BY251 THRU BY255
MEDIUM CURRENT PLASTIC RECTIFIER
VOLTAGE - 200 to 1300 Volts CURRENT - 3.0 Amperes
FEATURES
l 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 TA=95
with no thermal runaway
l Exceeds 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 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 VRRM 200 400 600 800 1300 Volts
Maximum RMS Voltage VRMS 140 280 420 560 910 Volts
Maximum DC Blocking Voltage VDC 200 400 600 800 1300 Volts
Maximum Average Forward Rectified
Current .375"(9.5mm) Lead Length at
TA=95
I(AV) 3.0 Amps
Peak Forward Surge Current 8.3ms single
half sine-wave superimposed on rated load
(JEDEC method)
IFSM 100.0 Amps
Maximum Instantaneous Forward Voltage TJ=25
at 3.0A TJ=100 VF 1.1
1.0 Volts
Volts
Maximum DC Reverse Current TA=25
at Rated DC Blocking Voltage TA=100 IR 5.0
1000 A
A
Typical Junction capacitance (Note 2) TJ=25 CJ 40 PF
Typical Reverse Recovery Time (Note 3) TRR 2.5 A
Typical Thermal Resistance (Note 1) RJA 15.0 /W
Operating Junction Temperature Range TJ -50 to +150
Storage Temperature Range TSTG -50 to +150
DO-201AD
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: IF=0.5A, IR=1.0A, Irr=0.25A.
RATING AND CHARACTERISTIC CURVES BY251 THRU BY255
Fig. 1-FORWARD CURRENT DERATING CURVE Fig. 2-MAXIMUM PEAK FORWARD
SURGE CURRENT
Fig. 3-TYPICAL INSTANTANEOUS FORWARD Fig. 4-TYPICAL JUNCTION CHARACTERISTICS
CHARACTERISTICS
Fig. 5-TYPICAL REVERSE CHARACTERISTICS
