1. What is the RIA12 Filter 300W Series used for?

The filter is installed between a railway DC supply and a DC-DC converter or other electronic load. It suppresses supply surges and transients that could otherwise damage downstream equipment. It is a protection filter and does not replace the DC-DC converter.

2. What input-voltage options are available?

Two models are available. The 48 Vdc model accepts a continuous input of 28.8–70 Vdc, while the 110 Vdc model operates from 43–154 Vdc.

3. What surge voltages can the filter withstand?

The 48 Vdc version is specified for a 182 Vdc surge, while the 110 Vdc version supports a 385 Vdc surge for 20 ms. The filter clamps the voltage supplied to downstream equipment during the applicable surge condition.

4. Is the RIA12 Filter suitable for harsh railway environments?

Yes. It uses a die-cast IP66 enclosure with integral mounting flanges and robust, keyed Deutsch connectors. It operates from −40°C to +70°C and uses free-air convection cooling without a fan.

5. Which railway standards does the filter support?

The series is designed for railway surge and transient protection in accordance with RIA12 and supports applications requiring EN 50155 and EN 50121 compliance. Compliance should be confirmed at complete-system level for the intended installation.

RIA12 Filter 300W Series

The RIA12 Filter 300W Series protects railway DC-DC converters and sensitive electronic equipment against supply surges and high-energy transients. Separate models support continuous input ranges of 28.8–70 Vdc and 43–154 Vdc, covering nominal 48 Vdc and 110 Vdc railway supplies. The filter delivers 300 W nominal continuous power, with operation up to 350 W under specified conditions, and achieves efficiency above 95%. Its die-cast IP66 enclosure, integral mounting flanges, keyed Deutsch connectors and free-air convection cooling support installation in demanding railway environments. The series also includes reverse-polarity protection and is designed to meet RIA12, EN 50155 and EN 50121 requirements.

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Category: Chassis Mount, Chassis Mount, DC-DC Converters, EMC Filters

Brands: Relec Electronics

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The RIA12 Filter 300W Series is a rugged railway surge and transient filter for 48 Vdc and 110 Vdc power systems. Installed ahead of a DC-DC converter or other electronic equipment, it provides RIA12 transient protection, reverse-polarity protection and IP66 environmental sealing.