The phrase "026CA" generally refers to an SMD (Surface Mount Device) marking code for a Transient Voltage Suppressor (TVS) diode used in automotive Engine Control Units (ECUs).These semiconductor components—often manufactured by companies like EIC Semiconductor or Luguang (marked as 3.0SMCJ26CA or similar)—are bidirectional TVS diodes designed to protect sensitive ECU microprocessors from high-voltage spikes, reverse polarity, and electrical surges.
Because GY0V is often a laser-etched code rather than a full manufacturer part number, it typically identifies a specific batch of automotive diodes, transistors, or voltage regulators (such as a Zenner diode) used in Engine Control Units (ECUs). These discrete semiconductors handle power regulation, switching, and signal protection.For tips on how to safely test components like the GY0V on an ECU board:
but... why not share actual photo (front and back) of the PCB so we can see what connects to it? this could narrow down search and offer clues to size of the component.
Hmm, not getting any meaningful hits on either part. As already suggested its always better to show them in-situ (not least because they often disintegrate on removal, especially if burnt/blown-up).