FAST RECOVERY RECTIFIER
VOLTAGE RANGE 200 to 1000 Volts CURRENT 1.0 Ampere
RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICA TION
FEATURES
* High switching capability
* Low leakage
* Low forward voltage drop
* High current capability
* High surge current capability
MECHANICAL DATA
* Case: Molded plastic
* Epoxy: Device has UL flammability classification 94V-O
* Lead: MIL-STD-202E method 208C guaranteed
* Mounting position: Any
* Weight: 0.33 gram
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 oC ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
ELECTRICAL CHARACTERISTICS
(At TA = 25oC unless otherwise noted)
1N4942
THRU
1N4948
DO-41
MAXIMUM RATINGS
(At TA = 25oC unless otherwise noted)
NOTES : 1. Test Conditions: IF = 0.5A, IR = -1.0A, IRR = -0.25A
2. Measured at 1 MH
Z
and applied reverse voltage of 4.0 volts
Dimensions in inches and (millimeters)
2002-11
RATINGS
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
at T
A
= 75
o
C
Peak Forward Surge Current 8.3 ms single half sine-wave
superimposed on rated load (JEDEC method)
Typical Junction Capacitance (Note 2)
Operating and Storage Temperature Range
SYMBOL
V
RRM
V
DC
I
O
I
FSM
C
J
T
J
, T
STG
V
RMS
Volts
Volts
Volts
Amps1.0
30
15
-55 to + 150
Amps
pF
0
C
UNITS
200 600 800 1000400
140 420 560 700280
200 600 800 1000400
1N4942 1N4946 1N4947 1N49481N4944
at Rated DC Blocking Voltage T
A
= 25
o
C
CHARACTERISTICS
Maximum Full Load Reverse Current Full Cycle
Average, .375” (9.5mm) lead length at T
L
= 55
o
C
Maximum Reverse Recovery Time (Note 1)
V
F
SYMBOL
I
R
trr
1.3
5.0
100
250
uAmps
uAmps
nSec
Maximum DC Reverse Current
Maximum Instantaneous Forward Voltage at 1.0A DC Volts
150 500
UNITS1N4942 1N4946 1N4947 1N49481N4944
1.0 (25.4)
MIN.
.166 (4.2)
.205 (5.2)
1.0 (25.4)
MIN.
.107 (2.7)
.080 (2.0) DIA.
.034 (0.9)
.028 (0.7) DIA.
RECTRON
RATING AND CHARACTERISTIC CURVES ( 1N4942 THRU 1N4948 )
JUNCTION CAPACITANCE, (pF)
FIG. 3 - TYPICAL JUNCTION CAPACITANCE
REVERSE VOLTAGE, ( V )
200
100
60
40
20
10
6
4
2
1.1 .2 .4 1.0 2 4 10 20 40 100
TJ = 25
FIG. 1 - TYPICAL FORWARD CURRENT
AVERAGE FORWARD CURRENT, (A)
AMBIENT TEMPERATURE, ( )
DERATING CURVE
1.0
.8
.6
.4
.2
00 25 50 75 100 125 150 175
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
FIG. 2 - MAXIMUM NON-REPETITIVE FORWARD
FORWARD SURGE CURRENT, (A)
NUMBER OF CYCLES AT 60Hz
SURGE CURRENT
1
20 4 6 8 10 20 40 6080100
50
40
30
20
10
0
8.3ms Single Half Sine-Wave
(JEDED Method)
FIG. 2 - TYPICAL INSTANTANEOUS
FORWARD CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT, (A)
INSTANTANEOUS FORWARD VOLTAGE, (V)
TJ = 25
Pulse Width=300uS
1% Duty Cycle
.4 .6 .8 1.0 1.2 1.4 1.6
10
1.0
.1
.01
FIG. 4 - TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS REVERSE CURRENT, (uA)
PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)
TJ = 25
TJ = 75
TJ = 125
20
10
1.0
.1
.01 0 20 40 60 80 100 120 140
trr
+0.5A
0
-0.25A
-1.0A 1cm SET TIME BASE FOR
50/100 ns/cm
FIG. 6 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY
50
NONINDUCTIVE 10
NONINDUCTIVE
D.U.T
25 Vdc
(approx)
( - )
( - )
( + )
( + )
1
NON-
INDUCTIVE
OSCILLOSCOPE
(NOTE 1)
PULSE
GENERATOR
(NOTE 2)
NOTES:
1 Rise Time = 7ns max. Input Impedance =
1 megohm. 22pF.
2. Rise Time = 10ns max. Source Impedance =
50 ohms.
TIME CHARACTERISTIC
