High efficiency, Low VF
High current capability
High reliability
High surge current capability
Low power loss
BY25X = Specific Device Cod
e
G = Green Compound
Y = Year
WW = Work Week
Maximum Ratings and Electrical Characteristics
Rating at 25 ℃ ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%
Symbol BY251 BY252 BY253 BY254 Units
VRRM 200 400 600 800 V
VRMS 140 280 420 560 V
VDC 200 400 600 800 V
uA
uA
Cj pF
RθJA OC/W
TJOC
TSTG OC
Note1: Pulse Test with PW=300 usec, 1% Duty Cycle
Note2: Measured at 1 MHz and Applied Reverse Voltage of 4.0V D.C.
Note3: Mount on Cu-Pad Size 16mm × 16mm on P.C.B.
Maximum Instantaneous Forward Voltage (Note 1)
@ 3 A VF1.0 V
Peak Forward Surge Current, 8.3 ms Single Half Sine-wave
Superimposed on Rated Load (JEDEC method) IFSM 150 A
Maximum Average Forward Rectified Current
.375"(9.5mm) Lead Length @TA=75℃IF(AV) 3A
Maximum Recurrent Peak Reverse Voltage
Polarity: Color band denotes cathode
Weight: 1.2 grams
Type Number
Lead: Pure tin plated, lead free, solderable per
MIL-STD-202, Method 208 guaranteed
High temperature soldering guaranteed: 260℃/10s
/.375", (9.5mm) lead lengths at 5 lbs, (2.3kg) tension
Maximum DC Reverse Current at @ TA=25 ℃
Rated DC Blocking Voltage @ TA=125℃100
40
- 65 to + 150
5
Typical Thermal Resistance (Note 3)
Maximum Full Load Reverse Current, Full
Cycle Average .375"(9.5mm) Lead Length
@TL=75℃
Maximum RMS Voltage
BY251 - BY254
3.0 AMPS. Silicon Rectifiers
Marking Diagram
DO-201AD
Dimensions in inches and (millimeters)
Epoxy: UL 94V-0 rate flame retardant
Cases: Molded plastic
Features
Green compound with suffix "G" on packing
code & prefix "G" on datecode
Mechanical Data
40
Maximum DC Blocking Voltage
IR
Typical Junction Capacitance (Note 2)
IR(AV) uA30
Storage Temperature Range - 65 to + 150
Operating Temperature Range
Version:C10
Pb
RoHS
COMPLIANCE
RoHS
COMPLIANCE
RATINGS AND CHARACTERISTIC CURVES (BY251 THRU BY254)
Version:C10
FIG.1- MAXMUM FORWARD CURRENT
DERATING CURVE
0
1
2
3
4
0 25 50 75 100 125 150 175
AMBIENT TEMPERATURE(oC)
AVERAGE FORWARD
CURRENT(A)
RESISTIVE OR
INDUCTIVE LOAD
FIG. 3- MAXIMUM NON-REPETITIVE FORWARD
SURGE CURRENT PER LEG
0
30
60
90
120
150
180
1 10 100
NUMBER OF CYCLES AT 60 Hz
PEAK FORWARD SURGE
CURRENT(A)
8.3ms Single Half Sine Wave
(JEDEC Method)
FIG. 2- TYPICAL REVERSE
CHARACTERISTICS
0.01
0.1
1
10
0 20 40 60 80 100 120 140
PERCENT OF RATED PEAK REVERSE VOLTAGE
(%)
INSTANTANEOUS REVERSE CURRENT (uA)
TA=25℃
TA=125℃
FIG. 4- TYPICAL JUNCTION CAPACITANCE
1
10
100
1 10 100
REVERSE VOLTAGE (V)
JUNCTION CAPACITANCE (pF)
TA=25℃
FIG. 5- TYPICAL FORWARD
CHARACTERISTICS
0.01
0.1
1
10
100
0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
FORWARD VOLTAGE (V)
INSTANTANEOUS FORWARD
CURRENT (A)
TA=25℃
Pulse Width=300us
1% Duty Cycle
