Data Sheet
3.0 Amp MINIATURE
PLASTIC SILICON RECTIFIERS
Mechanical Dimensions
JEDEC
D0-201AD
.190
.210
.285
.375
1.00 Min.
BY251 . . . 255 Series
Description
.050 typ.
Features
n
LOW COST
n
HIGH CURRENT CAPABILITY
n
DIFFUSED JUNCTION
n
MEETS UL SPECIFICATION 94V-0
Electrical Characteristics @ 25
o
C.
Maximum Ratings
Peak Repetitive Reverse Voltage...V
RRM
RMS Reverse Voltage...V
R(rms)
DC Blocking Voltage...V
DC
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
θJC
(Note 2)
Operating & Storage Temperature Range...T
J
, T
STRG
BY251 . . . 255 Series
BY251
200
140
200
BY252
400
280
400
BY253
600
420
600
BY254
800
560
800
BY255
1300
910
1300
Units
Volts
Volts
Volts
Amps
............................................. 3.0 ...............................................
............................................. 20 ...............................................
............................................. 100 ...............................................
Amps
Amps
............................................. 1.1 ...............................................
............................................. 20 ...............................................
............................................. 30 ...............................................
......................................... -50 to 150 ..........................................
Volts
µAmps
°C
/ W
°C
Page 9-14
Data Sheet
3.0 Amp MINIATURE
PLASTIC SILICON RECTIFIERS
Thermal Resistance
Instantaneous Forward Characteristics
Lead Length (mm)
Forward Voltage (Volts)
Peak Forward Surge Current
Forward Current Derating Curve
Amps
Amps
T
J
= 175°C
°
PW = 8.3ms
LL = 10mm
Resistive Load
Capacitive Load
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%.
Number of Cycles @ 60 Hz
T
A
= Ambient Temperature (°C)
°
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.
Page 9-15
BY251 . . . 255 Series
C/Watt
Amps
o
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