The 559-5201-007F is a snap-in LED panel mount indicator from Dialight's 559 series, featuring a green LED with a peak wavelength of 569 nm and typical intensity of 40 mcd. This indicator operates at 10 mA forward current with a forward voltage of 2.1 VDC and supports a 50° viewing angle, making it suitable for applications requiring reliable visual feedback. The device accommodates a 0.250" (6.35 mm) mounting hole with a maximum panel thickness of 0.031" to 0.062" (0.787 to 1.57 mm), and operates across a wide temperature range from -55°C to +100°C. It is available with straight terminals for wire wrapping or 24 AWG lead wire in 6" or 14" lengths, and features a black UL94V-0 flammable housing with RoHS compliance. Common applications include fan tray assemblies, data-center infrastructure, wireless infrastructure, electronic test and measurement instruments, and communications testing equipment.