BY251G THRU BY255G
1 / 4
Yangzhou Yangjie Electronic Technology Co., Ltd.
S-A061
Rev.2.2,30-Jan-21
www.21yangjie.com
General Purpose Rectifier
Features
● High efficiency
● High current capability
● High reliability
● High surge current capability
● Low power loss
● Glass passivated chip junction
● Solder dip 275 °C max. 7 s, per JESD 22-B106
Typical Applications
For use in general purpose rectification of power
supplies, inverters, converters, and freewheeling diodes for
consumer, and telecommunication.
Mechanical Data
● Package:DO-201AD(DO-27)
Molding compound meets UL 94 V-0 flammability rating,
RoHS-compliant
● Terminals: Tin plated leads, solderable per J-STD-
002 and JESD22-B102
● Polarity:Color band denotes cathode end
■Maximum Ratings (Ta=25℃ Unless otherwise specified）
PARAMETER SYMBOL UNIT BY251G BY252G BY253G BY254G BY255G
Device marking code BY251G BY252G BY253G BY254G BY255G
Maximum Repetitive Peak Reverse Voltage VRRM V 200 400 600 800 1300
Maximum RMS Voltage VRMS V 140 280 420 560 910
Maximum DC blocking Voltage VDC V 200 400 600 800 1300
Average Forward Current
@60Hz sine wave, Resistance load, Ta =70℃ IF(AV) A 3.0
Forward Surge Current (Non-repetitive)
@60Hz Half-sine wave,1 cycle, Tj=25℃
IFSM A
200
Forward Surge Current (Non-repetitive)
@1ms, square wave, 1 cycle, Tj=25℃ 360
Current squared time
@1ms≤t8.3≤ms Tj=25℃，Rating of per diode I2t A2s 166
Typical junction capacitance
@Measured at 1MHz and Applied Reverse
Voltage of 4.0 V.D.C
Cj pF 40 31
Storage Temperature Tstg ℃ -55 ~ +150
Junction Temperature Tj ℃ -55 ~ +150
■Electrical Characteristics（Ta=25℃ Unless otherwise specified）
PARAMETER SYMBOL UNIT TEST CONDITIONS BY251G BY252G BY253G BY254G BY255G
Maximum instantaneous
forward voltage drop per diode VF V IFM=3.0A 1.0
Maximum DC reverse current at
rated DC blocking voltage per
diode
IR μA
Tj =25℃ 2.5
Tj =125℃ 100
COMPLIANT
RoHS
BY251G THRU BY255G
2 / 4
Yangzhou Yangjie Electronic Technology Co., Ltd.
S-A061
Rev.2.2,30-Jan-21
www.21yangjie.com
■Thermal Characteristics （Ta=25℃ Unless otherwise specified）
PARAMETER SYMBOL UNIT BY251G BY252G BY253G BY254G BY255G
Typical Thermal Resistance RθJ-A ℃/W 30
■Ordering Information (Example)
PREFERED P/N PACKAGE CODE UNIT WEIGHT(g) MINIMUM
PACKAGE(pcs)
INNER BOX
QUANTITY(pcs)
OUTER CARTON
QUANTITY(pcs) DELIVERY MODE
BY251G~BY255G D1 Approximate 1.05 1250 1250 12500 Tape
BY251G~BY255G C1 Approximate 1.05 250 250 12500 Bulk
■ Characteristics (Typical)
Instantaneous Forward Current (A)
Instantaneous Forward Voltage (V)
FIG.3: Forward Voltage
TJ=25℃
Pulse width=300us
1% Duty Cycle
0.01
0.6 0.8 1.0 1.2 1.4
0.1
100
1.0
10
2.01.6 1.8
0
0.6
1.2
1.8
50
1
0
0150
Single Phase
Half Wave 60HZ
Resistive or
Inductive Load
0.375''(9.5mm)
Lead Length
100
2.4
3.0
0
Average Forward Output Current (A)
Ambient Temperature (℃)
FIG.1: Io-Ta Curve
Peak Forward Surge Current (A)
Number of C
y
cles
FIG.2: Forward Surge Current Capability
8.3ms Single Half Sine Wave
JEDEC Method
1246810204060
80 100
40
80
120
160
200
0
0.001
0.01
020 40 60 80 100
0.1
1.0
10
100
FIG.4: Typical Reverse Characteristics
Percent of Rated Peak Reverse Voltage (%)
Instantaneous Reverse Current (uA)
Tj=100℃
Tj=125℃
Tj=25℃
BY251G THRU BY255G
3 / 4
Yangzhou Yangjie Electronic Technology Co., Ltd.
S-A061
Rev.2.2,30-Jan-21
www.21yangjie.com
■ Outline Dimensions
DO-201AD(DO-27)
Dim Min Max
A 8.50 9.50
B 5.00 5.60
C 25.4 /
D 1.20 1.30
Dimensions in millimeters
DO-201AD(DO-27)
BY251G THRU BY255G
4 / 4
Yangzhou Yangjie Electronic Technology Co., Ltd.
S-A061
Rev.2.2,30-Jan-21
www.21yangjie.com
Disclaimer
The information presented in this document is for reference only. Yangzhou Yangjie Electronic Technology Co., Ltd. reserves the
right to make changes without notice for the specification of the products displayed herein to improve reliability, function or design
or otherwise.
The product listed herein is designed to be used with ordinary electronic equipment or devices, and not designed to be used with
equipment or devices which require high level of reliability and the malfunction of with would directly endanger human life (such as
medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety
devices), Yangjie or anyone on its behalf, assumes no responsibility or liability for any damages resulting from such improper use
of sale.
This publication supersedes & replaces all information previously supplied. For additional information, please visit our website
http:// www.21yangjie.com , or consult your nearest Yangjie’s sales office for further assistance.
