- 298 - REV.1 Oct.-2003
BY251 THRU BY255
3.0 A M PS. Silic o n R e c tifie rs
Voltage Range
200 to 1300 Volts
Current
3.0 Amperes
Features
a Low forward voltage drop
a High current capability
a High re lia b ility
a High s u rg e current cap a b ility
Mechanical Data
a Cases: Molded plastic
a Epoxy: UL 94V-O rate flame retardant
a Lead: Axial leads, solderable per MIL-
STD-202, Method 208 guaranteed
a Polarity: Color band denotes cathode
end
a High temperature soldering guaranteed:
260oC/10 seconds/.375”,(9.5mm) lead
lengths at 5 lbs., (2.3kg) tension
a
Weight: 1.2 grams
DO-201AD
Dimensions in inches and (millimeters)
Maximum Ratings and Electrical Characteristics
Rating at 25ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%
Type Number Symbol
BY251
BY252
BY253
BY254
BY255
Units
Maximum Recurrent Peak Reverse Voltage
VRRM 200 400 600 800 1300
V
Maximum RMS Voltage VRMS 140 280 420 560 910 V
Maximum DC Blocking Voltage VDC 200 400 600 800 1300
V
Maximum Average Forward Rectified
Current . 375 (9.5mm) Lead Length
@TA = 75 I(AV) 3.0 A
Peak Forward Surge Current, 8.3 ms Single
Half Sine-wave Superimposed on Rated
Load (JEDEC method ) IFSM 150 A
Maximum Instantaneous Forward Voltage
@ 3.0A VF 1.0 V
Maximum DC Reverse Current @ TA=25
at Rated DC Blocking Voltage @ TA=100
IR 5.0
100 uA
uA
Maximum Full Load Reverse Current, Full
Cycle Average .375”(9.5mm) Lead Length
@TL=75
HTIR
30
uA
Typical Junction Capacitance ( Note 1 ) Cj 50 pF
Typical Thermal Resistance ( Note 2 ) RJA 18 /W
Operating Temperature Range TJ -65 to +150
Storage Temperature Range TSTG -65 to +150
Notes: 1. Measured at 1 MHz and Applied Reverse Voltage of 4.0 V D.C.
2. Thermal Resistance from Junction to Ambient .375” (9.5mm) Lead Length.
- 299-
FIG.5- TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS REVERSE CURRENT.( A)
020 40 60 80 100 120 140
.01
.1
100
1.0
PERCENT OF RATED PEAK REVERSE VOLTAGE. (%)
Tj=25 C
0
Tj=100 C
0
RATINGS AND CHARACTERISTIC CURVES (BY251 THRU BY255)
FORWARD VOLTAGE. (V)
FIG.3- TYPICAL FORWARD CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT.(A)
1.81.6.6.4 .8 1.0 1.2 1.4
.01
100
30
3.0
10
1.0
.03
.1
Tj=25 C
Pulse Width=300 s
1% Duty Cycle
o
FIG.4- TYPICAL JUNCTION CAPACITANCE
JUNCTION CAPACITANCE.(pF)
100501015
1
100
50
5
10
REVERSE VOLTAGE. (V)
Tj=25 C
0
FIG.1- MAXIMUM FORWARD CURRENT
DERATING CURVE
AVERAGE FORWARD CURRENT AMPERES
250 50 75 100 125 150 175
2
3
0
1
4
AMBIENT TEMPERATURE. ( C)
o
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
0.375" (9.5mm)
Lead Length
FIG.2- MAXIMUM FORWARD SURGE
CURRENT
PEAK FORWARD SURGE CURRENT.(A)
10 50
5
1100
10
50
100
150
NUMBER OF CYCLES AT 60Hz
8.3ms Single Half
Sine Wave
JEDEC Method
NON-REPETITIVE
REPETITIVE
Tj=25 C
o
