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Motorola Electronic Components Datasheet

MR872 Datasheet

FAST RECOVERY POWER RECTIFIERS

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MR870 MR871
MR872 MR874
MR876
® MOTOROLA
Designers Data Sheet
II
STUD MOUNTED
FAST RECOVERY POWER RECTiFIERS
.. designed for special applications such as dc power supplies,
inverters, converters, ultrasonic systems, choppers, low RF inter-
ference, sonar power supplies and free wheeling diodes. A complete
line of fast recovery rectifiers having typical recovery time of 150
nanoseconds providing high efficiency at frequencies to 250 kHz.
Designer's Data for "Worst Case" Conditions
The Designers Data sheets permit the design of most circuits entirely from the
information presented. Limit curves - representing boundaries on device character~
isties - are given to facilitate "worst case" design.
MAXIMUM RATINGS
Rating
Peak Repetitive Reverse VOltage
Working Peak Reverse Voltage
DC Block ing Voltage
on-Repetitive Peak Reverse Voltage
RMS Reverse Voltage
Average ectl lea OMaro I".urrent
tSingle phase, resistive load,
TC ~ lOo"CI
Non-Hepetitive eak Surge !.;urrent
(surge applied at rated load
conditions)
Operating Junction Temperature
Range
Storage Temperature Range
Svmbol
VRRM
VRWM
VA
VRSM
VAIAMSI
10
MR870 MR871 MR872
50 100 200
5 ~ 250
35 70 140
_---50
MR874
400
450
280
MR8?6
600
650
420
'FSM
TJ
Tst9
400
-65 to +160
-65 to +175
Unit
Volts
Volts
Volts
Amps
Amps
°c
C
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance, Junction to Case
Symbol
R8JC
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Min
Tv.
Max
Unit
Instantaneous Forward Voltage
(iF'" 157 Amp, TJ = 160DcI
'F
1.3 1.6 Volts
Forward Voltage
(IF = 50 Amp, TC '" 250 CI
Reverse Current (rated dc voltage)
TC = 25°C
Te'" 100°C
VF
'A
1.1 1.4 Volts
25 50 ,.A-
1.0 2.0 mA
REVERSE RECOVERY CHARACTERISTICS
Characteristic
Symbol
Min
TV.
Max
Unit
n.Reverse Recoverv Time
-(IF" 1.0 Amp to VR '" 30 Vdc, Figure 16)
t"
150 200
IIFM" 36 Amp, di/dt .. 25 A/lls,Figure 17)
- 240 400
everse Mecovery \"Ourrent
AMIAECI
(IF -1.0Amp toVR =30Vdc, Figure 16)
2.0 3.0 Amp
MECHANICAL CHARACTERISTICS
CASE: Welded, hermetically sealed
FINISH: All external surfaces
corrosion resistant
and readily solderable
POLARITY: Cathode to Case
WEIGHT: 17 grams (approximately)
STUD TORQUE: 25 in. Ibs.
FAST RECOVERY
POWER RECTIFIERS
50-600 VO LTS
50 AMPERES
K
1/4-28 UNF·2A
TERM.2
MILLIMETERS INCHES
DIM MIN MAX MIN MAX
A 16.94 17.45 0.669 0.687
B 16.94 0.667
-C 11.43
0.450
0 9.53 0.375
-E 2.92 5.08 0.115 0.200
F 2.03 0.080
J 10.72 11.51 0.422 0.453
-K 25.40
1.000
-L 3.86
0.156
P 5.59 6.32 0.220 0.249
Q 3.56 4.45 0.140 0.175
R 20.16
0.794
S 2.26 0.089
NOTES:
1. DIM "P" IS DIA.
2. CHAMFER OR UNDERCUT ON ONE OR BOTH ENOS
OF HEXAGONAL BASE IS OPTIONAL.
3. ANGULAR ORIENTATION AND CONTOUR OF
TERMINAL ONE IS OPTIONAL.
4. THREADS ARE PLATED.
5. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5, 1973.
CASE 257·01
D0-5
3-228


Motorola Electronic Components Datasheet

MR872 Datasheet

FAST RECOVERY POWER RECTIFIERS

No Preview Available !

MR870, MR871, MR872, MR874, MR876
5IW
300
200
100
~ 70
5 SO
~
B 30
c
i'" 20
:!
'!l
~ 10
~
~ 7.0
~ 5.0
.ai-
3.0
2.0
FIGURE 1 - FORWARD VOLTAGE
I
J /T}:25 C
...... V
/' ./
'-;;OOC
V/
l-V
I
R
,"
I
I
I
II
..-
1.0
o.7
O.5
0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2
VF,INSTANTANEOUS FORWARO VOLTAGE (VOLTS)
FIGURE 2 - MAXIMUM SURGE CAPABILITY
100 ...........
90
0-
0-
r-..
1\
I'-
1\
I111 I I I
II
Prior to surge, the rectifier
is operated such that TJ '" 160oC;
VRRM may be applied between
each cycla ofsurga
i'NJ
III"' r--
1\
1-----l-1 CYCLE
0 I IIII
0
o
I
1111
1.0 2.0 3.0 5.0 7.0 10
20 30
NUMBER OF CYCLES AT 60 Hz
50 70 100
NOTE 1
J U LPk Ppk
tp
DUTY CYCLE, 0 '" tpltl
PEAK POWER, Ppk. is plllk of an
IQuivalentsquartpOW8l"pulsa.
~,,-----l
TIME
To determine maximum junction temperature of the diode in a given situation,
the following proclldure is recommended:
The temperature of the case should be measured using a thermocouple piKed
on the elsa .t the temperature raterance point lsee Note 31. The th.mal mass
connected to the ca. is normally large enough so that it will not signifil:tntly
respondtoh8lt$llrg8$genaratad in the diodeas. result 01 pulsed oplrationonct
steady-state conditions are achieved. Using the measured value of Te. the junction
temp.ature may be determined by:
TJ"Te+ 6TJC
where t:. TJC is thl increase in junction tempereture abOYt the case tempereture.
It may be detlrmined by:
!J. TJC" Ppk 'R8JC 10 + fl· 01 . r{tl +tpl +r(tpl- r(qll
w. . . .
rll) ::: normalized value of transient th8fmal resistance al time. t. from Figure
3.LI.:
r Itt + tpl .. normalized value of transient thermal resistance al tima tl+tp·
1.0
5
3
2
1
5
3~
~ 0.02
0.0 1
0.1
0.2
FIGURE 3 - THERMAL RESPONSE
~
~~
(SEE NOTE 1)
0.5 1.0 2.0
5.0 10
20 so 100 200
t,TIME(ms)
500 1000 2000
5000 10,000
3-229


Part Number MR872
Description FAST RECOVERY POWER RECTIFIERS
Maker Motorola
Total Page 5 Pages
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