This part is a kind of semiconductor called AL-R2561A.

Function of this product has 2-DIGIT DISPLAY MODULE.

Manufacturers : EASTERN TECH

Image and pinout :

Some of the text within the PDF file :

Eastern Tech, Inc. 1. Descriptions Part Number AL-R2561A/K Color Red AL-R2561A/K Digit Size 25.0×19.0×8.0 Chip_Material GaAsP/GaP 2. Absolute Maximum Ratings Parameter Power Dissipation DC Forward Current Pulse Forward Current Operating temperature Storage temperature Reverse Voltage *1 Symbol PD IF I FP Topr Tstg VR Note: *1 IFP Condions = Duty ratio 1/10, and Pulse width 0.1ms Rating 72 30 80 -20 to +60 -30 to +80 5 (Ta=25 ) Unit V 3. Electro/Optical Characteristics Parameter Forward Voltage Peak Wavelength Dominant Wavelength Spectral Radiation Bandwidth Reverse Current Luminous Intensity Symbol Condition V F IF=20mA λ IF=20mA λ D IF=20mA ∆λ IF=20mA I R VR=5V Iv IF=20mA Min 630 0.4 Value Typ 2.0 700 35 10 Max 2.4 638 (Ta=25 ) Unit V nm nm nm mcd Eastern Tech, [ ... ]

AL-R2561A PDF Datasheet Download