Kingbright Tri-colour 5mm LED L-59xxC Series - Kingbright L-59EYC, A 5mm tri-colour red/yellow LED from Kingbright housed in a water clear package.
Two diodes are connected in a common cathode configuration.
By connecting both together a third colour is obtained.
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Kingbright L-59EYC 5mm Red /Yellow LED Tricolour Clear