Product News: Electrical Equipment & Systems

High-Efficiency DC/DC Converter delivers up to 2,100 W.

Press Release Summary:

High-Efficiency DC/DC Converter delivers up to 2,100 W.

Feb 24, 2014 - Accomplishing efficiencies up to 97%, MBH Series comprises 5 models which come in 9.0 x 6.5 x 1.25 in. ruggedized chassis mount package. Topology utilizes fixed switching frequency of 400 kHz, and respective operating and storage ranges of -40 to +95°C and -55 to +100°C suit COTS military and industrial applications. While 3 models offer 10–16 Vdc input range and outputs of 28 Vdc at 40, 60, and 75 A, remaining models have 23–32 Vdc input range and outputs of 12 and 13.5 Vdc at 100 A.

Original Press Release

Compact High Efficiency 2100 Watt DC/DC Converter

Press release date: Feb 11, 2014

Calex Mfg. Co., Inc. introduces the MBH Series DC/DC Converters. The MBH offers up to 2100 Watts in a low profile 9.0” x 6.5” x 1.25”H ruggedized chassis mount package. The module weighs only 3.3 lbs. making the MBH ideal for harsh shock and vibration environments in both COTS military and industrial applications. The MBH Series’ high efficiency, up to 97%, is accomplished through the use of high efficiency synchronous rectification, advanced electronic circuitry and thermal design resulting in a compact, highly robust solution backed by Calex’s Five Year Warranty. The operating temperature range for the MBH is -40 to 95ºC with storage of -55 to 100ºC.

The MBH Series consists of five models. Three of the models offer a 10 to 16VDC input range making them ideal for 12V mobile applications. The outputs are 28VDC at 40, 60 and 75 Amps. The remaining two models have a 23 to 32VDC input range with output voltages of 12 and 13.5VDC, both at 100 Amps. All models are highly regulated and no minimum load is required for any of the MBH models. The MBH topology utilizes a fixed switching frequency of 400 kHz. All models feature ON/OFF, non latching output over-voltage protection, thermal shutdown with auto restart, input reverse polarity protection, operating surge protection and short circuit protection.

The MBH is manufactured in the USA. Units are available from stock to eight weeks. Contact the factory for pricing. For more information on the MBH Series, go to or contact Calex at 800-542-3355/925-687-4411 (phone), 925-687-3333 (fax),

Calex’s corporate headquarters are located at 2401 Stanwell Drive, Concord, CA 94520 USA.