BY251P thru BY255P
Document Number 88838
15-Sep-05
Vishay General Semiconductor
www.vishay.com
1
DO-201AD
General Purpose Plastic Rectifier
Major Ratings and Characteristics
IF(AV) 3.0 A
VRRM 200 V to 1300 V
IFSM 150 A
IR5.0 µA
VF1.1 V
Tj max. 150 °C
Features
• Low forward voltage drop
• Low leakage current, IR less than 0.1 µA
• High forward surge capability
• Solder Dip 260 °C, 40 seconds
Typical Applications
For use in general purpose rectification of power sup-
plies, inverters, converters and freewheeling diodes
application.
(Note: These devices are not Q101 qualified. There-
fore, the devices specified in this datasheet have not
been designed for use in automotive or Hi-Rel appli-
cations.)
Mechanical Data
Case: DO-201AD, molded epoxy body
Epoxy meets UL-94V-0 Flammability rating
Terminals: Matte tin plated (E3 Suffix) leads,
solderable per J-STD-002B and JESD22-B102D
Polarity: Color band denotes cathode end
Maximum Ratings
(TA = 25 °C unless otherwise noted)
Parameter Symbol BY251P BY252P BY253P BY254P BY255P Unit
Maximum repetitive peak reverse voltage VRRM 200 400 600 800 1300 V
Maximum RMS voltage VRMS 140 280 420 560 910 V
Maximum DC blocking voltage VDC 200 400 600 800 1300 V
Maximum average forward rectified current 10 mm lead length IF(AV) 3.0 A
Peak forward surge current 10 ms single half sine-wave
superimposed on rated load
IFSM 150 A
Maximum full load reverse current, full cycle average 10 mm
lead length
IR(AV) 100 µA
Operating junction and storage temperature range TJ, TSTG - 55 to + 150 °C
www.vishay.com
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Document Number 88838
15-Sep-05
BY251P thru BY255P
Vishay General Semiconductor
Electrical Characteristics
(TA = 25 °C unless otherwise noted)
Thermal Characteristics
(TA = 25 °C unless otherwise noted)
Notes:
(1) Thermal resistance from junction to ambient and from junction to lead at 0.375" (9.5 mm) lead length, P.C.B. mounted
Ratings and Characteristics Curves
(TA = 25 °C unless otherwise noted)
Parameter Test condition Symbol BY251P BY252P BY253P BY254P BY255P Unit
Maximum instantaneous
forward voltage
at 3.0 A VF 1.1 V
Maximum reverse current at
rated DC blocking voltage
TA = 25 °C IR 5.0 µA
Typical reverse recovery time IF = 0.5 A, IR = 1.0 V,
Irr = 0.25 A
trr 3.0 µs
Typical junction capacitance at 4.0 V, 1 MHz CJ 40 pF
Parameter Symbol BY251P BY252P BY253P BY254P BY255P Unit
Typical thermal resistance(1) RθJA
RθJL
20
10
°C/W
Figure 1. Forward Current Derating Curve
Average Forward Rectified Current (A)
Ambient Temperature (°C)
60 Hz
Resistive or
Inductive Load
10 mm lead length
4.0
3.0
2.0
1.0
0
0 25 50 75 100 125 150 175
Figure 2. Maximum Non-repetitive Peak Forward Surge Current
Peak Forward Surge Current (A)
Number of Cycles at 60Hz
8.3 ms Single Half Sine/Wave
TA = 55 °C
1 10 100
200
100
0
BY251P thru BY255P
Document Number 88838
15-Sep-05
Vishay General Semiconductor
www.vishay.com
3
Package outline dimensions in inches (millimeters)
Figure 3. Maximum Non-repetitive Peak Forward Surge Current
Figure 4. Typical Instantaneous Forward Characteristics
020 40 60 80100
0.01
0.1
1
10
InstantaneousReverse Leakage Current(A)
Percent of Rated Peak Reverse Voltage (%)
TJ = 125 °C
TJ = 75 °C
TJ = 25 °C
0.6 0.7 0.80.9 1.0 1.1 1.2 1.3
10
100
1
0.1
InstantaneousForward Current (A)
InstantaneousForward Voltage (V)
TJ = 25 °C
Pulse width = 300 µs
1% Duty Cycle
Figure 5. Typical Junction Capacitance
110 100
10
100
Junction Capacitance (pF)
Reverse Voltage (V)
TJ = 25 °C
f = 1.0 MHz
Vsig = 50mVp-p
0.210 (5.3)
0.190 (4.8)
Dia.
0.052 (1.32)
0.048 (1.22)
Dia.
1.0 (25.4)
Min.
0.375 (9.5)
0.285 (7.2)
1.0 (25.4)
Min.
DO-201AD
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
