PAGE . 1
STAD-FEB.27.2009
1
BY251 ~ BY255
FEATURES
• High current capability.
• Plastic package has Underwriters Laboratories
Flammability Classification 94V-O
• Void-free Plastic in DO-201AD package.
• Exceeds environmental standards of MIL-S-19500/228
• Low leakage .
• In compliance with EU RoHS 2002/95/EC directives
MECHANICAL DATA
• Case: Molded plastic, DO-201AD
• Terminals: Axial leads, solderable to MIL-STD-750,Method 2026
• Polarity: Color Band denotes cathode end
• Mounting Position: Any
• Weight: 0.0395 ounce, 1.122 grams
MEDIUM CURRENT PLASTIC RECTIFIER
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25°C ambient temperature unless otherwise specified.
Resistive or inductive load, 60Hz.
NOTES:
1. Measured at 1 MHz and applied reverse voltage of 4.0 volts.
2.Thermal resistance from junction to ambient.
3.Reverse Recovery Test Conditions:IF=0.5A , IR=1.0A ,Irr=0.25A
DO-201AD
Unit: inch(mm)
.052(1.3)
.210(5.3)
1.0(25.4)MIN. 1.0(25.4)MIN.
.375(9.5)
.285(7.2)
.048(1.2)
.188(4.8)
VOLTAGE 200 to 1300 V olts 3.0 Amperes
CURRENT
RETEMARAPLOBMYS152YB252YB352YB452YB552YBSTINU
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MRR
0020040060080031V
egatloVSMRmumixaMV
SMR
041082024065019V
egatloVgnikcolBCDmumixaMV
CD
0020040060080031V
)mm5.9("573.tnerruCdrawroFegarevAmumixaM htgneldael I
(F)VA
0.3A
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MSF
001A
A0.3taegatloVdrawroFmumixaMV
F
1.1V
TtatnerruCesreveRCDmumixaM
J
52=
O
C
TegatloVgnikcolBCDdetaR
J
001=
O
CI
R
0.5 0001 µA
)1etoN(ecnaticapacnoitcnuJlacipyTC
J
04Fp
)2etoN(ecnatsiseRlamrehTlacipyTR
θAJ
51
O
W/C
egnaRerutarepmeTegarotSdnanoitcnuJgnitarepOT
J
T,
GTS
051+ot55-
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C
PAGE . 2
STAD-FEB.27.2009
1
BY251 ~ BY255
FIG.1 FORWARD CURRENT DERATING CURVE
FIG.3 TYPICAL JUNCTION CAPACITANCE
AMBIENT TEMPERATURE, C
O
AVERAGE FORWARD RECTIFIED
CURRENT AMPERES
RATING AND CHARACTERISTIC CURVES
3.0
2.0
1.0
0
0 50 100 150
1.5
2.5
0.5
SINGLE PHASE HALF WAVE 60Hz
RESISTIVE OR INDUCTIVE LOAD
.375" (9.5mm) LEAD LENGTH
FIG.2 TYPICAL FORWARD CHARACTERISTICS
INSTANTANEOUS FORWARD VOLTAGE, VOLTS
INSTANTANEOUS FORWARD CURRENT,
AMPERES
100
10
10
1
?.1
REVERSE VOLTAGE, VOLTS
JUNCTION CAPACITANCE, pF
100
10
1.0
0.1
0.5 0.7 0.9 1.1 1.3 1.5 1.7
0 .01
100
Fig.4 MAXIMUM NON REPETITIVE PEAK SURGE CURRENT
NO. OF CYCLES AT 60Hz
PEAK FORWARD SURGE CURRENT,
AMPERES
100
120
80
60
40
20
0
12610 20 4060100
Fig.5-TYPICAL REVERSE CHARACTERISTIC
INSTANTANEOUS REVERSE CURRENT , A
PERCENTAGE OF PEAK REVERSE VOLTAGE,%
0.1
20 40 60 80 100 120 140
1.0
10
100
1000
T=125 C
o
J
T=100C
J
O
T=25C
J
O
