The KR1168EN15AT chips are a voltage regulator with a fixed negative output voltage of -15V. They are protected against overloads, overvoltages and overheating. KR1168EN15AT: Output voltage: -15 ± 0,3 V; Output current: 0.1 A; Input voltage: 30 V; Operating temperature range: -10 ... + 70 ° С.