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BY251 - BY255
PRV : 200 - 1300 Volts Io : 3.0 Amperes
FEATURES :
* * * * * High current capability High surge current capability High reliability Low reverse current Low forward voltage drop
SILICON RECTIFIER DIODES
DO - 201AD
1.00 (25.4) MIN.
0.21 (5.33) 0.19 (4.83)
0.375 (9.53) 0.285 (7.24)
MECHANICAL DATA :
* Case : DO-201AD Molded plastic * Epoxy : UL94V-O rate flame retardant * Lead : Axial lead solderable per MIL-STD-202, Method 208 guaranteed * Polarity : Color band denotes cathode end * Mounting position : Any * Weight : 0.929 grams
0.052 (1.32) 0.048 (1.22)
1.00 (25.4) MIN.
Dimensions in inches and ( millimeters )
Rating at 25 C ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20%.
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
RATING Maximum Repetitive Peak Reverse Voltage Maximum RMS Voltage Maximum DC Blocking Voltage Maximum Average Forward Current 0.375"(9.5mm) Lead Length Ta = 50 C Peak Forward Surge Current 8.3ms Single half sine wave Superimposed on rated load (JEDEC Method) Maximum Forward Voltage at IF = 3.0 Amps. Maximum DC Reverse Current at rated DC Blocking Voltage Ta = 25 C Ta = 100 C
SYMBOL VRRM VRMS VDC IF
BY251 200 140 200
BY252 400 280 400
BY253 600 420 600 3.0
BY254 800 560 800
BY255 1300 910 1300
UNIT V V V A
IFSM VF IR IR(H) CJ RJA TJ TSTG
100 1.1 20 50 50 18 - 65 to + 175 - 65 to + 175
A V A A pF C/W C C
Typical Junction Capacitance (Note1) Typical Thermal Resistance (Note2) Junction Temperature Range Storage Temperature Range Notes :
(1) Measured at 1.0 MHz and applied reverse voltage of 4.0VDC (2) Thermal resistance from Junction to Ambient at 0.375" (9.5mm) Lead Lengths, P.C. Board Mounted.
Page 1 of 2
Rev. 01 : Mar 23, 2002
RATING AND CHARACTERISTIC CURVES ( BY251 - BY255 )
FIG.1 - DERATING CURVE FOR OUTPUT RECTIFIED CURRENT
3.0
FIG.2 - MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT
100
AVERAGE FORWARD OUTPUT CURRENT, AMPERES
PEAK FORWARD SURGE CURRENT, AMPERES
Ta = 25 C
80
2.4
1.8
60
1.2
40
0.6
20
NON-REPETITIVE
0 0 25 50 75 100 125 150 175 0 1 2 4 6 10 20 40 60 100
AMBIENT TEMPERATURE, ( C) FIG.3 - TYPICAL FORWARD CHARACTERISTICS JUNCTION CAPACITANCE, (pF)
NUMBER OF CYCLES AT 60Hz
FIG 4 . - TYPICAL JUNCTION CAPACITANCE
100
100 50
FORWARD CURRENT, AMPERES
TJ = 25 C
10
10 5
Pulse W idth = 300 s 2% Duty Cycle
1.0
TJ = 25 C
1
1
2
4
10
20
40
100
REVERSE VOLTAGE, VOLTS
0.1
REVERSE CURRENT, MICROAMPERES
FIG. 5 - TYPICAL REVERSE CHARACTERISTICS
10
0.01 0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
FORWARD VOLTAGE, VOLTS
Ta = 100 C
1.0
0.1
Ta = 25 C
0.01 0
20
40
60
80
100
120
140
PERCENT OF RATED REVERSE VOLTAGE, (%)
Page 2 of 2
Rev. 01 : Mar 23, 2003

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