The Honeywell SD1440 is an NPN silicon phototransistor housed in a glass-lensed metal can coaxial package. This phototransistor is designed for applications requiring a compact size, wide sensitivity ranges, and compatibility with infrared emitting diodes like the SE1450 and SE1470. Its flexible leads allow for versatile mounting configurations. The SD1440 is suitable for light detection and sensing applications across a broad temperature range, making it ideal for industrial automation, consumer electronics, and other demanding environments.