BY251 THRU BY255
GENERAL PURPOSE PLASTIC RECTIFIER
Reverse Voltage -
200 to 1300 Volts
Forward Current -
3.0 Amperes
Features
Low cost
Diffused junction
High current capability
The plastic material carries U/L recognition 94V-0
Terminals: Axial leads
Polarity: Color band denotes cathode
Mounting Instruction
Min. distance from body to soldering point, 4mm
Max. solder temperature, 350
Max. soldering time: 3.5 Sec.
Do not bend lead at a point closer than 3mm to the body
DIM ENSIONS
DIM
A
B
C
D
inches
Min.
0.283
0.189
0.048
1.000
Max.
0.374
0.208
0.051
-
Min.
7.20
4.80
1.20
25.40
mm
Max.
9.50
5.30
1.30
-
Note
Maximum Ratings and Electrical Characteristics
Symbols
BY251
BY252
BY253
BY254
BY255
Units
Peak repetitive reverse voltage
Forward current at T
amb
=50
8.3mS peak forward surge current
Recurrent peak forward current
Maximum forward voltage drop at I
F
=3.0A
Maximum reverse current at V
RRM
Maximum thermal resistance (I=10mm)
Operating and storage temperature range
V
RRM
I
(AV)
I
FSM
I
FRM
V
F
I
R
R
JA
200
400
600
3.0
100.0
20.0
1.1
10.0
30.0
-65 to +150
800
1300
Volts
Amps
Amps
Amps
Volts
A
/W
T
J
, T
STG
1
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