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BY399 3A 800V soft recovery fast switching silicon rectifier diode
Description:
Ultrafast rectifiers are designed in order to have very low forward voltage with an ultrafast reverse recovery. This makes ultrafast rectifier diodes very efficient for secondary output rectifications in high frequency switched mode power supplies. Ultrafast rectifiers can directly reduce switching loss and improve overall power efficiency due to a good combination between reverse recovery time and forward voltage. Some features and benefits include high reverse voltage surge capability, high thermal cycling performance, low thermal resistance and very low on-state loss. Also, the soft recovery characteristic of ultrafast rectifiers minimizes power consuming oscillations.
Ultrafast Rectifiers are made for negative switching power supplies, as free wheeling diodes (such as in motor applications) and for use in inverters. They can also be found in military and other high reliability applications. Other regular applications include desktop personal computers, laptop and printer AC adaptors, DVD AC/DC power supplies, monitors, televisions and games units.
Features:
• High surge current capability
• Plastic package has Underwriters Laboratory
Flammability Classification 94V-O
• Void-free molded plastic package
• 3.0 Ampere operation at TA=55 ¢J with no thermal runaway
• Fast switching for high efficiency
• Exceeds environmental standards of MIL-S-19500/228
Maximum Ratings & Thermal Characteristics:
Rating at 25℃ ambient temperature unless otherwise specified, Resistive or Inductive load, 60 Hz.
For Capacitive load derate current by 20%.
| Parameter | Symbol | BY399 | Unit |
| Max.recurrent peak reverse voltage | VRRM | 800 | V |
| Max. RMS voltage | VRMS | 560 | V |
| Max. DC blocking voltage | VDC | 800 | V |
| Max. average forward rectified output current at TA=50℃ | IF(AV) | 3.0 | A |
| Peak forward surge current 10ms single half sine-wave superimposed on rated load | IFSM | 100 | A |
| Max.repetitive peak forward surge | IFSM | 10.0 | A |
| Max. instantaneous forward voltage at 3.0A | VF | 1.30 | V |
| Max. DC reverse current Ta=25¢J at rated DC blocking voltage Ta=100¢J | IR | 10.0 500 | £g A |
| Max. reverse recovery time TJ=25¢J | TRR | 150 | ns |
| Typical thermal resistance per element | ReJA | 22.0 | ℃/W |
| Typical junction capacitance per element | Cj | 60 | pF |
| Operating temperature range | Tj | -55 to +125 | ℃ |
| Storage temperature range | TSTG | -55 to +150 | ℃ |
NOTES:
1. Repetitive Peak Forward Surge Current at f<15HKz.
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.
4. Thermal Resistance from Junction to Ambient at .375" lead lengths with both leads to heat sink.
Dimension:
