BL
FEATURES
Low leakage
GALAXY ELECTRICAL
BY251(Z) - -
-
BY255(Z)
VOLTAGE RANGE: 200 --- 1300 V
CURRENT: 3.0 A
PLASTIC SILICON RECTIFIER
Low cost
Diffused junction
Low forward voltage drop
High current capability
Easily cleaned witn Freon,Alcohol,lsopropanol
and similar solvents
The plastic material carries U/L recognition 94V-0
DO - 27
MECHANICAL DATA
Case:JEDEC DO-27,molded plastic
Terminals: Axial lead ,solderable per
MIL- STD-202,Method 208
Polarity: Color band denotes cathode
Weight: 0.041 ounces, 1.15 grams
Mounting position: Any
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
ambient temperature unless otherwise specified.
Single phase,half wave,60 Hz,resistive or inductive load. For capacitive load,derate by 20%.
BY
251
Maximum recurrent peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Maximum average forw ard rectified current
9.5mm lead length,
@T
A
=75
BY
252
400
280
400
BY
253
600
420
600
3.0
BY
254
800
560
800
BY
255
1300
910
1300
UNITS
V
V
V
A
V
RRM
V
RMS
V
DC
I
F(AV)
200
140
200
Peak forw ard surge current
8.3ms single half-sine-w ave
superimposed on rated load
@T
J
=125
I
FSM
100.0
A
Maximum instantaneous forw ard voltage
@ 3.0 A
Maximum reverse current
at rated DC blocking voltage
Typical junction capacitance
Typical thermal resistance
@T
A
=25
@T
A
=100
(Note1)
(Note2)
V
F
I
R
C
J
R
θ
JA
T
J
T
STG
1.1
10.0
100.0
35
20
- 55 ---- + 150
- 55 ---- + 150
V
A
pF
/W
Operating junction temperature range
Storage temperature range
2. Thermal resistance f rom junction to ambient.
NOTE: 1. Measured at 1.0MHz and applied rev erse v oltage of 4.0V DC.
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Document Number 0260014
BL
GALAXY ELECTRICAL
1.
RATINGS AND CHARACTERISTIC CURVES
FIG.1 -- TYPICAL FORWARD CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT,
BY251(Z)- -
-BY255(Z)
FIG.2 -- TYPICAL CURRENT DERATING CURVE
10
4
2
AVERAGE FORWARD CURRENT
AMPERES
100
4
3
AMPERES
1.0
0.4
0.2
0.1
0.06
0.04
0.02
0.01
0.6
0.8
1.0
1.2
1.4
1.6
T
J
=25
P ulse W idth=3 00uS
2
1
Single Phase
Half Wave 60H
Z
Resistive or
Inductive Load
0
0
25
50
75
100
125
150
FORWARD VOLTAGE, VOLTS
AMBIENT TEMPERATURE,
FIG.3 -- MAXIMUM NON-REPETITIVE FORWARD
SURGE CURRENT
FIG.4 -- TYPICAL JUNCTION CAPACITANCE
PEAK FORWARD SURGE CURRENT
10 0
JUNCTION CAPACITANCE,pF
100
60
40
20
10
f=1MHz
T
J
=25
T
J
=125
℃
8.3ms Single Half
Sine-Wave
AMPERES
4
2
1
.1
.2
.4
1.0
2
4
10
2
0
40
1
00
0
1
2
4
8 10
20
40 60 80 100
NUMBER OF CYCLES AT 60Hz
REVERSE VOLTAGE, VOLTS
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Document Number 0260014
BL
GALAXY ELECTRICAL
2.
RATINGS AND CHARACTERISTIC CURVES
FIG.5 -- TYPICAL REVERSE CHARACTERISTICS
REVERSE LEAKAGE CURRENT, MICRO AMPERES
BY251(Z) - - - BY255(Z)
100
10
T
J
=125 C
0
1.0
T
J
=125 C
0
0.1
.01
0
20
40
60
80
100
120
140
PERCENT OF RATED PEAK REVERASE
VOLTAGE,
%
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Document Number 0260014
BL
GALAXY ELECTRICAL
3.
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