The 105MWR400K is a metallized polyester film capacitor with axial leads designed for general-purpose bypass, coupling, and blocking applications. It is rated at 400 VDC with a capacitance of 1 µF and a capacitance tolerance of ±10% at 1 kHz and 25°C. The device features a dv/dt rating of 4 V/µs, dimensions of 14.5 mm diameter by 34 mm length, and lead diameter of 0.8 mm. It operates across a temperature range of -40°C to +105°C with low ESR and small size characteristics. The capacitor exhibits an insulation resistance of 10,000 MO·µF (for capacitance >0.33 µF at >100 WVDC) and a dissipation factor of 1.00% maximum at 1 kHz for capacitance values greater than 1 µF. This device is commonly used in power supply filtering, signal coupling, and AC line applications where compact size and reliable performance are required.