The Honeywell SD3410/5410 series consists of an NPN silicon photodarlington designed for use in a variety of applications requiring light detection. The SD3410 features a flat window for a wide acceptance angle, while the SD5410 utilizes a glass lensed design for a narrower acceptance angle. Encased in a TO-46 metal can package, these photodarlington devices are well-suited for operation in challenging environments and are mechanically and spectrally matched to Honeywell's SE3450/5450, SE3455/5455, and SE3470/5470 infrared emitting diodes. They offer a wide operating temperature range and various sensitivity options.