This is a 0.39 microfarad (uF) polyester (PET) film capacitor rated at 250 volts, with a capacitance tolerance of 5%. It features a radial lead design with a 7.5mm lead spacing, dimensions approximately 12.3mm x 5.7mm x 15.9mm, and is rated for 105°C operation. Suitable for automotive applications, packaged in an aluminum (ammo) case.