HVRM8- Low frequency high voltage diode 8KV,1.5A,50-60Hz

Construction & Key Features

• Axial leaded connection. Two through-hole leads give a firm mechanical joint and keep field replacement straightforward.
• High thermal conductivity epoxy compound molding. The body is molded in an epoxy compound chosen for heat transfer, so heat from the chip has a short path out to the surface instead of building up inside the package.
• Excellent surge current resistance. The junction is built to absorb the inrush that arrives when a rectifier charges its capacitors at switch-on, along with the line transients that reach the diode during service.
• Special high temperature resistant chip. The chip is designed for the hot end of the rated ambient range, which matters in sealed enclosures or equipment that already runs warm and has little room for extra derating.

Rectifier Applications

• Bridge rectifier stacks. Four diodes in a bridge handle single-phase 50-60 Hz rectification, and each leg sees the full reverse voltage while its partner conducts, so the blocking rating sets the working ceiling for the whole stack.
• High-voltage DC supplies. Where a line-frequency transformer secondary has to be rectified into several kilovolts of DC, these high voltage diodes sit directly in the secondary path.
• Rectifier assemblies and modules. Builders who pot or oil-fill a multi-diode assembly use this part as the repeating element across the assembly.
• Research and laboratory supplies. University and industrial research teams building one-off high-voltage sources value a documented, single-junction part they can measure and characterize themselves.

Operating Environments

Where the diode sits affects how well it holds its rating. Immersion in insulating oil is the arrangement we recommend first: the oil carries heat away from the body and suppresses the surface discharges that build around any high-voltage junction. Sealed insulating gas gives a similar result inside gas-filled enclosures. When the diode is potted or given a secondary encapsulation, the surrounding compound becomes its heat path, so dissipation and the compound's behaviour over temperature deserve attention at the design stage. In open air, or with added air cooling, a small high-voltage diode is more likely to discharge across its own surface and its heat path is only average — mount it with insulated electrodes at both ends so the field is spread and the leads are not the weakest point.

FAQ