News

Mitsubishi Materials Corporation ("MMC") has developed the DH53 Series high-performance lightning protection components (surge absorbers (*1)) with fast response and a high surge current capacity (see Figure 1) to prevent abnormal voltages (surges) in electronic devices that require high safety and stable operation, such as devices for xEVs and power supplies for AI servers, which have been rapidly evolving in recent years.

Up to now, MMC has been supplying surge absorbers for protection from surges in devices for xEVs (chargers and automotive OBCs (*2)) and various power supplies, and has received high acclaim. With the recent progress of global warming causing more frequent extreme weather conditions, such as increased thunderstorms, the risk of electronic devices being exposed to unexpected surges is higher. Accordingly, for electronic devices that require high safety and stable operation, there is more demand for surge absorbers with faster response and higher surge current capacity (*3) than ever before.

MMC has succeeded in developing the DH53 Series surge absorbers (three models with different DC sparkover voltages: DH53-272M, DH53-302M and DH53-362M (*4)) that maintain a high surge life while boasting fast response and a surge current capacity improved to 5,000 A, compared to conventional products with a surge current capacity of up to 3,000 A.
As overvoltage protection components, the DH53 Series contributes to a higher degree of freedom in design and stable operation of electronic devices such as chargers for xEVs and power supplies for AI servers, which increasingly require higher performance (See Table 1).

MMC Group has established "For people, society and the earth, circulating resources for a sustainable future" as Our Commitment. We will continue to supply one-of-a-kind, highly functional materials and products, and provide optimal solutions tailored to customers' needs, thereby striving to realize Our Commitment.

Table 1: Comparison of surge absorber series specifications (*5)

(*1)

Surge absorber:
URL: https://www.mmc.co.jp/adv/en/solution/surge_absober/surgeabsober04.html

(*2)

Stands for on-board chargers. An on-board charger is a device that converts AC voltage from a charging station to the DC voltage required for the battery in charging the batteries of electric and other electrified vehicles.

(*3)

Surge current capacity is the limit value that allows normal operation without malfunction or failure against an external surge. This is represented by the peak current value at which the absorber does not break down when an impulse current of a fixed waveform is applied.

(*4)

Symbols in a model number indicate the series name, DC sparkover voltage (Vs) and Vs tolerance in order from the beginning. Example) DH53-272M means DH53 Series, 272 representing Vs=27×10²=2,700 V and tolerance M=±20%.

(*5)

Specifications are those of test products and may differ from production product specifications.

(*6)

Tolerance (initial value) is ±20%.

(*7)

Response voltage is a value for reference. Lower voltages indicate faster responsiveness.

(*8)

Refers to the current value and the number of times of application at which the electrical characteristics are satisfied when an impulse current with a fixed waveform is applied.