Dual output pins for gate driving (IGBTs). Pin 11 (VREF): Provides a stable +5V reference voltage.
Search for Highway09a without quotes. If the exact match fails, look for datasheets of similar "Highway" series ICs (e.g., Highway08a, Highway10a). Highway09a Ic Datasheet Pdf
Based on the standard naming conventions for electronic components, "Highway09a" corresponds to the popular (and equivalent variants like Fotek 40DA), which is a 40A Single-Phase Solid State Relay (SSR) . Dual output pins for gate driving (IGBTs)