1SMB5945 Taiwan Semiconductor, 1SMB5945 Datasheet - Page 4

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1SMB5945

Manufacturer Part Number
1SMB5945
Description
Zener Diodes 68 Volt 3 Watt 5%
Manufacturer
Taiwan Semiconductor
Datasheet

Specifications of 1SMB5945

Zener Voltage
68 V
Voltage Tolerance
5 %
Zener Current
22 mA
Power Dissipation
550 mW
Maximum Reverse Leakage Current
1 uA
Maximum Zener Impedance
120 Ohms
Mounting Style
SMD/SMT
Package / Case
SMB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
R4

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1000
100
120
100
10
80
60
40
20
0
200
100
0
FIG.7- EFFECT OF ZENER VOLTAGE
70
50
30
20
10
FIG.9- CAPACITANCE CURVE
FIG.11- PULSE WAVEFORM
7
5
3
2
5
t
d
10 s
7
PEAK VALUE
I
RATINGS AND CHARACTERISTIC CURVES (1SMB5926 THRU 1SMB5956)
MEASURED @
V /2
ppm
I (dc) =
Z
1
Z
10
10
BREAKDOWN VOLTAGE (VOLTS)
20mA
1mA
10mA
I ,
Z
HALF VALUE - I /2
ZENER CURRENT (mA)
2
t, TIME (ms)
T = 25 C
PW (I ) IS DEFINED AS THE
POINT WHERE THE PEAK CURRENT
DECAYS TO 50% OF I
A
20
D
o
30
10/1000 s WAVEFORM
AS DEFINED BY R.E.A.
pp
3
I (rms)= 0.1 I (dc)
Z
MEASURED @
ZERO BIAS
50
T = 25 C
pp-
J
4
70
Z
o
100
100
5
0.1 I
0.9 I
PEAK
PEAK
0.01
0.1
120
100
10
80
60
40
20
1000
1
0
500
200
100
5.0
2.0
1.0
50
20
10
0.01
0
FIG.10- TYPICAL PULSE RATING CURVE
0.5
FIG.12- PULSE WAVEFORM
FIG.8- EFFECT OF ZENER CURRENT
T
20 s
1
0.02
2
I ,
Z
0.1
ZENER TEST CURRENT (mA)
NONREPETITIVE, EXPONENTIAL
PULSE WAVEFORM, T = 25 C
Tp, PULSE WIDTH (ms)
5
0.5 I
0.04
t, TIME (ms)
PEAK
10
V = 150V
Z
91V
20
8/20 s WAVEFORM
AS DEFINED BY ANSI C62.1
AND IEC 801-5,
0.06
62V
1
50
T = 25 C
I (rms)= 0.1 I (dc)
Z
J
22V
Version: B08
100
J
0.08
o
12V
200
T = 8 s
o
Z
6.8V
500
0.1
10

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