Monday, June 25, 2018
Publication Date: 08/1/2007
Archive >  August 2007 Issue >  New Products > 

Bel Power Intros Open-Frame DC-DC Converters
Open-frame converter.
Westborough, MA — The Bel Power division of Bel Fuse Inc. has added the SRSB-40U Series of isolated DC-DC converters to its growing line of isolated and non-isolated power DC-DC converters for high-speed networking, telecommunications, and computing applications. The 1/16 brick (1.3 x 0.9-in. footprint) parts are capable of delivering up to 40W of output power at higher voltages, or up to 18A of output current at an output of 1.2V.

The low-cost devices are designed to operate efficiently over a 4:1 input range of 18 to 75VDC, facilitating their use on boards with industry standard bus voltages of 24, 48 or 60V. Their ultra-wide input range permits the use of single power system designs which are capable of operating in an extensive array of environments. The Series is RoHS 6/6 compliant, and carries a full set of international safety approvals including UL, UL60950, and IEC/EN60950.

The open frame construction of the SRSB-40U Series, combined with its input voltage range and footprint of less than 1.2-in.{SP2}, makes it highly appropriate for use in a wide assortment of telecom, networking, wireless and industrial designs requiring tight inter-board spacing. Among the modules' most common use is on PC boards in mobile/optical switches, high capacity network routers, high-end datacom and medical systems, as well as in a variety of systems using distributed power architecture.

The new converters use fixed frequency synchronous rectification control for high efficiency, together with positive/negative remote sense, remote on/off logic, and ±10 percent output trim. Protection features include input and output over-voltage protection, over-temperature protection, current limit and short circuit protection, and under voltage lockout. The parts are available in both SMT and through-hole designs, and in seven distinct output voltages ranging from 1.2V to 12V. They are provided with either active-high or active-low on/off polarity. Modules operate over an ambient temperature range of -40 to +85°C.

For more information, contact: Bel Power Inc., 155 Flanders Road, Westborough MA, 01581 508-870-9775 fax: 508-870-9796 E-mail: Web: or

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