Filter the results in the table by unit price based on your quantity. Filter the results in the table by unit price based on your quantity. 550 VDC Capacitors are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 550 VDC Capacitors.
In a capacitive power supply the load and series resistor could theoretically keep the short-circuit current low enough for the fuse not to trip and still cause damage to the load or other parts eventually. This failure can also be avoided by the use of a low voltage varistor (or MOV) after the series capacitor.
The capacitor will charge rapidly at a rate determined by the maximum current of your power supply, the ESR of the capacitor, and any parasitic L/R, whereupon it will act as an open circuit, with no further current flow. Depending on your power supply, you might trip the overcurrent protection.
Capacitive power supplies designed for long load life require capacitors with foils and dimensions specifically designed for this application. For its capacitance stability and ruggedness, we recommend using THB film capacitors like the Würth supply applications.
INTRODUCTION A capacitive power supply is a very low-cost AC/DC converter without a transformer or switching components. With a very small parts count, these circuits can provide a DC voltage for low-power applications. In addition, because no high-speed switching is occurring, no EMI noise is generated.
In contrast to conventional designs, the capacitive power supplies are short-circuit-proof at the output. The vector diagram makes it clear: The majority of the input voltage drops out at the reactance of the capacitor with virtually no power dissipation being created in the capacitor.