An electrical relay device comprising: a housing extending between a closed end and an open end , the housing defining a chamber ; a coil of wire within the chamber of the housing, the coil of wire electrically connected to a relay power source ; an actuator assembly within the chamber of the housing that is configured to move between a first position and a second position based on a presence or absence of a magnetic field that is induced by current through the coil of wire, the actuator assembly including a movable contact that is spaced apart from at least one stationary contact within the chamber when the actuator assembly is in the first position and engages the at least one stationary contact to provide a closed circuit path when the actuator assembly is in the second position; and a shell coupled to the housing at the open end, characterised in that : the shell seals the open end of the housing to seal the chamber, the shell having a pressure relief valve in flow communication with the chamber, the pressure relief valve being configured to open in response to a pressure within the chamber exceeding a threshold set pressure in order to reduce the pressure within the chamber; and the shell includes internal walls that sub-divide the chamber into an interior region and an exterior region that is radially exterior of the interior region, the movable contact being disposed within the interior region, the pressure relief valve being in flow communication with the exterior region. a housing extending between a closed end and an open end , the housing defining a chamber ; a coil of wire within the chamber of the housing, the coil of wire electrically connected to a relay power source ; an actuator assembly within the chamber of the housing that is configured to move between a first position and a second position based on a presence or absence of a magnetic field that is induced by current through the coil of wire, the actuator assembly including a movable contact that is spaced apart from at least one stationary contact within the chamber when the actuator assembly is in the first position and engages the at least one stationary contact to provide a closed circuit path when the actuator assembly is in the second position; and a shell coupled to the housing at the open end, characterised in that : the shell seals the open end of the housing to seal the chamber, the shell having a pressure relief valve in flow communication with the chamber, the pressure relief valve being configured to open in response to a pressure within the chamber exceeding a threshold set pressure in order to reduce the pressure within the chamber; and the shell includes internal walls that sub-divide the chamber into an interior region and an exterior region that is radially exterior of the interior region, the movable contact being disposed within the interior region, the pressure relief valve being in flow communication with the exterior region. the shell seals the open end of the housing to seal the chamber, the shell having a pressure relief valve in flow communication with the chamber, the pressure relief valve being configured to open in response to a pressure within the chamber exceeding a threshold set pressure in order to reduce the pressure within the chamber; and the shell includes internal walls that sub-divide the chamber into an interior region and an exterior region that is radially exterior of the interior region, the movable contact being disposed within the interior region, the pressure relief valve being in flow communication with the exterior region. <EOS>