Motorola MURH840CT Datasheet
SEMICONDUCTOR TECHNICAL DATA
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by MURH840CT/D
. . . designed for use in switching power supplies, inverters and as
free wheeling diodes, these state–of–the–art devices have the
following features:
• Ultrafast 28 Nanosecond Recovery Time
• 175°C Operating Junction Temperature
• Popular TO–220 Package
• Epoxy Meets UL94, VO @ 1/8″
• High Temperature Glass Passivated Junction
• High Voltage Capability to 400 Volts
• Low Leakage Specified @ 150°C Case Temperature
• Current Derating @ Both Case and Ambient Temperatures
Mechanical Characteristics:
• Case: Epoxy, Molded
• Weight: 1.9 grams (approximately)
• Finish: All External Surfaces Corrosion Resistant and Terminal
1
Leads are Readily Solderable
• Lead Temperature for Soldering Purposes: 260°C Max. for
3
10 Seconds
• Shipped 50 units per plastic tube
• Marking: UH840
MAXIMUM RATINGS
Rating Symbol Value Unit
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
Average Rectified Forward Current Per Leg
Total Device, (Rated VR), TC = 120°C Total Device
Peak Repetitive Forward Current Per Diode Leg
(Rated VR, Square Wave, 20 kHz), TC = 120°C
Nonrepetitive Peak Surge Current
(Surge applied at rated load conditions halfwave, single phase, 60 Hz)
Controlled Avalanche Energy W
Operating Junction Temperature and Storage T emperature TJ, T
THERMAL CHARACTERISTICS, PER DIODE LEG
Maximum Thermal Resistance, Junction to Case R
ELECTRICAL CHARACTERISTICS, PER DIODE LEG
Maximum Instantaneous Forward Voltage (1)
(iF = 4.0 Amps, TC = 150°C)
(iF = 4.0 Amps, TC = 25°C)
Maximum Instantaneous Reverse Current (1)
(Rated dc Voltage, TC = 150°C)
(Rated dc Voltage, TC = 25°C)
Maximum Reverse Recovery Time
(IF = 1.0 Amp, di/dt = 50 Amps/µs)
(1) Pulse Test: Pulse Width = 300 µs, Duty Cycle ≤ 2.0%.
V
RRM
V
RWM
V
I
F(AV)
I
FM
I
FSM
AVAL
θJC
v
Motorola Preferred Device
ULTRAFAST
RECTIFIER
8.0 AMPERES
400 VOL TS
4
2, 4
R
stg
F
i
R
t
rr
1
2
3
CASE 221A–06
TO–220AB
400 Volts
4.0
8.0
16 Amps
100 Amps
20 mJ
*
65 to +175 °C
3.0 °C/W
1.9
2.2
500
10
28 ns
Amps
Volts
µA
SWITCHMODE is a trademark of Motorola, Inc.
Preferred devices are Motorola recommended choices for future use and best overall value.
Rev 1
Rectifier Device Data
Motorola, Inc. 1996
1
MURH840CT
100
50
20
10
5
2
1
, INSTANTANEOUS FORWARD CURRENT (AMP)
F
i
0.5
0.2
0.1
TJ = 150°C
100°C
vF, INSTANTANEOUS VOLTAGE (VOLTS)
25°C
1000
500
200
µ
100
50
20
10
5
2
, REVERSE CURRENT ( A)
1
R
I
0.5
0.2
0.1
0
50 100 150 200 250 300 350 400
VR, REVERSE VOLTAGE (VOLTS)
TJ = 150°C
100°C
25°C
Figure 2. T ypical Reverse Current, Per Leg
7
6
5
4
3
2
, AVERAGE FORW ARD CURRENT (AMPS)
1
F(AV)
I
2.42.221.81.61.41.210.80.60.4
0
SQUARE
WAVE
40200
TA, AMBIENT TEMPERATURE (°C)
DC
80 100 120 140 160 180 200
60
, AVERAGE POWER DISSIPATION (WA TTS)
F
I
Figure 1. T ypical Forward Voltage
10
8
6
4
2
0
SQUARE
120 130 140 150 160 170 180
110
TC, CASE TEMPERATURE (°C)
DC
WAVE
Figure 4. Current Derating, Case, Per Leg
RATED VR APPLIED
Figure 3. Forward Current Derating, Ambient, Per Leg
1000
100
10
C, CAPACITANCE (pF)
1
0.01
0.1 1 10 100
VR, REVERSE VOLTAGE (VOLTS)
Figure 5. T ypical Capacitance, Per Leg
2
Rectifier Device Data
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