DC-DC Converters

Change a DC bus voltage without an AC stage — isolated 2U converters for station and telecom DC panels.

Utility substations and telecom rooms often carry more than one DC bus. A 110 or 220VDC station battery may need to feed 48VDC communication equipment; a 48VDC plant may need a 24VDC control circuit. A DC-DC converter does this without an AC intermediate stage, with galvanic isolation between the two buses.

The RP platform

The RP 2U converter uses dual-transistor forward switching with isolation between modules, so a fault in one module cannot pull down the others. In an N+1 configuration the remaining modules keep the load supplied and share current automatically. A 3½-digit meter option shows output voltage and current locally, and the 19-inch 2U chassis fits standard telecom and power cabinets. Full rated output is maintained from -10 to +50 deg C.

Specifying a unit

Confirm the source DC bus and its actual fluctuation range, the required output voltage and current, the isolation requirement, the number of modules for N+1 redundancy and the available cabinet height. For sites that start from AC mains see Rectifier & AC-DC Power Modules; for AC loads with battery backup see UPS Power Supply.

Available models1 series

Model	Type	Typical applications	Notes
RP Series 2U DC-DC	DC-DC switching power converter (19-inch 2U)	Power plants, substations, telecom rooms, DC panels, equipment rooms, NAS and network cabinets	Common builds include DC110-48V30A-2U and DC220-48V30A-2U; input / output pair is fixed per order

Models with links have detailed specification pages; unlisted models are also available on request. Capacity and quantity should be sized by our engineers against the actual load — never by nameplate rating alone.

DC-DC Converters — frequently asked questions

When is a DC-DC converter needed instead of a rectifier?

When the site already has a DC source — a 110 / 220VDC station battery or a 48VDC telecom plant — and equipment on another voltage must be fed from it. A rectifier needs an AC input; a DC-DC converter does not.

Which conversion pairs are supported?

Standard builds include 110VDC to 48VDC and 220VDC to 48VDC, plus 24 / 48 / 110 / 220VDC variants. The input and output pair is fixed at the factory for each order.

Is the output isolated from the input?

Yes. The dual-transistor forward topology and inter-module isolation keep the DC buses separate, which prevents fault propagation and DC insulation monitoring alarms.

Can modules be paralleled for redundancy?

Yes. Modules operate in N+1 parallel with automatic current sharing, so a failed module does not interrupt the remaining modules or the load.

Other Switching Power Supplies & Rectifiers categories

Compare the alternatives within the same product line.

Rectifier & AC-DC Power Modules

1U and 2U rack rectifiers plus embedded 48V telecom power systems, from a single 2U module to an 800A modular system, with N+1 redundancy, battery management and remote monitoring.

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