Siemens 3SE03-BT3 Limit Switch

The Siemens 3SE03-BT3 Limit Switch is a rugged A1‑series position sensor designed for end‑of‑travel control of moving machine components in industrial automation, commonly installed on conveyors, machine tools, packaging lines, and automated production lines to deliver precise, repeatable switching. It features a roller top plunger actuator and a snap‑action mechanism with 2 normally open and 2 normally closed contacts, rated up to 240 VAC / 250 VDC and up to 6 A (AC‑15) or 3 A (DC‑13). With an IP65 metal enclosure, it operates from -25°C to +85°C and offers a mechanical life of up to 10 million operations and an electrical life up to 1 million, suitable for panel or surface mounting with M20 threaded cable entry. Compatible replacements include 3SE03-DT3, 3SE03-SB, and 3SE03-RB, enabling retrofit or replacement in conveyors, packaging/bottling lines, and material‑handling systems that require reliable mechanical switching.