Product Description
The part numbers you provided (R3G280-RR04-I7, R3G280-RR04-I1, R3G280-RR21-P3, R3G280-PR04-I1) refer to a series of railway special cooling fans designed for 200-277V AC applications. These fans are likely intended for use in railway or heavy-duty industrial environments where reliable and high-performance cooling is crucial.