Siemens 48BTG3S00 Electric Overload Relay ESP200

Siemens Furnas 48BTG3S00 ESP200 Electric Overload Relay is a 25–100 A protective device in the ESP200 family, designed to monitor current levels and provide protective action when an overload condition is detected. The unit is identified by model 48BTG3S00 and is associated with cross-reference identifiers 3UB8133 and 4GW2, which help ensure correct matching with existing Siemens Furnas equipment in a panel or control scheme. As an electric overload relay, its verified specification centers on the 25–100 A ampacity range, defining the span within which it can protect circuits from excess current. This description focuses strictly on the verified facts from the provided data, avoiding extrapolation beyond the stated identifiers and ampacity. Manufactured by Siemens under the Furnas line, the ESP200 designation ties this relay to a long-standing approach to protecting electrical systems by sensing overload conditions and triggering protective responses within the specified current range. The entry-level data points—model number, ampacity range, and cross-references—provide a concise snapshot of where this relay fits within Siemens Furnas' protection-relay lineup.