Narrow DIN-Rail buffer module extends hold-up time

A narrow 24V DC 20A DIN-Rail mount buffer module from TDK-Lambda, is just 49mm wide. The DBM20 is designed for providing short term hold-up or peak power for loads connected to a 24V DC output AC/DC power supply. It can supply an additional 250ms hold-up at 448W output power, or two seconds with a 2.5A load, advises TDK-Lambda. The extended hold-up time allows equipment to safely shutdown and avoid data loss during AC power interruptions. Target applications are industrial automation, robotics and semiconductor fabrication equipment.

A remote on/off function to avoid unsafe discharge of stored energy is fitted as standard, together with a DC OK relay, LED indicators and photo-coupled signals indicating fully charged and discharging modes. Multiple modules can be paralleled for longer buffer times.

Energy is stored in electrolytic capacitors, avoiding the need for servicing and maintenance of batteries. A front panel accessible switch can be used to select either fixed or variable voltage buffer levels. In fixed mode, it will provide power when the input voltage drops to 22.4V, in variable mode when the input decreases by 1V.

The DBM20 measures 49 x 123.6 x 115.4mm and operates in ambient temperatures ranging from -25 to +70 degrees C.

It carries a five-year warranty with protection against both input over-voltage and over-current conditions. In-rush current reduction and internal fuses are also provided.

Safety certification includes IEC/UL/CSA/EN 62368-1, UL 508 with CE marking to the Low Voltage, EMC and RoHS directives.

TDK was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. TDK’s portfolio features passive components such as ceramic, aluminium electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. It also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors, power supplies and energy devices and magnetic heads.

Products are marketed under the product brands TDK, Epcos, InvenSense, Micronas, Tronics and TDK-Lambda.

TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America.

TDK-Lambda supplies power conversion products for industrial and medical equipment worldwide. It has R&D, manufacturing, sales and service locations in Japan, EMEA, Americas, China and ASEAN.

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