The WKP472MCPEH0KR is a polypropylene film capacitor manufactured by Vishay. As a part of the WKP series, it's designed for applications that demand high stability, high voltage withstanding, and reliable performance under demanding conditions.

Applications

• Snubber circuits: Commonly used in power electronics to suppress voltage spikes and protect semiconductor devices such as IGBTs and MOSFETs.
• High-frequency inverters: Well-suited for high-frequency inverter applications because of their low equivalent series resistance (ESR) and equivalent series inductance (ESL).
• Power factor correction (PFC): Used in PFC circuits to enhance the power factor in various electronic devices and systems.
• Resonant circuits: Ideally suited for resonant circuits in applications like induction heating and wireless power transfer.
• Lighting ballasts: Incorporated into electronic ballasts for fluorescent and LED lighting systems.

Features

• Polypropylene film dielectric: Ensures excellent stability, low dissipation factor (tan δ), and high insulation resistance.
• Self-healing properties: Allows the capacitor to recover from minor insulation breakdowns, thus extending its operational life.
• High voltage rating: Designed to withstand high DC and AC voltages, making it ideal for high-power applications.
• Low ESR and ESL: Reduces losses and improves performance in high-frequency circuits.
• Flame-retardant epoxy resin coating: Offers improved safety and protects the capacitor from environmental effects.

Benefits

• Enhanced reliability: Self-healing properties and sturdy construction ensure long-term reliability and stable performance.
• Improved efficiency: Low ESR and ESL contribute to greater efficiency in power electronic circuits.
• Increased safety: Flame-retardant coating improves safety and reduces fire hazards.
• Reduced harmonic distortion: Effective power factor correction reduces harmonic distortion in AC power systems.
• Stable operation: The polypropylene film dielectric provides stable capacitance and low losses over a broad range of temperatures and frequencies.

Additional Details

The WKP472MCPEH0KR features a capacitance of 4700 pF (picofarads), which is 4.7 nF, with a tolerance that's typically ±10%. The voltage rating is generally quite high, around 1000VDC. The operating temperature range generally spans from -40°C to +105°C. The capacitor is made of metallized polypropylene film encapsulated in a flame-retardant epoxy resin. It's often a leaded (through-hole) component. The datasheet from Vishay provides specific details on lead spacing and dimensions. These capacitors are specifically designed for applications that require high voltage capability, high stability, and low losses.