What the part is and how it sits in a panel
The Omron E3NXMA412MOMS is an E3NX-MA series fibre amplifier unit with a red LED source and a PNP output, rated for 10–30 V supply and 100 mA load. Fibre amplifiers of this class are used where the sensing target is small, fast, hot, or confined — through-beam and diffuse-reflective fibre heads detect objects in tight spaces, on conveyors, or inside machines where a self-contained photoeye cannot physically fit. The amplifier handles the light source, gain, threshold and output; only the thin glass fibre sees the process.
Response time and switching
Response time is 100 us, which is comfortable for general object detection, part-in-place verification, and small-part counting but below what the E3NX-FA series of the same footprint achieves at 30 us. Switching mode is Light-ON / Dark-ON selectable on the unit, so the same amplifier covers both wiring conventions at the panel.
Mechanical envelope and environment
Housing is 10 mm wide, 33.5 mm high, 71.8 mm long — a slim block that stacks tightly on DIN rail alongside other E3NX-series amplifiers. Protection rating is IP50, so the amplifier belongs in a cabinet, not at the sensing point. Operating temperature runs from -25 °C to 55 °C; the unit ships with an integral 2 m cable for power and output.
Sourcing posture
The amplifier is recorded at a mature lifecycle stage. For installed E3NX-MA lines that are still running, the practical move is to hold a critical spare on the shelf rather than wait for a fault — a 100 us PNP amplifier in this housing is a clean drop-in when a channel fails. Quote this code against an RFQ for spares, panel build, or expansion; pricing is handled per quote and not from the spec table.