circuitry; circuit components
Technical computing/electronics term referring to the collection of components that make up an electronic circuit.
Analyze the circuitry of this board.
回路 is a general term for an electronic circuit, while 回路構成要素 specifically refers to the constituent components or circuitry as a whole.
電子部品 refers to individual electronic parts (resistors, capacitors, etc.), whereas 回路構成要素 can refer to the collective circuitry or the elements that make up a circuit.
Compound of 回路 (circuit) + 構成 (composition) + 要素 (element). A straightforward technical term.