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500W rated i7A non-isolated DC-DC converters

Featured Product from TDK-Lambda Americas Inc.

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TDK Corporation (TSE 6762) announces the introduction of the 500W rated i7A non-isolated DC-DC converters. Capable of operating from an input voltage of 18V to 60V, the step-down converters deliver an output voltage that can be adjusted from 3.3 to 24V with an output current of up to 33A.  The series is designed to be used in a wide range of applications including medical, communications, industrial, test, measurement and battery powered equipment. 


The i7A series utilizes the industry standard 1/16th “brick” pinout, potentially offering cost reduction and efficiency improvements over isolated converters. They can be used in conjunction with a single output 24V, 36V or 48V AC-DC power supply to generate multiple additional regulated outputs, with or without battery back-up.


Operating efficiencies are up to 98%, minimizing power losses and allowing operation in harsh ambient temperatures of -40oC to +125oC even under low airflow conditions.  With low output ripple and an excellent dynamic response, the i7A’s design reduces the number of required external components, saving both cost and board space.


The converters measure 34mm x 36.8mm and follow the industry standard 1/16th brick pin-out.  Three mechanical configurations are available - a low 11.5mm high open frame model, a baseplate construction for conduction cooling or with an integral heat sink for convection or forced air cooled environments. The i7A has an output voltage adjustment pin, positive or negative logic remote on-off, positive remote sense, plus input under-voltage, over-current and thermal protection. 


All models are certified to IEC/UL/CSA/EN 62368-1 and carry the CE mark for the Low Voltage and RoHS Directives.


More information on the i7A 33A series, including distributor inventory and evaluation boards, can be obtained from the TDK-Lambda Americas website at https://www.us.lambda.tdk.com.


Main applications

  • Medical, communications, industrial, test, measurement and battery powered equipment


Main features and benefits

  • Up to 500W in a 1/16th brick pin-out
  • Up to 98% efficient.
  • Wide 3.3 to 24V output adjustment
  • Wide 18 to 60Vdc input range
  • Low component count with minimal external components
  • Low airflow with minimal derating requirements


Key data




Input voltage range


18 to 60

Output voltage


3.3 to 24

Maximum output power





Up to 98

Safety Certifications


IEC/UL/CSA/EN 62368-1, CE Marked to the LV & RoHS Directives

Size (W x H x L)


34 x 36.8 x 11.5 (open frame model)



Open frame, baseplate or integral finned heatsink




About TDK Corporation

TDK Corporation is a world leader in electronic solutions for the smart society based in Tokyo, Japan. Built on a foundation of material sciences mastery, TDK welcomes societal transformation by resolutely remaining at the forefront of technological evolution and deliberately “Attracting Tomorrow.” It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products.

TDK's comprehensive, innovation-driven portfolio features passive components such as ceramic, aluminum electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors. In addition, TDK provides power supplies and energy devices, magnetic heads and more. These 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. In fiscal 2020, TDK posted total sales of USD 12.5 billion and employed about 107,000 people worldwide.



About TDK-Lambda Corporation

TDK-Lambda Corporation is a trusted, innovative leader and global supplier of highly reliable power conversion products for industrial and medical equipment worldwide.

TDK-Lambda Corporation is aligned for fast responses to any customer need with R&D, manufacturing, sales and service locations in five key geographic regions, namely Japan, EMEA, Americas, China and ASEAN.

For more details, please pay a visit to: www.jp.lambda.tdk.com/en/



Contact for media







Tom Tillman

TDK-Lambda Americas

(619) 575 4400