The H12-1A83 is a High Voltage Reed Relay with 1A-form SPST-NO contact. This H-series relay is capable of switching up to 10kVDC and breakdown voltage of 15kVDC, panel mount and open frame with M4 screw mount. Designed with a PCB pin out for the coil. The switch contacts for direct wiring (sky wiring). Replacement for mercury wetted relay.