)
Red/Blue (Cathode)
T50R
TNR Options
Kraft Paper Wound
Between Layers
DO-35 Packaging
Information Table:
Figure 2.0
DO-35 Packaging Information
Packaging Option
Packaging type
Qty per Reel/Tube/Bag
Reel Size (inch diameter)
Inside Tape Spacing (mm)
Int Box Dimension (mm)
Max qty per Box
Weight per unit (gm)
Weight per Reel/Ammo (kg)
T50R
TNR
10,000
13
52
30,000
0.137
2.23
T50A
Ammo
5,000
-
52
50,000
0.137
0.800
Standard
(no flow code)
Bag
500
-
-
Soabar Label sample
P.O. No.
TYPE
REV
PKG
QTY
Q.C.
10,000
IN5225A
A2
MARK
PART No.
EC No.
M.O. No.
DATE
OX5046F035
D9903
BLK-BRN
254x79x794 406x267x184 279x133x108
5,000
0.137
-
Bulk
MFD. UNDER US PAT 3.025.589 & OTHER US PATS & APPLICATIONS
Note/Comments
DO-35 Reel Dimensions:
Figure 3.0
Soabar Label
REEL DIMENSIONS
ITEM DESCRIPTION
D1
Reel Diameter
Arbor Hole Diameter (Standard)
D2
Core Diameter
Flange to Flange Inner Width
D1
D2
D3
W1
10.375
1.245
3.190
10.625
1.255
3.310
3.400
SYMBOL
MINIMUM
MAXIMUM
Note: All Dimensions are in inches
W1
D3
©2000 Fairchild Semiconductor International
September 1999, Rev. A
DO-35 Tape and Ammo Data, continued
DO-35 Ammo Packing
Configuration:
Figure 4.0
Soabar Label
(on top of box)
254mm x 79mm x 79mm
Intermediate Container (5,000 cap)
T50A Option
DO-35 Taping
Dimension:
Figure 5.0
G
H
TAPING DIMENSIONS
INCH
A
2.520
+0.066/
-0.027
2.047±0.027
0.200
±0.0157
0.047(max)
0.022(max)
0.027(max)
0.126(min)
0
±0.027
MM
64.00
+1.69/
-0.69
52
±0.69
5.08
±0.40
1.2(max)
0.55(max)
±0.69
3.2(min)
0
±0.69
MILS
2519
+66.5/
-27.0
2047±27
200
±15.7
47(max)
22(max)
±27
126(min)
0
±27
NOTES
Overall width
L1
F
B
A
B
C
D
E
Inside Tape Spacing
Component Pitch
Component Misalignment
Tape Mismatch
Units in line w/ one another
Lead amount between tapes
Lead amount beyond tapes
Delta between two leads
L2
F
G
H
E
C
D
L1-L2
DO-35 Bulk Packing
Configuration:
Figure 6.0
102mm x 76mm x 127mm
Immediate Box (1,000 cap)
133mm x 95mm
Anti-static bag (500/bag)
September 1999, Rev. A
DO-35 Package Dimensions
DO-35 (FS PKG Code D2)
1:1
Scale 1:1 on letter size paper
Dimensions shown below are in millimeters
Part Weight per unit (gram): 0.137
©2000 Fairchild Semiconductor International
March 2000, Rev. A
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