[Adoption Example] HIOKI E.E. Corp. DC Hipot Tester

ROHM SiC SBDs contribute to greater miniaturization in power supply circuits

HIOKI E.E. Corp. DC Hipot Tester

Adoption Background

Hioki's DC Hipot tester is capable of performing DC withstand voltage and insulation resistance testing in compliance with a variety of safety standards. In addition to generating PASS/FAIL judgments, the instrument can display and record the applied voltage and leakage current waveforms acquired during testing. The ability to visualize and analyze testing is useful from a traceability standpoint. During product development the theme was to miniaturize the power supply block, but when trying to achieve a high voltage of 8kV using silicon SBDs, heat sinks and other thermal countermeasure components were necessary that made it difficult to reduce the size of the power supply unit. Therefore, we turned our attention on SiC SBDs, which offer high withstand voltage with minimal recovery loss.

<Customer Feedback>

Development Manager, HIOKI E.E. Corp.

Although there was competition from other manufacturers, the decisive factors that led to ROHM's selection included not only the specifications, but also the timely provision of samples when evaluation started and the fact that the products are manufactured using an integrated system from the front-end process. At first, we considered using other components such as Schottky barrier diodes, but the lower recovery loss and better heat dissipation provided by SiC allowed us to build a circuit without the need for a heat sink, reducing the number of components along with man-hours. As a result, we succeeded in reducing the size of the power supply block while increasing efficiency.

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About HIOKI E.E. Corp.

HIOKI E.E. Corp.

HIOKI E.E. Corp logo

Hioki provides electrical measurement solutions for various fields, including automotive, electronic components, environmental/new energy, and infrastructure. Electrical measurement instruments, often referred to as the mother tools of the industry, are essential in all aspects of R&D, production lines, and maintenance services. We contribute to the security and development of society by promoting the safe and effective use of energy by our customers through reliable technologies and unique innovations cultivated over our 87-year history in electrical measurement. Speedy collaboration between our headquarters in Japan (which consolidates development, production, and management functions), domestic sales branches, and 10 group sales companies across Asia, America, and Europe allows us to provide timely solutions to customers worldwide.