RA
DIMENSION
INCHES
MM
DIM
MIN MAX MIN MAX
NOTE
A .380 .410 9.70 10.40
B .165 .185 4.19 4.70
C .215 .225 5.50 5.70
D .235 .250 6.00 6.40
E -----
5
o
-----
5
o
NOM
Features
l
Plastic Material Used Carriers Underwrites Laboratory
Classification 94V-O
l
Low Cost Construction Utilizing Void-free Molded Plastic
Technique
l
High Surge Capability
l
Diffused Junction
Maximum Ratings
l
Operating & Storage Temperature: -50
o
C to +175
o
C
l
For Capacitive Load, Derate Current by 20%
RA251
50V
35V
50V
RA252
100V
70V
100V
RA253
200V
140V
200V
RA254
400V
280V
400V
RA255
600V
420V
600V
RA256
800V
560V
800V
RA257
1000V
700V
1000V
MCC Part
Number
Maximum
Recurrent
Peak
Reverse
Voltage
Maximum
RMS Voltage
Maximum
DC
Blocking
Voltage
Electrical Characteristics @ 25
o
C Unless Otherwise Specified
Average Forward
Current
I
F(AV)
25.0A T
C
=150
o
C
Peak Forward Surge
Current
I
FSM
400A
8.3ms half
sine
Maximum
Instantaneous
Forward Voltage
V
F
1.1V
I
FM
=25.0A
T
A
=25
o
C
Maximum DC
Reverse Current At
Rated DC Blocking
Voltage
I
R
5.0uA T
C
=25
o
C
Typical Reverse
Recovery Times
t
rr
3.0us
I
F
=0.5A,
I
R
=1.0A,
I
rr
=0.25A
Typical Junction
Capacitance
C
j
300pF
Measured at
1.0MHz,
V
R
=4.0V
RA251
THRU
RA257
25.0 Amp High
Current Plastic Silicon
Rectifier
50 to 1000 Volts
A
B
C
D
E
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omponents
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RA251 thru RA257
RATINGS AND CHARACTERISTIC CURVES
FIG.4- TYPICAL REVERSE CHARACTERISTICS
INST
ANT
ANEOUS
REVERSE
CURRENT
.(
A
)
0
20
40
60
80
100
120
140
0.1
0.6
0.4
0.2
1
6
4
2
10
60
40
20
100
PERCENT OF RATED PEAK REVERSE VOLTAGE. (%)
Tj=25 C
0
FIG.3- TYPICAL FORWARD CHARACTERISTICS
INST
ANT
ANEOUS
FOR
W
ARD
CURRENT
.
(A)
0.6
1.0
1.4
1.8
2.2
2.6
0.1
1.0
10
100
1000
FORWARD VOLTAGE. (V)
Tj=25 C
PULSE WIDTH-300 S
2% DUTY CYCLE
0
FIG.5- TYPICAL JUNCTION CAPACITANCE
JUNCTION
CAP
ACIT
ANCE.(pF)
1
5
2
10
20
50
100
50
100
500
1000
REVERSE VOLTAGE. (V)
Tj=25 C
0
f=1.0MHz
Vsig=50mVp-p
FIG.1- MAXIMUM FORWARD CURRENT DERATING
CURVE
A
VERAGE
FOR
W
ARD
CURRENT
.
(A)
125
135
145
155
175
165
0
10
20
30
40
50
CASE TEMPERATURE. ( C)
o
HALF SINE WAVE 60Hz
RESISTIVE OR
INDUCTIVE LOAD
FIG.2- MAXIMUM NON-REPETITIVE PEAK FORWARD
SURGE CURRENT
PEAK
FOR
W
ARD
SURGE
CURRENT
.
(A)
1
10
100
200
60
80
300
100
400
600
NUMBER OF CYCLES AT 60Hz
8.3ms Single Half Sine Wave
JEDEC Method
Tj=25 C
0
Tj=150 C
0
cycle
M C C
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mccsemi
.com
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