Film capacitor for motor operation. This is a general-purpose component mainly used for repair and replacement of household appliances such as electric fans. BMCBB61-P2 SH: Part number or model number CBB61 A common series of metallized polypropylene film capacitors 4µF±5%: Indicates that the capacitance (capacity) is 4 microfarads (µF) and the tolerance (error) is within ±5%. 250V. AC 50/60Hz: Indicates that the rated voltage is 250 volts alternating current (AC) and is compatible with commercial power supplies with a rated frequency of 50 Hz or 60 Hz. EN60252 DB C S3 25/70/21: EN60252: This is an international safety standard (IEC 60252, motor capacitor standard) that this capacitor meets. DB C S3: A code related to a specific operating class, durability, and environmental conditions. 25/70/21: Indicates the operating temperature range of the capacitor. It means a minimum ambient temperature of -25°C, a maximum ambient temperature of +70°C, and the duration of the humidity test (21 days). 16.11: This is likely date information for tracking, such as the manufacturing date or lot number. This capacitor is a highly safe (P2 explosion-proof type) film capacitor mainly used for starting and operating single-phase motors in electric fans, ventilation fans, water pumps, etc. If replacement is necessary, you need to find an equivalent product that meets these specifications (especially the 4µF capacitance and 250VAC withstand voltage).