BY251
THRU
BY255
3.0 AMPS. Silicon Rectifiers
Voltage Range
200 to 1300 Volts
Current
3.0 Amperes
Features
Low forward voltage drop
High current capability
High reliability
High surge current capability
DO-201AD
Mechanical Data
Cases: Molded plastic
Epoxy: UL 94V-O rate flame retardant
Lead: Axial leads, solderable per MIL-
STD-202, Method 208 guaranteed
Polarity: Color band denotes cathode end
High temperature soldering guaranteed:
260
o
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℃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 BY255
Units
Type Number
Maximum Recurrent Peak Reverse Voltage
200
400
600
800
1300
V
V
RRM
Maximum RMS Voltage
140
280
420
560
910
V
V
RMS
Maximum DC Blocking Voltage
200
400
600
800
1300
V
V
DC
Maximum Average Forward Rectified
Current . 375 (9.5mm) Lead Length
@T
A
= 75℃
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℃
at Rated DC Blocking Voltage @ T
A
=100℃
Maximum Full Load Reverse Current, Full
Cycle Average .375”(9.5mm) Lead Length
@T
L
=75℃
Typical Junction Capacitance
Operating Temperature Range
Storage Temperature Range
( Note 1 )
Typical Thermal Resistance ( Note 2 )
I
(AV)
I
FSM
V
F
I
R
3.0
150
1.0
5.0
100
30
40
40
-65 to +150
-65 to +150
A
A
V
uA
uA
uA
pF
℃/W
℃
℃
HTIR
Cj
R
θ
JA
T
J
T
STG
Notes: 1. Measured at 1 MHz and Applied Reverse Voltage of 4.0 V D.C.
2. Mount on Cu-Pad Size 16mm x 16mm on P.C.B.
- 520 -
YANGJIE [ YANGZHOU YANGJIE ELECTRONIC CO., LTD ]
