BY251-BY255
Technical Data
Data Sheet N0552, Rev. B
GENERAL PURPOSE SILICON RECTIFIER
Reverse Voltage - 200 to 1300 Volts Forward Current - 3.0 Ampere
Features
BY251 THRU BY255
Th
e plastic package carries Underwriters Laboratory
DO-201AD
Flammability Classification 94V-0
Construction utilizes void-free molded plastic technique
Low reverse leakage
High forward surge current capability
High temperature soldering guaranteed:
250°C/10s,0.375”(9.5mm) lead length,5lbs.(2.3kg) tension
This is a Pb − Free Device
All SMC parts are traceable to the wafer lot
Additional testing can be offered upon request
Circuit Diagram
Mechanical Data
Case: DO-201AD molded plastic body
Terminals: Plated axial leads, solderable per MIL-
STD-750, Method 2026
Polarity: Color band denotes cathode end
Mounting Position: Any
Weight: 0.04 ounce, 1.10 grams
Single phase half-wave 60Hz, resistive or inductive load, for capacitive load current derate by 20%.
Characteristic
Maximum repetitive peak reverse voltage
Maximum DC blocking voltage
Maximum RMS voltage
Maximum average forward rectified current
0.375”(9.5mm) lead length at @T
A
= 75°C
Peak forward surge current 8.3ms single half sine-
wave superimposed on rated load (JEDEC Method)
Maximum instantaneous forward voltage at 3.0A
Maximum DC reverse current
At Rated DC Blocking Voltage
@T
A
= 25°C
@T
A
= 100°C
Symbol
V
RRM
V
DC
V
RMS
I
(AV)
I
FSM
V
F
I
R
C
J
R
θJA
T
J
, T
STG
BY251
200
140
BY252
400
280
Maximum Ratings and Electrical Characteristics
@T
A
=25°C unless otherwise specified
BY253
600
420
3.0
150
1.1
10.0
500
30.0
20.0
-65 to +175
BY254
800
560
BY255
1300
910
Units
V
V
A
A
V
µA
pF
°C/W
°C
Typical Junction Capacitance (Note 1)
Typical Thermal Resistance (Note 2)
Operating junction and storage temperature range
Note: 1. Measured at 1MHz and applied reverse voltage of 4.0V D.C.
2. Thermal resistance from junction to ambient at 0.375”(9.5mm)lead length, P.C.B. mounted
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BY251-BY255
Technical Data
Data Sheet N0552, Rev. B
Ratings and Characteristics Curves
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BY251-BY255
Technical Data
Data Sheet N0552, Rev. B
Mechanical Dimensions DO-201AD
SYMBOL
A
B
C
D
Millimeters
Min.
25.4
7.2
1.2
5.0
Max.
-
9.5
1.3
5.6
Inches
Min.
1.000
0.285
0.048
0.197
Max.
-
0.375
0.052
0.220
Ordering Information
Device
BY251-BY255
DO-201AD
(Pb-Free)
Marking Diagram
Shipping
1250pcs / tape
Package
For information on tape and reel specifications, including part
orientation and tape sizes, please refer to our tape and reel
packaging specification.
BY251
= Part Name
Carrier Tape Specification DO-201AD
Millimeters
Min.
9.50
50.9
-
5.60
-
-
SYMBOL
A
B
Z
T
E
IL1-L2I
Max.
10.50
53.9
1.20
6.40
0.80
1.0
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BY251-BY255
Technical Data
Data Sheet N0552, Rev. B
DISCLAIMER:
1- The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product
characteristics. Before ordering, purchasers are advised to contact the SMC - Sangdest Microelectronics (Nanjing) Co., Ltd sales
department for the latest version of the datasheet(s).
2- In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment,
medical equipment , and safety equipment) , safety should be ensured by using semiconductor devices that feature assured safety or by
means of users’ fail-safe precautions or other arrangement .
3- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any damages that may result from an accident or
any other cause during operation of the user’s units according to the datasheet(s). SMC - Sangdest Microelectronics (Nanjing) Co., Ltd
assumes no responsibility for any intellectual property claims or any other problems that may result from applications of information,
products or circuits described in the datasheets.
4- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any failure in a semiconductor device or any
secondary damage resulting from use at a value exceeding the absolute maximum rating.
5- No license is granted by the datasheet(s) under any patents or other rights of any third party or SMC - Sangdest Microelectronics
(Nanjing) Co., Ltd.
6- The datasheet(s) may not be reproduced or duplicated, in any form, in whole or part, without the expressed written permission of SMC
- Sangdest Microelectronics (Nanjing) Co., Ltd.
7- The products (technologies) described in the datasheet(s) are not to be provided to any party whose purpose in their application will
hinder maintenance of international peace and safety nor are they to be applied to that purpose by their direct purchasers or any third
party. When exporting these products (technologies), the necessary procedures are to be taken in accordance with related laws and
regulations..
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