Page 1
AXIAL SILASTIC GUARD JUNCTION STANDARD RECTIFIER
BY251 THRU BY255
VOLTAGE RANGE 200 to 1300 Volts
CURRENT 3.0 Ampere
FEATURES
• Low coat construction
• Low forward voltage drop
• Low reverse leakage
• High forward surge current capability
• High temperature soldering guaranteed:
260℃/10 secods/.375”(9.5mm)lead length at 5 lbs(2.3kg) tension
MECHANICAL DATA
• Case: Transfer molded plastic
• Epoxy: UL94V-O rate flame retardant
• Polarity: Color band denotes cathode end
• Lead: Plated axial lead, solderable per MIL-STD-202E method 208C
• Mounting position: Any
• Weight: 0.042 ounce, 1.19 grams
Dimensions in inches and (millimeters)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
• Ratings at 25
• Single Phase, half wave, 60Hz, resistive or inductive load
• For capacitive load derate current by 20%
O
C ambient temperature unless otherwise specified
SYMBOLS
Maximum Repetitive Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
0.375”(9.5mm) lead length at TA= 75℃
Peak Forward Surge Current
8.3mS single half sine wave superimposed on
rated load (JEDEC method)
Maximum Instantaneous Forward Voltage @ 3.0A
Maximum DC Reverse Current at Rated
DC Blocking Voltage per element
Maximum Full Load Reverse Current, full cycle average
0.375”(9.5mm)lead length at TL=75℃
Typical Junction Capacitance (Note 1)
Typical Thermal Resistance (Note 2)
Operating Junction Temperature Range
Storage Temperature Range
TA = 25℃
TA = 100℃
Notes:
1. Measured at 1.0MHz and Applied Reverse Voltage of 4.0V DC.
2. Thermal Resistance from junction to ambient at .375”(9.5mm) lead length, P.C.board mounted.
BY251 BY252 BY253 BY254 BY255
V
200 400 600 800 1300 Volts
RRM
V
140 280 420 560 910 Volts
RMS
VDC 200 400 600 800 1300 Volts
I
3.0 Amps
(AV)
I
125 Amps
FSM
VF 1.1 Volts
IR
I
500 µA
R(AV)
5.0
50
CJ 40 pF
R
30
θJA
TJ -55 to +150
T
-55 to +150
STG
1.0(25.4)
MIN.
.375(9.5)
.335(8.5)
1.0(25.4)
MIN.
.220(5.6)
.197(5.0)
.052(1.3)
.048(1.2)
DO-27
DIA.
DIA.
UNIT
µA
℃/W
℃
℃
Web Site: www.hkmic.com
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AXIAL SILASTIC GUARD JUNCTION STANDARD RECTIFIER
BY251 THRU BY255
VOLTAGE RANGE 200 to 1300 Volts
CURRENT 3.0 Ampere
RATING AND CHRACTERISTIC CURVES BY251 Thur BY255
FIG.1-TYPICAL FORWARD CURRENT
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
25
DERATING CURVE
100
75
50
PEAK FORWARD SURGE
175
150
125
3.0
2.5
2.0
1.5
(A)
1.0
0.5
0
0
AVERAGE FORWARD CURRENT,
AMBIENT TEMPERATURE, (° C)
FIG.3-TYPICAL INSTANTANEOUS
FORWARD CHARACTERISTICS
100
10
FIG.2-MAXIMUM NON-REPETITIVE PEAK
150
125
100
75
50
CURRENT, (A)
25
0
1
FORWARD SURGE CURRENT
8.3ms Single Half Sine-Wave
(JEDEC Method) =T
5
2
10
8
NUMBER OF CYCLES AT 60 Hz
FIG.4-TYPICAL REVERSE
CHARACTERISTICS
20
10
T =100° C
j
T
jjmax
20
100
50
1
(A)(A)
0.1
0.01
0.6 0.8 1.01.2
INSTANTANEOUS FORWARD CURRENT,
INSTANTANEOUS FORWARD VOLTAGE,(V)
FIG.5-TYPICAL JUNCTION CAPACITANCE
100
10
CAPACITANCE,(pF)
TJ=25° C F=1MHz
10
0.1
REVERSE VOLTAGE,(VOLTS)
Pulse Width=300us
1% Duty Cycle
1.4
1.0
T =25° C
j
1.0
(mA)
0.1
T =25° C
INSTANTANEOUS REVERSE CURRENT,
2.01.81.6
0.01
0
40
20
j
140
60
80
120
100
PERCENT OF RATED PEAK
REVERSE VOLTAGE,(%)
10.0
4.0
100
Web Site: www.hkmic.com
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