The 550-5505F is a RoHS-compliant 5mm bi-color LED designed for thru-hole mounting with a square back configuration. This LED supports both single-color and bi-color operation, with options for red/green or yellow/green color combinations, featuring a PBT housing and lead-free soldering compatibility up to 260°C for 5 seconds. The device is housed in a standard 5mm LED package with specified lead dimensions measured at the housing exit, and includes a cathode identification mark for proper polarity orientation. It is suitable for indicator applications, status displays, and visual signaling systems where compact size and dual-color capability are required, with RoHS compliance ensuring environmental safety and regulatory compliance.