Abstract:
A power resistor and method, in which the power resistor has a body (10) containing a resistive element (10a) that is on a substrate (10b). The power resistor further includes elongate leads (12) or terminals manufactured separately from the body and from the resistive element, being mechanically connected to the substrate and electrically connected to the resistive element. The leads have thermal conductivities less than about 65 watts/m DEG K (measured at 25 DEG C).
Abstract:
A fault current fusing resistor, comprising a substrate (13) on which there is a line (10) of resistive film formed of metal and glass in a conductive film, which line (10) is closely confined by containing and sealing substances (19, 22) to prevent venting of vapor from the line (10) during the fusing caused by an electrical fault condition.
Abstract:
A power resistor (46) having improved heat dissipation ability to an underlying heatsink (43) because a step or protuberance (40) is provided that cooperates with a mounting bolt or screw (54) to largely nullify the effects of molding-caused camber or curvature (42).