This part is a kind of semiconductor called AQH2223.

Function of this product has AQ-H SOLID STATE RELAY.

Manufacturers : Matsushita Electric Works(Nais)

Image and pinout :

Some of the text within the PDF file :

VDE Pending (AQH1213, AQH1223, AQH2213, AQH2223) (AQH0213, AQH0223, AQH3213, AQH3223) VDE AQ-H SOLID STATE RELAY AQ-H RELAYS 5. High dielectric strength: 5,000 V AC (between input and output) 6. Two types available: Zero-cross type and Non-zero-cross type FEATURES 1. Compact DIP type SSR that’s ideal for AC load control 2. Supports 0.3 A, 0.6 A, 0.9 A and 1.2 A ON-state RMS currents. 3. The 1.2 A type saves space with a DIP 8-pin package. (Competitor only provides a 16-pin type.) 9.78 .385 6.4 .252 – 1 + 2 – 3 – 4 ZC Zero-cross circuit – 8 1 + 2 – 6 3 – 5 4 8 TYPICAL APPLICATIONS 1. Home appliances (air conditioners, microwave ovens, washing machines, personal hygiene systems, refrigerators, fan heaters, inductive heating cooker, and water heaters, etc.) 2. Industria [ ... ]

AQH2223 PDF Datasheet Download