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1N957 THRU 1N978
ZENER DIODES
FEATURES
DO-35
♦
Silicon Planar Power Zener Diodes
♦
Standard Zener voltage tolerance is ±5% for
“B” suffix. Other tolerances are available upon
request.
max.
∅
.079 (2.0)
max. .150 (3.8)
min. 1.083 (27.5)
Cathode
Mark
min. 1.083 (27.5)
max.
∅
.020 (0.52)
MECHANICAL DATA
Case:
DO-35 Glass Case
Weight:
approx. 0.13 g
Dimensions are in inches and (millimeters)
MAXIMUM RATINGS
Ratings at 25°C ambient temperature unless otherwise specified.
SYMBOL
VALUE
UNIT
Zener Current (see Table “Characteristics”)
Power Dissipation at T
L
= 75°C
Junction Temperature
Storage Temperature Range
NOTES:
P
tot
T
j
T
S
500
(1)
175
– 65 to +175
mW
°C
°C
(1) T
L
is measured 3/8” from body.
SYMBOL
MIN.
TYP.
MAX.
UNIT
Thermal Resistance
Junction to Ambient Air
Forward Voltage
at I
F
= 200 mA
NOTES:
R
thJA
–
–
300
(1)
°C/W
V
F
–
–
1.5
Volts
(1) Valid provided that leads at a distance of 3/8” from case are kept at ambient temperature.
1/6/98
1N957 THRU 1N978
ELECTRICAL CHARACTERISTICS
Ratings at 25°C ambient temperature unless otherwise specified.
Type
Number
Nominal
Zener Voltage
V
Z
(3)
(Volts)
Test
Current
I
ZT
(mA)
Maximum Zener Impedance
(1)
Z
ZT
@ I
ZT
(Ω)
Z
ZK
@ I
ZK
(Ω)
I
ZK
(mA)
Maximum
Regulator Current
I
ZM
(2)
(mA)
Maximum Reverse Current
I
R
Maximum
(µA)
Test Voltage Vdc
(Volts)
1N957B
1N958B
1N959B
1N960B
1N961B
1N962B
1N963B
1N964B
1N965B
1N966B
1N967B
1N968B
1N969B
1N970B
1N971B
1N972B
1N973B
1N974B
1N975B
1N976B
1N977B
1N978B
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
18.5
16.5
15
14
12.5
11.5
10.5
9.5
8.5
7.8
7
6.2
5.6
5.2
4.6
4.2
3.8
3.4
3.2
3
2.7
2.5
4.5
5.5
6.5
7.5
8.5
9.5
11.5
13
16
17
21
25
29
33
41
49
58
70
80
93
105
125
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
1
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
0.25
0.25
0.25
0.25
0.25
47
42
38
35
32
28
26
24
21
19
17
15
14
13
11
10
9.2
8.5
7.8
7
6.4
5.9
150
75
50
25
10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
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
27.4
29.7
32.7
35.8
38.8
NOTES:
(1) The Zener Impedance is derived from the 1 KH
Z
AC voltage which results when an AC current having an RMS value equal to 10% of the Zener current (I
ZT
) is
superimposed on I
ZT
. Zener Impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units.
(2) Valid provided that leads at a distance of 3/8” from case are kept at ambient temperature.
(3) Measured with device junction in thermal equilibrium.
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