3.0 AMP SILICON RECTIFIERS
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Rating 25 C ambient temperature uniess otherwies specified.
Single phase half wave, 60Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
TYPE NUMBER
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
.375"(9.5mm) Lead Length at Ta=75 C
FEATURES
MECHANICAL DATA
Peak Forward Surge Current, 8.3 ms single half sine-wave
superimposed on rated load (JEDEC method)
Maximum Instantaneous Forward Voltage at 3.0A
Maximum DC Reverse Current Ta=25 C
at Rated DC Blocking Voltage Ta=100 C
Typical Junction Capacitance (Note 1)
BY251 BY252 BY253 BY254 BY255 UNITS
200 400 600 800 1300 V
200 400 600 800 1300 V
140 280 420 560 910 V
3.0
200
5.0
50
40
-65 +150
A
V
µA
µA
pF
NOTES:
1. Measured at 1MHz and applied reverse voltage of 4.0V D.C.
2. Thermal Resistance from Junction to Ambient .375" (9.5mm) lead length.
* Low forward voltage drop
* High current capability
* High reliability
* High surge current capability
* Case: Molded plastic
* Epoxy: UL 94V-0 rate flame retardant
* Lead: Axial leads, solderable per MIL-STD-202,
method 208 guranteed
* Polarity: Color band denotes cathode end
* Mounting position: Any
Weight: 1.10 grams
BY251 BY255THRU
1.0
Typical Thermal Resistance R JA (Note 2)θ30
*
VOLTAGE RANGE
200 to 1300 Volts
CURRENT
DO-27
Dimensions in inches and (millimeters)
1.0(25.4)
MIN.
1.0(25.4)
MIN.
.375(9.5)
.285(7.2)
.052(1.3)
.048(1.2)
DIA.
.220(5.6)
.197(5.0)
DIA.
A
3.0 Amperes
Operating and Storage Temperature Range T , TJ STG C
C/W
124
.1
1.0
10
100
RATING AND CHARACTERISTIC CURVES (BY251 THRU BY255)
FIG.3 - TYPICAL REVERSE
CHARACTERISTICS
REVERSE LEAKAGE CURRENT, ( A) µ
0 20 40 60 80 100 120 140
.01
Tj=100 C
Tj=25 C
0.1
1.0
.01
10
50
CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT,(A)
FORWARD VOLTAGE,(V)
Pulse Width 300us
1% Duty Cycle
.6 .7 .8 .9 1.0 1.1 1.2 1.3
3.0
Tj=25 C
FIG.2-TYPICAL FORWARD CURRENT DERATING CURVE
AVERAGE FORWARD CURRENT,(A)
0.5
1.0
1.5
2.0
2.5
3.0
Single Phase
Half Wave 60Hz
Resistive Or Inductive Load
0.375"(9.5mm) Lead Length
FIG.4-MAXIMUM NON-REPETITIVE FORWARD
SURGE CURRENT
50
0
100
150
200
250
NUMBER OF CYCLES AT 60Hz
1 10 5 50 100
Tj=25 C 8.3ms Single Half
Sine Wave
JEDEC method
FIG.5-TYPICAL JUNCTION CAPACITANCE
REVERSE VOLTAGE,(V)
JUNCTION CAPACITANCE,(pF)
140
120
100
80
60
40
20
0 .01 .05 .1 .5 1 5 10 50 100
FIG.1-TYPICAL FORWARD
0
0 20 40 60 80 100 120 140 160 180 200
AMBIENT TEMPERATURE,( C)
PEAK FORWARD SURGE CURRENT,(A)
PERCENT OF RATED PEAK REVERSE VOLTAGE,(%)
125
