Abstract:
A thermistor with positive resistance-to-temperature characteristic used in a overcurrent protection circuit has electrodes on mutually opposite main surfaces and is mounted to a substrate having electrically conductive members such that deterioration of its voltage resistance due to heat emission can be controlled. A spacer with smaller thermal conductivity than the substrate and penetrated by a conductor piece with a small cross-sectional area is inserted between solder materials connecting to one of the thermistor electrodes. The other electrode is contacted by an elongated connecting member through its sectional surface transverse to its longitudinal direction such that the cross-sectional area of electrical conduction is reduced.
Abstract:
The surface-mount connector includes a fixing metal member (40) for attaching a connector body to a board. The fixing metal member has a securing section (41) to be attached to the connector body and an attaching section (42) to be attached to the board. The connector body is provided with an engaging section (31A) with which the securing section is engaged such that the fixing metal member rotates about the engaging section when the connector body moves relative to the board.
Abstract:
The connector comprises a housing (7) having a soldering portion (6, 15A or 15B) and a reinforcing metal member (5) movably attached to the housing such that it is vertically movable when it is soldered to a board (12). The reinforcing metal member is provided with a groove (14) to form with the solderable portion a gap between them, which permits soldering by capillary effects.
Abstract:
An electrical connector (1/1A) for either through hole mounting or surface mounting comprises a common dielectric housing (10), a plurality of terminals (12) retained therein, and a pair of securing devices (20 or 120) mutually exclusively fixed in the housing. The securing devices are either a pair of board locks (21) or a pair of soldering pads (121). A mounting face (10b) of the housing forms two pairs of standoffs (15) at its opposite ends, and each pair of standoffs defines an opening (15a) therebetween. A retaining recess (14) is defined in the housing within each opening. The boardlocks (21) or soldering pads (121) each form a base portion (21a or 122) which engages with a retaining recess. A fork portion (21b) of each board lock engages with a retaining hole in a circuit board for through hole mounting, and a soldering portion (123) of each soldering pad engages with a mounting pad of a circuit board for surface mounting.
Abstract:
A surface mounted integrated circuit die package includes a group of peripheral leads extending laterally outwardly from the perimeter of the package and also includes an array of solder balls on the bottom of the package. The arrangement provides for a greater number of input/output connections to a die package by utilizing both peripheral leads and a ball grid array without requiring increases in package size or a reduction in the width of electrically conductive interconnections.
Abstract:
A wiring structure comprises a connector and an electromagnetic relay mounted on a printed circuit board. Connector terminals extend respectively to lead terminals of the electromagnetic relay. Through holes formed respectively through distal end portions of the connector terminals and, are aligned respectively with through holes in the printed circuit board in an overlying manner, and each of the lead terminals of the electromagnetic relay is passed through the associated mating pair of aligned through holes, and is fixed thereto by soldering.
Abstract:
A heat dissipating apparatus for a semiconductor device for use in a motor drive that improves heat dissipation efficiency by transferring heat from the semiconductor device directly to a heat sink, using ground leads or nonconnection leads of element lead pins. In addition, it is possible to connect the semiconductor device to the heat sink without extra fixing members
Abstract:
Two flat packages (110, 111) are arranged to achieve a mirrored footprint by employing guides (100), which are positioned within a mounting aperature a printed circuit board. The flat packages include leads (120, 121) which extend from an edge of the flat package. A semiconductor chip is encapsulated by the flat packages.
Abstract:
A power semiconductor device package of the invention is used for a power conversion equipment. The package is formed of a casing containing a power chip therein, external main circuit terminals for direct-current input and alternating-current output, and pin terminals for connection to an external control circuit. The main circuit terminals and pin terminals are arranged in two rows on the upper surface of the casing. In the invention, at least one of the connecting terminals for a snubber circuit and the support terminals is situated on the upper surface of the casing. The connecting terminals are connected inside the casing to the main circuit terminals for the direct-current input to have the same electric potential. The supporting terminals are arranged adjacent to the pin terminals so that a printed circuit board for the external control circuit can be securely fixed to the casing.