BY251 THRU BY255
MEDIUM CURRENT PLASTIC RECTIFIER
VOLTAGE - 200 to 1300 Volts CURRENT - 3.0 Amperes
FEATURES
l
Exce High surge current capability
l
Plastic package has Underwriters Laboratory
Flammability Classification 94V-O
l
Low leakage
l
Void-free molded in DO-201AD plastic package
l
High current operation of 3 Amperes at T
A
=95
J
with no thermal runaway
l
eds environmental standards of MIL-S-19500/228
MECHANICAL DATA
Case: JEDEC DO-201AD Molded plastic
Terminals: Plated axial leads, solderable per MIL-STD-750,
Method 2026
Polarity: Color band denotes cathode
Mounting Position: Any
Weight: 0.04 ounce, 1.1 gram
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
J
ambient temperature unless otherwise specified.
60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
SYMBOLS
BY251
BY252
BY253
BY254
BY255
UNITS
Maximum Recurrent Peak Reverse Voltage
V
RRM
200
400
600
800
1300
Volts
Maximum RMS Voltage
V
RMS
140
280
420
560
910
Volts
Maximum DC Blocking Voltage
V
DC
200
400
600
800
1300
Volts
Maximum Average Forward Rectified
Current .375"(9.5mm) Lead Length at
T
A
=95
J
I
(AV)
3.0
Amps
Peak Forward Surge Current 8.3ms single
half sine-wave superimposed on rated load
(JEDEC method)
I
FSM
100.0
Amps
Maximum Instantaneous Forward Voltage T
J
=25
J
at 3.0A T
J
=100
J
V
F
1.1
1.0
Volts
Volts
Maximum DC Reverse Current T
A
=25
J
at Rated DC Blocking Voltage T
A
=100
J
I
R
5.0
1000
g
A
g
A
Typical Junction capacitance (Note 2) T
J
=25
J
C
J
40
P
F
Typical Reverse Recovery Time (Note 3)
T
RR
2.5
g
A
Typical Thermal Resistance (Note 1)
R
K
JA
15.0
J
/W
Operating Junction Temperature Range
T
J
-50 to +150
J
Storage Temperature Range
T
STG
-50 to +150
J
NOTES:
1. Thermal Resistance From Junction to applied at Ambient 0.375"(9.5mm) lead length P.C.Board mounted.
2. Measured at 1 MHz and applied reverse voltage of 4.0 volts.
3. Reverse Recovery Test Conditions: I
F
=0.5A, I
R
=1.0A, Irr=0.25A.
DO-201AD
RATING AND CHARACTERISTIC CURVES
BY251 THRU BY255
8
7
6
5
4
3
2
1
0
40 60 80
100
120 140 160
180
TJ = BOTH LEADS TO
HEAT SINK WITH
LENGTHS (f) AS
SHOWN
1=.25"(6.3min)
1=.50"(12.7min)
1=.301"(.79min)
TA=AMBIENT TEMPERATURE
0.375(9.5mm) LEAD
P.C.BOARD MOUNTING
RESISTIVE OR INDUCTIVE
LOAD
TEMPERATURE,
J
200
100
50
10
1 5 10 50 100
8.3ms Single Half Since-Wave
JEDEC Method
MON-REPETITIVE
TJ=150
J
REPETITIVE
AMBIENT TEMPERATURE,
J
Fig. 1-FORWARD CURRENT DERATING CURVE
Fig. 2-MAXIMUM PEAK FORWARD SURGE CURRENT
100
50
10
1
1 5 10 50 100
TJ = 25
J
f = 1MHz
Visg = 50m Vp-p
REVERSE VOLTAGE, VOLTS
Fig. 4-TYPICAL JUNCTION CAPACITANCE
100
30
10
3.0
1.0
0.3
0.1
.03
.01
0.6 0.8
1.0 1.2 1.4
1.6 1.8 2.0
Tj = 25
J
Pulse Width = 300
g
s
2% Duty Cycle
INSTANTANEOUS FORWARD VOLTAGE, VOLTS
Fig. 3-TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
10
1.0
0.1
.01
0
20
40
60 80 100
120
140
TA = 100
J
TA = 25
J
PERCENT OF RATED PAK REVERSE VOLTAGE, %
Fig. 5-TYPICAL REVERSE CHARACTERISTICS
A
V
E
R
A
G
E
F
O
R
W
A
R
D
C
U
R
R
E
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M
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E
R
E
S
P
E
A
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R
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U
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R
E
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,
A
M
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R
E
S
I
N
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T
A
N
T
A
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O
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