BY251 thru BY255
MEDIUM CURRENT PLASTIC RECTIFIER
CHENG- YI
ELECTRONIC
VOLTAGE RANGE-200 TO 1300 Volts
CURRENT -3.0 Amperes
DO-201AD
FEATURE
High surge current capability
Plastic package has underwriters laboratory
Flammability classification 94V-O
Low leakage
Void-free molded in DO-201AD plastic
package
High current operation of 3 Amperse
at TA=95
0
C with no thermal runaway
Exceeds enviromental standard of MIL-STD-
19500/228
MECHANICAL DATA
Case:JEDEC D0-201AD molded plastic
Trminals:plated axials leads ,solderable per
MIL-STD-750, Method 2026
Polarity:Color band denotes cathode
Weight:0.04 ounce, 1.1gram
Mounting Position:Any
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
0
C ambient temperature unless otherwise specified.
60Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
BY251
BY252
400
280
400
BY253
600
420
600
3.0
BY254
800
560
800
BY255
1300
910
1300
UNITS
V
V
V
A
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
.375", (9.5mm) lead lengths at
T A=95 C
0
V
RRM
V
RMS
V
DC
I
(AV)
200
140
200
Peak Forward Surge Current
8.3 ms single half sine-wave superimposed on
rated load (JEDEC method)
Maximum Instantaneous Forward Voltage
TJ =25 C
at 3.0A
T J =100 C
0
0
I
FSM
100.0
A
V
F
I
R
1.1
1.0
5.0
500
28.0
2.5
15.0
-55 to +150
0
V
Maximum DC Reverse Current
TA=25 C
at Rated DC Blocking Voltage
TA =100 C
0
0
Typical Junction Capacitance (Note 2)
TJ =25 C
0
C
J
T
RR
T JA
T
J
pF
Typical Reverse Recovery Time (Note 3)
Typical Thermal Resistance (Note1)
Operating Junction Temperature Range
Storage Temperature Range
C/W
0
C
C
-55 to +150
T
STG
Notes : 1. Thermal Resistance from Junction to applied at ambient .375" (9.5mm) lead lengths, P.C. Board mounted.
2. Measured at 1 MHz and applied reverse voltage of 4.0 volts.
3. Reverse Recovery Test Conditions : I
F
=0.5A, I
R
=1.0A, Irr=0.25A.
0
BY251 thru BY255
MEDIUM CURRENT PLASTIC RECTIFIER
CHENG- YI
ELECTRONIC
RATING AND CHARACTERISTICS CURVES
BY251 THRU BY255
Fig.2
-
MAXIMUM PEAK FORWARD
SURGE CURRENT
200
Fig.1 - FORWARD CURRENT DERATING CURVE
8
1=.25"(6.3mm)
1=.301"(.79min)
TJ=Both Leads to
Heat Sink with
Lengths (f) AS shown
PEAK FORWARD SURGE
CURRENT, (A)
8.3ms Single Half Sine Wave
JEDEC Method
100
50
NON-REPETIVE
0
TJ=150C
7
AVERAGE FORWARD
CURRENT AMPERES
6
1=.50"(12.7mm)
5
4
3
2
1
0
40
60
80
100
120
0
REPETIVE
10
1
5
10
50
100
TA=Ambient Temperature
0.275(9.5mm) Lead
Lengths P Board mounting
.C.
Resistive or inductive Load
NUMBER OF CYCLES AT 60 Hz
140
160
180
TEMPERATURE, C
Fig.4 - TYPICAL JUNCTION CAPACITANCE
100
CAPACITANCE-pF
50
Fig.3
-
TYPICAL INSTANTANEOUS
FORWARD CHARACTERISTICS
100
10
5
0
TJ=25C
f=1MHz
Visg=50m Vp-p
INSTANTANEOUS FORWARD CURRENT, (A)
1
30
5
10
50
100
REVERSE VOLTAGE(V)
10
3.0
Fig.5 - TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS
REVERSE
CURRENT, (mA)
10
1.0
0
TJ=25C
Pulse Width-300 s
2% DUTY CYCLE
0.3
0
TA=100C
1.0
0.1
0.1
0
TA=25C
.03
.01
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
INSTANTANEOUS FORWARD VOLT
AGE, (V)
.01
0
20
40
60
80
100
120
140
PERCENT OF RATED PEAK
REVERSE VOLTAGE, (%)
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