The 203-2737-55-1102 is a 3-way Discrete Power In-line Socket with gold-plated beryllium copper contacts. This socket is glass filled polyphenylene-sulfide insulated; entry ports accept devices with 0.075-inch to 0.200-inch between leads, accept a wide variety of in-line devices up to 3 leads including TO-3 and TO-66 and must be mounted to board with screws.