The Honeywell SE3450/5450 series consists of a gallium arsenide infrared emitting diode mounted in a TO-46 metal can package. The SE3450 series features flat window cans for a wide beam angle, while the SE5450 series has glass lensed cans for a narrow beam angle. The TO-46 packages provide high power dissipation capability, making them suitable for operation in demanding industrial environments. These diodes are mechanically and spectrally matched to SD3421/5421 photodiodes, SD3443/5443/5491 phototransistors, SD3410/5410 photodarlington, and SD5600 series Schmitt triggers, enabling precise and reliable infrared detection and control systems.