Russian military K15Y-1 6kV 10pF 7kVar ceramic high voltage doorknob capacitor. Using in powerful radio equipment working in continuous high frequency mode in direct-current circuits.
Reactive power: 7 kVar;
Insulation resistance, min: 10000 MOhm;
Operation temperature range: -60 ... +155C;
Relative air humidity, max: 98%;
Guaranteed accrued work-time: 25000 hours.