1N957B データシートの表示（PDF） - Digitron Semiconductors
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1N957B Datasheet PDF : 3 Pages
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DIGITRON SEMICONDUCTORS
1N957B-1N992B
500mW SILICON ZENER DIODES
Part
number
(1)
Nominal
zener
voltage
(2)
VZ
Volts
Zener
test
current
Maximum zener
impedance(3)
IZT
mA
ZZT @
IZT
Ohms
ZZK
Ohms
@IZK
mA
Maximum
DC zener
current
(4)
Maximum
surge
current
(5)
IZM
mA
IZSM
mA
Maximum reverse
leakage current
IR
@VR
µA
Volts
Maximum
temperature
coefficient
αvz
%/°C
1N984B
91
1.4
400 3000 0.25
4.1
21
5
69.2
0.099
1N985B
100
1.3
500 3000 0.25
3.7
18
5
76.0
0.110
1N986B
110
1.1
750 4000 0.25
3.3
16
5
83.6
0.110
1N987B
120
1.0
900 4500 0.25
3.1
15
5
91.2
0.110
1N988B
130
0.95
1100 5000 0.25
2.7
13
5
98.8
0.110
1N989B
150
0.85
1500 6000 0.25
2.4
12
5
114.0
0.110
1N990B
160
0.80
1700 6500 0.25
2.2
11
5
121.6
0.110
1N991B
180
0.68
2200 7100 0.25
2.0
10
5
136.8
0.110
1N992B
200
0.65
2500 8000 0.25
1.8
9
5
152.0
0.110
NOTE 1. Zener voltage tolerance on ‘’B’’ suffix is + 5%. Suffix letter A denotes +10%. No suffix denotes +20% tolerance. ‘’C’’ suffix denotes + 2% and ‘’D’’ suffix denotes + 1%.
NOTE 2. Zener voltage is measured with the device junction in thermal equilibrium at an ambient temperature of 25°C + 3°C.
NOTE 3. Zener impedance is derived by superimposing on IZTA 60HZ rms a.c. current equal to 10% of IZT.
NOTE 4: The values of IZM are calculated for a ±5% tolerance on nominal zener voltage. Allowance has been made for the rise in zener voltage above VZT which results from zener
impedance and the increase in junction temperature as power dissipation approaches 400mW. In the case of individual diodes IZM is that value of current which results in a
dissipation of 400mW at 75°C lead temperature at 3/8” from body.
NOTE 5: The surge for IZM is a square wave or equivalent half-sine wave pulse of 1/120 second duration.
MECHANICAL CHARACTERISTICS
Case
Hermetically sealed glass DO-35
Marking
Body painted, alph-numeric
Polarity
Cathode band
Dimensions
Inches
Millimeters
Min
Max
Min
Max
BD
0.055
0.090
1.400
2.290
BL
0.120
0.200
3.050
5.080
LD
0.018
0.022
0.460
0.560
LL
1.000
1.500
25.400
38.100
Available Non-RoHS (standard) or RoHS compliant (add PBF suffix)
Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number
144 Market Street
Kenilworth NJ 07033 USA
phone +1.908.245-7200
fax +1.908.245-0555
sales@digitroncorp.com
www.digitroncorp.com
Rev. 20120730
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