Special Order: PD5AA57=RELAY, VACUUM, SPST-NO Contact Voltage Rating: 28 – 1800 VDC Contact Arrangement: 1 Form A, SPST-NO Coil Termination Connection Type: Stud Terminals High Voltage Connection (Power): Terminals Power Switching: Yes High Voltage Relay | 28 – 1800 VDC 1 Form A, SPST-NO Stud Terminals | Part Number: PD5AA57 | Internal Number: 2-1618256-0 | TE Connectivity