RECOVERY RECTIFIERS. 1N4944 Datasheet

1N4944 RECTIFIERS. Datasheet pdf. Equivalent


Part 1N4944
Description FAST RECOVERY RECTIFIERS
Feature 1N4942 THRU 1N4948 DO-41 0.107(2.7) 0.080(2.0) DIA. 1.0 (25.4) MIN. 0.205(5.2) 0.166(4.2) 0.034(.
Manufacture MDD
Datasheet
Download 1N4944 Datasheet


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1N4944
1N4942 THRU 1N4948
DO-41
0.107(2.7)
0.080(2.0)
DIA.
1.0 (25.4)
MIN.
0.205(5.2)
0.166(4.2)
0.034(0.86)
0.028(0.70)
DIA.
1.0 (25.4)
MIN.
Dimensions in inches and (millimeters)
FAST RECOVERY RECTIFIERS
Reverse Voltage - 200 to 1000 Volts Forward Current - 1.0 Ampere
FEATURES
The plastic package carries Underwriters Laboratory
Flammability Classification 94V-0
Fast switching for high efficiency
Low reverse leakage
High forward surge current capability
High temperature soldering guaranteed:
250 C/10 seconds,0.375(9.5mm) lead length,
5 lbs. (2.3kg) tension
MECHANICAL DATA
Case: JEDEC DO-41 molded plastic body
Terminals: Plated axial leads, solderable per MIL-STD-750,
Method 2026
Polarity: Color band denotes cathode end
Mounting Position: Any
Weight:0.012 ounce, 0.33 grams
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 C ambient temperature unless otherwise specified.
Single phase half-wave 60Hz,resistive or inductive load,for capacitive load current derate by 20%.
MDD Catalog Number
Maximum repetitive peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Maximum average forward rectified current
0.375(9.5mm) lead length at TA =75 C
Peak forward surge current
8.3ms single half sine-wave superimposed on
rated load (JEDEC Method)
Maximum instantaneous forward voltage at 1.0A
Maximum DC reverse current TA=25 C
at rated DC blocking voltage TA=100 C
Maximum reverse recovery time (NOTE 1)
Typical junction capacitance (NOTE 2)
Typical thermal resistance (NOTE 3)
Operating junction and storage temperature range
SYMBOLS
VRRM
VRMS
VDC
I(AV)
1N
4942
200
140
200
1N
4944
400
280
400
1N
4946
600
420
600
1.0
1N
4947
800
560
800
IFSM
VF
IR
trr
CJ
RθJA
TJ,TSTG
30.0
1.3
5.0
50.0
150 250
15.0
50.0
-65 to +150
Note:1.Reverse recovery condition IF=0.5A,IR=1.0A,Irr=0.25A
2.Measured at 1MHz and applied reverse voltage of 4.0V D.C.
3.Thermal resistance from junction to ambient at 0.375(9.5mm)lead length,P.C.B. mounted
1N
4948
1000
700
1000
UNITS
VOLTS
VOLTS
VOLTS
Amp
Amps
Volts
µA
500 ns
pF
C/W
C



1N4944
RATINGS AND CHARACTERISTIC CURVES 1N4942 THRU 1N4948
FIG. 1- FORWARD CURRENT DERATING CURVE
1.0
0.8
0.6
0.4 Single Phase
Half Wave 60Hz
Resistive or
inductive Load
0.2
0
0 25 50 75 100 125 150 175
AMBIENT TEMPERATURE, C
FIG. 3-TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
20
10
1
0.1
0.01
0.6
0.8
TJ=25 C
PULSE WIDTH=300 µs
1%DUTY CYCLE
1.0 1.2 1.4 1.5
INSTANTANEOUS FORWARD VOLTAGE,
VOLTS
FIG. 5-TYPICAL JUNCTION CAPACITANCE
200
100 TJ=25 C
10
FIG. 2-MAXIMUM NON-REPETITIVE PEAK FORWARD
SURGE CURRENT
30
25
20
15
10
8.3ms SINGLE HALF SINE-WAVE
(JEDEC Method)
5.0
1
10
NUMBER OF CYCLES AT 60 Hz
100
FIG. 4-TYPICAL REVERSE CHARACTERISTICS
1,000
100
10
TJ=100 C
1
0.1
TJ=25 C
0.01 0
20 40
60 80 100
PERCENT OF PEAK REVERSE VOLTAGE,%
FIG. 6-TYPICAL TRANSIENT THERMAL IMPEDANCE
100
10
1
1
0.1
1.0
10 100
REVERSE VOLTAGE,VOLTS
0.1
0.01
0.1 1
10
t,PULSE DURATION,sec.
The cruve graph is for reference only, can't be the basis for judgment(曲线图仅供参考)!
100







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