CHENYI 1N4947

1N4942
Shanghai Lunsure Electronic
Technology Co.,Ltd
Tel:0086-21-37185008
Fax:0086-21-57152769
Features
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THRU
1N4948
1 Amp Fast Recovery
Rectifier
200 to 1000 Volts
Low Leakage Current
Metalurgically Bonded Construction
Low Cost
Fast Switching For High Efficiency
Maximum Ratings
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DO-41
Operating Temperature: -55°C to +125°C
Storage Temperature: -55°C to +150°C
Maximum Thermal Resistance; 50 °C/W Junction To Ambient
Catalog
Number
1N4942
1N4944
1N4946
1N4947
1N4948
Device
Marking
-----------
Maximum
Recurrent
Peak
Reverse
Voltage
200V
400V
600V
800V
1000V
Maximum
RMS
Voltage
Maximum
DC
Blocking
Voltage
140V
280V
420V
560V
700V
D
200V
400V
600V
800V
1000V
A
Cathode
Mark
B
Electrical Characteristics @ 25°C Unless Otherwise Specified
Average Forward
Current
Peak Forward Surge
Current
Maximum
Instantaneous
Forward Voltage
Maximum DC
Reverse Current At
Rated DC Blocking
Voltage
Maximum Reverse
Recovery Time
1N4942-4944
1N4946-4947
1N4948
Typical Junction
Capacitance
IF(AV)
1.0A
TA =55°C
IFSM
25A
8.3ms, half sine
VF
1.3V
IFM = 1.0A;
TA = 25°C*
IR
5.0µA
500µA
TJ = 25°C
TJ = 175°C
Trr
CJ
150ns
250ns
500ns
15pF
IF=0.5A,
IR=1.0A,
Irr=0.25A
Measured at
1.0MHz,
VR=4.0V
D
C
DIMENSIONS
DIM
A
B
C
D
INCHES
MIN
.166
.080
.028
1.000
*Pulse test: Pulse width 300 µsec, Duty cycle 2%
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MAX
.205
.107
.034
---
MM
MIN
4.10
2.00
.70
25.40
MAX
5.20
2.70
.90
---
NOTE
1N4942 thru 1N4948
Figure 1
Typical Forward Characteristics
20
Figure 2
Forward Derating Curve
10
1.2
6
4
1.0
2
Amps
.8
1
.6
.6
Amps
.4
.4
.2
25°C
.2
.1
Single Phase, Half Wave
60Hz Resistive or Inductive Load
.06
0
.04
0
50
75
100
125
150
175
°C
.02
.01
.4
.6
.8
1.0
1.2
Average Forward Rectified Current - Amperesversus
Ambient Temperature - °C
1.4
Volts
Instantaneous Forward Current - Amperesversus
Instantaneous Forward Voltage - Volts
Figure 3
Junction Capacitance
100
60
40
20
pF
TJ=25°C
10
6
4
2
1
.1
.2
.4
1
Volts
2
4
10
20
40
100
200
Junction Capacitance - pFversus
Reverse Voltage - Volts
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400
1000
1N4942 thru 1N4948
Figure 4
Typical Reverse Characteristics
Figure 5
Non-Repetitive Peak Forward Surge Current
100
30
60
40
25
20
20
10
15
6
4
Amps
TA=125°C
10
5
2
0
µAmps 1
1
2
4
6
.6
.4
8 10
20
40
60 80 100
Cycles
Peak Forward Surge Current - Amperesversus
Number Of Cycles At 60Hz - Cycles
TA=75°C
.2
.1
.06
.04
TA=25°C
.02
.01
20
40
60
80
100
120
140
Volts
Instantaneous Reverse Leakage Current - MicroAmperesversus
Percent Of Rated Peak Reverse Voltage - Volts
Figure 6
Reverse Recovery Time Characteristic And Test Circuit Diagram
50Ω
10Ω
trr
+0.5A
0
Pulse
Generator
Note 2
25Vdc
1Ω
Notes:
1. Rise Time = 7ns max.
Input impedance = 1 megohm, 22pF
2. Rise Time = 10ns max.
Source impedance = 50 ohms
3. Resistors are non-inductive
Oscilloscope
Note 1
-0.25
-1.0
1cm
Set Time Base for 20/100ns/cm
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