Description
Features
Mechanical Dimensions
n DIFFUSED JUNCTION
n MEETS UL SPECIFICATION 94V-0
Electrical Characteristics @ 25
o
C.
Maximum Ratings
BY251 . . . 255 Series
Data Sheet
3.0 Amp MINIATURE
PLASTIC SILICON RECTIFIERS
Units
Volts
Volts
Volts
............................................. 3.0 ...............................................
............................................. 20 ...............................................
............................................. 100 ...............................................
............................................. 1.1 ...............................................
............................................. 20 ...............................................
............................................. 30 ...............................................
......................................... -50 to 150 ..........................................
Amps
Amps
Amps
Volts
Amps
C / W
C
BY251
BY252
BY253
BY254
BY255
200
400
600
800
1300
140
280
420
560
910
200
400
600
800
1300
Peak Repetitive Reverse Voltage...V
RRM
RMS Reverse Voltage...V
R(rms)
DC Blocking Voltage...V
DC
n LOW COST
n HIGH CURRENT CAPABILITY
Page 9-14
Average Forward Rectified Current...I
F(av)
T
A
= 50
C
(Note 3)
Repetitive Peak Forward Surge Current...I
FM
Non-Repetitive Peak Forward Surge Current...I
FSM
@ Rated Current & Temp
Forward Voltage @ 3.0A...V
F
DC Reverse Current...I
R
Typical Thermal Resistance...R
JC
(Note 2)
Operating & Storage Temperature Range...T
J
, T
STRG
BY251 . . . 255 Series
.285
.375
1.00 Min.
.050 typ.
.190
.210
JEDEC
D0-201AD
Data Sheet
3.0 Amp MINIATURE
PLASTIC SILICON RECTIFIERS
Ratings at
25 Deg. C ambient
temperature
unless otherwise
specified.
Single Phase Half
Wave, 60 HZ
Resistive or
Inductive Load.
For Capacitive
Load, Derate
Current by 20%.
Page 9-15
NOTES: 1. Measured @ 1 MHZ and applied reverse voltage of 4.0V.
2. Thermal Resistance Junction to Ambient, Jedec Method.
3. When Mounted to heat sink, from body.
BY251 . . . 255 Series
Thermal Resistance
Lead Length (mm)
o
C/Watt
Instantaneous Forward Characteristics
Forward Voltage (Volts)
Amps
Peak Forward Surge Current
Number of Cycles @ 60 Hz
Amps
Forward Current Derating Curve
Amps
T
A
= Ambient Temperature (
C)
LL = 10mm
Resistive Load
Capacitive Load
T
J
= 175
C
PW = 8.3ms
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