The CAP CER 91PF 1KV C0G/NP0 1111 is a specific type of ceramic capacitor with the following characteristics: it has a capacitance value of 91 pF ±1 and can withstand an operating voltage of up to 1000V (1kV). It falls under the C0G or NP0 class, which denotes a particular type of temperature-compensating ceramic material. The capacitor's package dimensions are 2828 metric, which may also be referred to as 1111 in some nomenclature systems.