AXIAL SILASTIC GUARD JUNCTION STANDARD RECTIFIER
VOLTAGE RANGE
CURRENT
200 to 1300 Volts
3.0 Ampere
BY251 THRU BY255
DO-27
FEATURES
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Low coat construction
1.0(25.4)
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
MIN.
.375(9.5)
.335(8.5)
.220(5.6)
.197(5.0)
DIA.
MECHANICAL DATA
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Case: Transfer molded plastic
1.0(25.4)
MIN.
.052(1.3)
.048(1.2)
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
DIA.
Dimensions in inches and (millimeters)
Weight: 0.042 ounce, 1.19 grams
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
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Ratings at 25OC ambient temperature unless otherwise specified
Single Phase, half wave, 60Hz, resistive or inductive load
For capacitive load derate current by 20%
SYMBOLS
UNIT
Volts
Volts
Volts
BY251
BY252
400
BY253
BY254
800
BY255
Maximum Repetitive Peak Reverse Voltage
Maximum RMS Voltage
VRRM
VRMS
VDC
200
140
200
600
420
600
1300
910
280
560
Maximum DC Blocking Voltage
400
800
1300
Maximum Average Forward Rectified Current
0.375”(9.5mm) lead length at TA= 75℃
I(AV)
3.0
Amps
Peak Forward Surge Current
8.3mS single half sine wave superimposed on
rated load (JEDEC method)
IFSM
VF
IR
125
Amps
Volts
µA
Maximum Instantaneous Forward Voltage @ 3.0A
1.1
5.0
50
TA = 25℃
TA = 100℃
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℃
IR(AV)
CJ
500
40
µA
pF
Typical Junction Capacitance (Note 1)
Typical Thermal Resistance (Note 2)
RθJA
30
℃/W
Operating Junction Temperature Range
Storage Temperature Range
Notes:
℃
℃
TJ
-55 to +150
-55 to +150
TSTG
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.
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Web Site: www.cnmic.com