Product Category Taxonomy

$product_cat_query = array(
	'relation' => 'AND',
	array(
		'relation' => 'OR',
		array(
			'taxonomy'         => 'product_cat',
			'terms'            => 'microcontrollers',
			'field'            => 'slug',
		),
	),
	array(
		'relation' => 'OR',
		array(
			'taxonomy'         => 'product_cat',
			'terms'            => 'microcontrollers',
			'field'            => 'slug',
		),
	),
);