BY251-BY255
3.0 AMP. Silicon Rectifiers
DO-201AD
Features
High efficiency, Low VF
High current capability
High reliability
High surge current capability
Low power loss
Mechanical Data
Cases: Molded plastic
Epoxy: UL 94V-0 rate flame retardant
Polarity: Color band denotes cathode
High temperature soldering guaranteed:
o
260 C/10 seconds/.375”,(9.5mm) lead
lengths at 5 lbs., (2.3kg) tension
Weight: 1.2 grams
Dimensions in inches and (millimeters)
Maximum Ratings and Electrical Characteristics
Rating at 25
o
C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%
Type Number
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified
Current . 375 (9.5mm) Lead Length
o
@T
A
= 75 C
Peak Forward Surge Current, 8.3 ms Single
Half Sine-wave Superimposed on Rated
Load (JEDEC method )
Maximum Instantaneous Forward Voltage
@ 3.0A
Maximum DC Reverse Current @ T
A
=25 C
o
at Rated DC Blocking Voltage @ T
A
=125 C
Maximum Full Load Reverse Current, Full
Cycle Average .375”(9.5mm) Lead Length
@T
L
=75℃
Typical Junction Capacitance
Operating Temperature Range
( Note 1 )
Typical Thermal Resistance ( Note 2 )
o
Symbol
V
RRM
V
RMS
V
DC
I
(AV)
I
FSM
V
F
I
R
BY251 BY252 BY253 BY254 BY255
Units
200
140
200
400
280
400
600
420
600
3.0
800
560
800
1300
910
1300
V
V
V
A
150
1.0
5.0
100
30
40
40
-65 to +150
-65 to +150
A
V
uA
uA
uA
pF
C/W
o
C
o
C
HT
IR
Cj
R
θJA
T
J
o
Storage Temperature Range
T
STG
1. Measured at 1 MHz and Applied Reverse Voltage of 4.0 V D.C.
Notes:
2. Mount on Cu-Pad Size 16mm x 16mm on P.C.B.
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mail:lge@luguang.cn
BY251-BY255
3.0 AMP. Silicon Rectifiers
RATINGS AND CHARACTERISTIC CURVES (BY251 THRU BY255)
FIG.1- MAXIMUM FORWARD CURRENT
DERATING CURVE
FIG.2- TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS REVERSE CURRENT. ( A)
100
AVERAGE FORWARD CURRENT AMPERES
4
3
Tj=125
0
C
1
2
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
0.375" (9.5mm)
Lead Length
0
25
50
75
100
o
1
0.1
Tj=25
0
C
0.01
0
20
40
60
80
100
120
PERCENT OF RATED PEAK REVERSE VOLTAGE. (%)
140
0
125
150
175
AMBIENT TEMPERATURE. ( C)
PEAK FORWARD SURGE CURRENT. (A)
FIG.3- MAXIMUM NON-REPETITIVE FORWARD
SURGE CURRENT PER LEG
150
120
8.3ms Single Half Sine Wave
PER LEG. (JEDEC Method)
Tj=Tj max.
90
60
30
FIG.5- TYPICAL FORWARD
CHARACTERISTICS
100
2
5
10
20
50
100
NUMBER OF CYCLES AT 60Hz
0
0
FIG.4- TYPICAL JUNCTION CAPACITANCE
100
INSTANTANEOUS FORWARD CURRENT. (A)
30
10
JUNCTION CAPACITANCE.(pF)
3
1
Tj=25
o
C
Pulse Width=300 s
1% Duty Cycle
50
Tj=25
0
C
10
5
0.1
0.03
0.01
0.4
1
1
5
10
REVERSE VOLTAGE. (V)
50
100
0.6
0.8
1.0
1.2
1.4
FORWARD VOLTAGE. (V)
1.6
1.8
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