Thermal Adhesive for Power Devices in Industrial Power Supplies｜SIPC 1928 Selection Guide
ELAPLUS SIPC 1928 silicone thermal conductive adhesive sealant may be evaluated for thermal bonding and fixation of power transistors, thyristors and other heat‑generating components mounted on PCBs of industrial power supplies. Key verification targets include the component heat transfer path, mechanical positioning method, adhesive curing regime and electrical clearance. For industrial power supplies fitted with aluminium or copper heat sinks, thermal bonding adhesive can deliver auxiliary fixation and heat transfer at qualified locations, yet it shall not replace mechanical fasteners or dedicated electrical insulation structures without prior qualification. Industrial power supplies generally incorporate switching devices, rectifiers, inductors, capacitors and control PCBs. Certain power semiconductors continuously generate heat during operation, which must be dissipated to the ambient via heat sinks, metal baseplates or comparable structures. One‑component thermal silicone adhesives offer convenient processing for components requiring local retention and supplementary heat dissipation. Nevertheless, material selection depends not merely on thermal conductivity; rational adhesive placement, full cure and structural endurance against transit and operating loads must also be confirmed. 1. Why Power Components in Industrial Power Supplies Require Thermal Fixation Heat from power semiconductors inside industrial power supplies travels through the package, metallic thermal interface and heat sink. Poor interfacial contact between the component and heat dissipation hardware degrades overall thermal transfer. In selected designs, thermal bonding adhesive can locate parts, provide local retention or fill controlled gaps between devices and designated metal substrates. Components subject to high mechanical loads shall retain screws, spring clips or other robust fastening schemes. A clear distinction must be drawn between thermal structural adhesive and ordinary thermal grease. The former cures into an elastic layer with measurable bonding strength, while thermal grease functions primarily as an interface filler and cannot serve as a standalone structural fastener. If the primary thermal path of a power device relies on…
