A contactor assembly comprising: a contactor, comprising a housing; a printed wire board having through holes; and a contactor mounting system comprising: a first stationary lead, wherein the first stationary lead at least partially extends externally from the housing; a second stationary lead, wherein the second stationary lead at least partially extends externally from the housing; and pins extending from the first and second stationary leads (110, 115) and in a direction normal from a face of the respective stationary lead (110, 115), the face being parallel to the printed wire board, wherein: the pins are configured to mate with and couple to the through holes in the printed wire board; the pins are formed in an array and/or matrix; the pins are at least one of ultrasonically bonded to the respective stationary lead (110, 115) or integrally formed with the respective stationary lead (110, 115); the first and second stationary leads (110, 115) are directly coupled to the printed wired board via the pins; the contactor further comprises an internal mobile bus bar configured to move from a first position where electrical and mechanical contact with the second stationary lead is restricted to a second position where electrical and mechanical contact with the second stationary lead is made; the pins are compliant pins having angled edges to ease insertion into through holes; and the pins each comprise a generally square shaped cross-section to prevent movement of the contactor in at least three directions with respect to the printed wire board. a contactor, comprising a housing; a printed wire board having through holes; and a contactor mounting system comprising: a first stationary lead, wherein the first stationary lead at least partially extends externally from the housing; a second stationary lead, wherein the second stationary lead at least partially extends externally from the housing; and pins extending from the first and second stationary leads (110, 115) and in a direction normal from a face of the respective stationary lead (110, 115), the face being parallel to the printed wire board, wherein: a first stationary lead, wherein the first stationary lead at least partially extends externally from the housing; a second stationary lead, wherein the second stationary lead at least partially extends externally from the housing; and pins extending from the first and second stationary leads (110, 115) and in a direction normal from a face of the respective stationary lead (110, 115), the face being parallel to the printed wire board, wherein: the pins are configured to mate with and couple to the through holes in the printed wire board; the pins are formed in an array and/or matrix; the pins are at least one of ultrasonically bonded to the respective stationary lead (110, 115) or integrally formed with the respective stationary lead (110, 115); the first and second stationary leads (110, 115) are directly coupled to the printed wired board via the pins; the contactor further comprises an internal mobile bus bar configured to move from a first position where electrical and mechanical contact with the second stationary lead is restricted to a second position where electrical and mechanical contact with the second stationary lead is made; the pins are compliant pins having angled edges to ease insertion into through holes; and the pins each comprise a generally square shaped cross-section to prevent movement of the contactor in at least three directions with respect to the printed wire board.