Powerbox announced the release of its new ruggedized 1200W AC/DC power supply for ground-based defense applications and harsh industrial environments. In metal chassis format with a baseplate for conduction cooling, the company says the OFD1200A series can be used with a baseplate operating temperature range of minus 40 up to 95 C. For highly demanding applications, Powerbox claims the OFD1200A features a conformal coating and is mechanically ruggedized according to the MIL-STD810H standard. The power supply operates with a wide universal input range from 85 to 305VAC with power factor correction (PFC). Its output voltage and current can be adjusted from near zero to the maximum allowed for each model. The OFD1200A is available in four output voltages of 12V, 28V, 48V and 65V. It can be connected in parallel up to nine units, delivering a total power level of up to 9,720W.

To cover a large range of applications, the OFD1200A operates with a wide universal input range from 85 to 305VAC (Nominal 100 to 277VAC). The unit includes a PFC with a coefficient of 0.98/0.95 (110VAC/230VAC).

The OFD1200A is available in four versions of single-output DC voltage, 12V/84A ; 28V/43A; 48V/25A and 65V/18.5A. Using a high-efficiency topology, the typical efficiency for the 48V output unit at 230VAC input is 92%.

To make it possible for customers to adjust the voltage and current to suit their application precisely, Powerbox says the OFD1200A offers two analog inputs, VTRM and ITRM. Using those functions, the output voltage and current can be adjusted from near zero up to the maximum specified per model. The output voltage can also be adjusted using the provided onboard potentiometer.

The extended trimming and control function simplifies the utilization of the power supply in constant voltage (CV) or constant current (CC) mode, without adding external circuitry.

For applications requiring redundancy or higher power, Powerbox can connect up to nine units in parallel, delivering a total power level of up to 9,720W in conduction cooling mode. Optional active ORing circuitry deploying high performance FET technology (Option-O) is available on the OFD1200A28 and OFD1200A48 to maintain the highest level of efficiency when both models are operated in parallel or in redundancy-mode.

The OFD1200A has an IN/OUT isolation of 3,000VAC and IN/FG of 2,000VAC for safety. Output isolation to FG is 500VAC. The power supply includes over current protection with auto recovery, over voltage and over temperature protection.

Powerbox claims the OFD1200A board includes easy access to auxiliary functions via onboard connectors: Remote Control, Output Voltage Sensing, Power Good, VTRM and ITRM.

In its enclosed format, the OFD1200A measures 142 x 40 x 340mm (5.59 x 1.57 x 13.38 inches) and weighs 1.8kg max.

Benefiting from a design optimized for conduction cooling, Powerbox says the OFD1200A is suitable for applications requiring a silent power solution, such as in a control room. It is also suitable for industrial applications where forced air ventilation is not possible due to environmental constraints. Attached to a chassis or cold plate, the OFD1200A can deliver “impressive power levels with a very high level of reliability.”

The OFD1200A is certified in accordance with UL62368-1 3rd edition, cUL (equivalent to CAN/CSA-C22.2 No.62368-1).

The OFD1200A series has a full three-year warranty and conforms to the European RoHS, REACH and Low Voltage Directives. The product carries the CE, UKCA and cURus markings.