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.
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3
REV.02 20120403
YEASHIN [ Yea Shin Technology Co., Ltd ]
