IN Brief:
- Vishay has introduced 5A, 8A, 10A, and 12A standard-recovery rectifier families in its DFN6546A package.
- Each current class is offered at 200V, 400V, and 600V, with AEC-Q101-qualified automotive ordering options.
- The 6.5 × 4.6mm package is typically 0.88mm high and uses wettable flanks to support automated optical inspection.
Vishay Intertechnology has expanded its Power DFN diode portfolio with four families of surface-mount standard rectifiers rated from 5A to 12A, combining 200V, 400V, and 600V reverse-voltage options with a DFN6546A package measuring 6.5 × 4.6mm and typically 0.88mm high.
The SE50N6x, SE80N6x, SE100N6x, and SE120N6x series provide average forward-current ratings of 5A, 8A, 10A, and 12A respectively. Each current class is available at the three reverse-voltage ratings, giving designers a common mechanical footprint across several power-line polarity and rail-protection requirements.
AEC-Q101-qualified ordering options are available alongside commercial versions, extending the same package family into automotive electronics as well as industrial and general power-conversion equipment. Vishay specifies a maximum junction temperature of 175°C, while the devices meet moisture-sensitivity level 1 under J-STD-020.
The package is central to the development. DFN6546A uses side-wettable flanks that create visible solder fillets after reflow, allowing joints to be examined with automated optical inspection. That can simplify high-volume manufacturing compared with bottom-terminated packages where the critical solder interface is hidden beneath the component and may require X-ray inspection.
Vishay says the internal construction allows larger die and increased copper content compared with conventional alternatives in a similar footprint. The company claims a 10% lower package profile, 20% higher current capability, and up to 82% greater forward-surge capability than comparable devices in the TO-277A or SMPC class. Those comparisons are manufacturer figures and depend on the specific competing package and test conditions.
Peak surge capability rises with current rating. The 5A and 8A families are specified for 240A forward surge current, while the 10A and 12A devices increase the short-duration capability further. Surge performance matters in polarity protection and supply-line applications because capacitor charging, switching events, or fault conditions can expose a diode to currents far above its steady-state operating level.
The 5A devices illustrate the electrical trade-off. Vishay specifies 0.77V forward voltage at the stated current and temperature condition, typical reverse current below 0.1µA, and repetitive peak reverse-voltage options of 200V, 400V, or 600V. Higher-current members preserve the same voltage range while using larger die to carry more average and surge current.
These are standard-recovery rectifiers rather than ultrafast or Schottky devices. That places them in applications where blocking voltage, conduction current, surge capability, package size, and cost are more important than minimising reverse-recovery charge at high switching frequency. The correct diode therefore depends on the switching environment as much as its current rating.
Vishay already uses the DFN6546A format for other diode technologies. Extending it into standard rectifiers gives designers a common low-profile mechanical platform across devices with different recovery and forward-voltage characteristics, potentially reducing board-layout changes where related products need different rectifier behaviour.
The 200V to 600V range also moves the family well beyond low-voltage supply rails. Industrial controls, auxiliary power supplies, motor-drive circuits, charging equipment, automotive systems, and general protection functions can require high blocking voltage while still carrying only single- or low-double-digit average current.
At 10A or 12A, thermal design remains decisive. A package current rating does not mean that current is available continuously on an arbitrary PCB. Forward voltage, copper area, board temperature, airflow, duty cycle, and the junction-to-board heat path determine how much current can be used in a real assembly without exceeding the device temperature limit.
That is the recurring compromise in compact power electronics. Reducing semiconductor height and footprint releases board volume, while the surrounding design is often expected to handle greater current density. A larger die and additional copper within the package can delay that thermal limit, but heat still has to leave the component through the PCB and surrounding structure.
Wettable flanks also have a practical production value beyond inspection convenience. Automotive and high-reliability manufacturers increasingly use AOI as part of automated assembly control, and a package whose solder termination can be inspected optically can fit more readily into an established process than one requiring an additional inspection method solely for hidden joints.
Vishay says samples and production quantities are available now, with quoted lead times of eight weeks. The series therefore moves directly into component selection rather than beginning with an extended sampling programme, offering designers another standard-recovery option where package height, surge capability, inspectable solder joints, and blocking voltage carry as much weight as average current.