MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
Environmental tests: thermal shock, moisture resistance, low voltage humidity, life test, quality factor, temperature coefficient of capacitance, insulation resistance, working voltage, dielectric withstanding voltage, retrace, aging effects, piezoelectric effects, capacitance drift, operating temperature range, terminations sytles, terminal strength
