DATA SHEET
SEMICONDUCTOR
1N957B~1N992B
500 mW DO-35 Hermetically
Sealed Glass Zener Voltage
Regulators
Maximum Ratings
(Note 1)
Rating
Maximum Steady State Power Dissipation
@ T
L
≤75°C,
Lead Length = 3/8”
Derate Above 75°C
Operating and Storage
Temperature Range
Symbol
P
D
Value
500
Unit
mW
DEVICE MARKING DIAGRAM
9x
xT
Device Code : 1N9xxT
Tolerance (T) : A =
10%
:
B = 5%
:
C = 2%
:
D = 1%
4.0
T
J
, T
stg
-65 to +200
mW/°C
°C
AXIAL LEAD
DO35
1. Some part number series have lower JEDEC registered ratings.
Specification Features
•
•
•
•
•
Zener Voltage Range = 6.8 V to 200 V
ESD Rating of Class 3 (>16 KV) per Human Body Model
DO-35 Package (DO-204AH)
Double Slug Type Construction
Metallurgical Bonding
Cathode
Anode
Mechanical Characteristics
Case
:
Double slug type, hermetically sealed glass
Finish
:
All external surfaces are corrosion resistant and leads are readily solderable.
Polarity :
Cathode indicated by polarity band
Mounting:
Any
Maximum Lead Temperature for Soldering Purposes
230°C, 1/16” from the case for 10 seconds
MARKING DIAGRAM
1N
9x
xB
YMM
1N9xxB
Y
MM
= Device Code
= Year
= Month
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1
REV.02 20120403
1N957B~1N992B
ELECTRICAL CHARACTERISTICS
(T
A
= 25ºC unless
otherwise noted, V
F
= 1.5 V Max @ I
F
= 200mA for all types)
Symbol
V
Z
I
ZT
Z
ZT
I
ZM
I
R
V
R
I
F
V
F
I
ZM
Parameter
Reverse Zener Voltage @ I
ZT
Reverse Zener Current
Maximum Zener Impedance @ I
ZT
Maximum DC Zener Current
Reverse Leakage Current @ V
R
Reverse Voltage
Forward Current
Forward Voltage @ I
F
Maximum DC Zener Current
ELECTRICAL CHARACTERISTICS
(T
A
= 25ºC unless otherwise noted, V
F
= 1.5 V Max @ I
F
= 200mA for all types)
Zener Voltage
(Note 3.)
Device
(Note 2.)
Zener Impedance
(Note 4.)
@ I
ZT
Z
ZT
@ I
ZT
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
70
80
93
Z
ZK
@ I
ZK
Ω
(Ω)
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
(mA)
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
Leakage Current
I
R
@ V
R
µ
(µA)
150
75
50
25
10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
(Volts)
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
I
ZM
(Note 5.)
Device
Marking
1N957B
1N958B
1N959B
1N960B
1N961B
1N962B
1N963B
1N964B
1N965B
1N966B
1N967B
1N968B
1N969B
1N970B
1N971B
1N972B
1N973B
1N974B
1N975B
1N976B
V
Z
(Volts)
Min
6.46
7.125
7.79
8.645
9.5
10.45
11.4
12.35
14.25
15.2
17.1
19
20.9
22.8
25.65
28.5
31.35
34.2
37.05
40.85
Nom
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
Max
7.14
7.875
8.61
9.555
10.5
11.55
12.6
13.65
15.75
16.8
18.9
21
23.1
25.2
28.35
31.5
34.65
37.8
40.95
45.15
(mA)
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
(mA)
47
42
38
35
32
28
26
24
21
19
17
15
14
13
11
10
9.2
8.5
7.8
7
1N957B
1N958B
1N959B
1N960B
1N961B
1N962B
1N963B
1N964B
1N965B
1N966B
1N967B
1N968B
1N969B
1N970B
1N971B
1N972B
1N973B
1N974B
1N975B
1N976B
2. TOLERANCE AND TYPE NUMBER DESIGNATION (V
Z
)
The type numbers listed have a standard tolerance on the nominal zener voltage of
±5%.
3. 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.
4. 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 AC frequency = 60Hz.
5. MAXIMUM ZENER CURRENT RATINGS (I
ZM
)
Values shown are based on the JEDEC rating of 400mW where the actual zener voltage (V
Z
) is known at the operating
point, the zener current may be increased and is limited by the derating curve.
http://www.yeashin.com
2
REV.02 20120403
1N957B~1N992B
ELECTRICAL CHARACTERISTICS
(T
A
= 25ºC unless otherwise noted, V
F
= 1.5 V Max @ I
F
= 200mA for all types)
Zener Voltage
(Note 7.)
Device
(Note 6.)
Zener Impedance
(Note 8.)
@ I
ZT
Z
ZT
@ I
ZT
(Ω)
Ω
105
125
150
185
230
270
330
400
500
750
900
1100
1500
1700
2200
2500
Z
ZK
@ I
ZK
(Ω)
Ω
1500
1500
2000
2000
2000
2000
3000
3000
3000
4000
4500
5000
6000
6500
7100
8000
(mA)
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
Leakage Current
I
R
@ V
R
(µA)
µ
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
(Volts)
35.8
38.8
42.6
47.1
51.7
56
62.2
69.2
76
83.6
91.2
98.8
114
121.6
136.8
152
I
ZM
(Note 9.)
Device
Marking
1N977B
1N978B
1N979B
1N980B
1N981B
1N982B
1N983B
1N984B
1N985B
1N986B
1N987B
1N988B
1N989B
1N990B
1N991B
1N992B
V
Z
(Volts)
Min
44.65
48.45
53.2
58.9
64.6
71.25
77.9
86.45
95
104.5
114
123.5
142.5
152
171
190
Nom
47
51
56
62
68
75
82
91
100
110
120
130
150
160
180
200
Max
49.35
53.55
58.8
65.1
71.4
78.75
86.1
95.55
105
115.5
126
136.5
157.5
168
189
210
(mA)
2.7
2.5
2.2
2
1.8
1.7
1.5
1.4
1.3
1.1
1
0.95
0.85
0.8
0.68
0.65
(mA)
6.4
5.9
5.4
4.9
4.5
4.1
3.7
3.3
3
2.7
2.5
2.3
2
1.9
1.7
1.5
1N977B
1N978B
1N979B
1N980B
1N981B
1N982B
1N983B
1N984B
1N985B
1N986B
1N987B
1N988B
1N989B
1N990B
1N991B
1N992B
6. TOLERANCE AND TYPE NUMBER DESIGNATION (V
Z
)
The type numbers listed have a standard tolerance on the nominal zener voltage of
±5%.
7. 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.
8. 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 AC frequency = 60Hz.
9. MAXIMUM ZENER CURRENT RATINGS (I
ZM
)
Values shown are based on the JEDEC rating of 400mW where the actual zener voltage (V
Z
) is known at the operating
point, the zener current may be increased and is limited by the derating curve.
http://www.yeashin.com
3
REV.02 20120403
DEVICE CHARACTERISTICS
1N957B~1N992B
0.7
HEAT
SINKS
θ
JL, JUNCTION TO LEAD THERMAL RESISTANCE (
°
C/W)
500
0.6
P D , MAXIMUM STEADY STATE
POWER DISSIPATION (WATTS)
400
0.5
L
300
L
0.4
3/8"
3/8"
0.3
2.4-60 V
200
0.2
62-200 V
100
0.1
0
0
20
40
60
80
100
120
140
160
180
200
T L , LEAD TEMPERATURE (°C)
0
0
0.2
0.4
0.6
0.8
1
L , LEAD LENGTH TO HEAT SINK (INCH)
Figure 1. Steady State Power Derating
Figure 2. Typical Thermal Resistance
1000
7000
5000
2000
1000
700
500
200
100
70
50
I R , LEAKAGE CURRENT (
µ
A)
20
10
7
5
2
1
0.7
0.5
TYPICAL LEAKAGE CURRENT
AT 80% OF NOMINAL
BREAKDOWN VOLTAGE
+125°C
0.2
0.1
0.07
0.05
0.02
0.01
0.007
0.005
0.002
0.001
3
4
5
6
7
8
9
10
11
12
13
VZ , NOMINAL ZENER VOLTAGE (VOLTS)
14
15
+25°C
Figure 3. Typical Leakage Current
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4
REV.02 20120403
DEVICE CHARACTERISTICS
1N957B~1N992B
(-55
°C
to +150
°C
temperature range; 90% of the units are in the ranges indicated.)
TEMPERA TURE COEFFICIENT (mV/
°
C)
+12
TEMPERATURE COEFFICIENT (mV/
°
C)
+10
+8
+6
+4
+2
RANGE
0
-2
-4
2
3
4
5
6
7
8
9
10
11
12
V
Z
, ZENER VOLTAGE (VOLTS)
V
Z
@ I
ZT
(NOTE 2)
100
70
50
30
20
RANGE
V
Z
@ I
Z
(NOTE 2)
TEMPERATURE COEFFICIENTS
10
7
5
3
2
1
10
20
θ
VZ
,
θ
VZ
,
30
50
70
100
V
Z
, ZENER VOLTAGE (VOLTS)
Figure 4a. Range for Units to 12 Volts
Figure 4b. Range for Units 12 to 100 Volts
TEMPERA TURE COEFFICIENT (mV/
°
C)
TEMPERATURE COEFFICIENT (mV/
°
C)
200
+6
V
Z
@ I
Z
TA= 25
°C
180
+4
160
+2
20mA
0
0.01mA
1mA
-2
NOTE: BELOW 3 VOLTS AND ABOVE 8 VOL TS
NOTE:
CHANGES IN ZENER CURRENT DO NOT
NOTE:
AFFECT TEMPERATURE COEFFICIENTS
3
4
5
6
7
8
140
120
V
Z
@ I
ZT
(NOTE 2)
θ
VZ ,
θ
VZ
,
120
130
140
150
160
170
180
190
200
100
-4
V
Z
, ZENER VOLTAGE (VOLTS)
V
Z
, ZENER VOLTAGE (VOLTS)
Figure 4c. Range for Units 120 to 200 Volts
Figure 5. Effect of Zener Current
1000
500
0V BIAS
200
C, CAP ACIT ANCE (pF)
100
T
A
= 25
°
C
100
70
50
0 BIAS
C, CAP ACIT ANCE (pF)
30
20
1 VOLT BIAS
10
7
5
3
2
1
50% OF V BIAS
T= 25
°C
1V BIAS
50
20
10
5
2
1
1
2
5
10
20
50
100
V
Z,
ZENER VOLTAGE (VOLTS)
50% OF
V
Z
BIAS
120
140
160
180
190
200
220
V Z, ZENER VOLTAGE (VOLTS)
Figure 6a. Typical Capacitance 2.4-100 Volts
Figure 6b. Typical Capacitance 120-200 Volts
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REV.02 20120403
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