The 559-0103-001F is a snap-in LED panel mount indicator from Dialight's 559 series, featuring a red LED with 12V integral resistor for direct connection without external components. This indicator offers a peak wavelength of 635 nm with typical intensity of 8 mcd and forward current of 13 mA, operating reliably across a temperature range of -55°C to +100°C. The device features a 0.250" (6.35 mm) mounting hole with straight terminals for wire wrapping or 24 AWG lead wire connections, housed in black UL94V-0 flammable-rated plastic. It is ideal for applications in electronic test and measurement instruments, communications testing equipment, data-center infrastructure, and hand-held devices where reliable visual indication is required.