WMF4P1K-F is a Type WMF polyester film/foil capacitor with axial leads designed for commercial and industrial applications requiring high reliability and moisture resistance. The capacitor features a 1.0 µF capacitance value with ±10% tolerance, rated for 250 Vdc operation, and is constructed with extended foil, non-inductive wound sections, epoxy sealed ends, and a sealed outer wrapper. It exhibits excellent performance characteristics including a dissipation factor of 0.75% maximum at 25°C and 1 kHz, insulation resistance of 30,000 MO·µF minimum, and an operating temperature range from -55°C to 125°C with full-rated voltage at 85°C. The device is ideal for applications with high peak currents and is commonly used in filtering, coupling, and energy storage circuits in industrial equipment and commercial electronics.