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:
Input to output voltage 500 volts; emitter colelctor voltage 5 volts; reverse input voltage 7 volts; continuous collector current 50ma; storage temperature minus 65 degrees centigrade, plus150 degrees centigrade; operating free air temperature range minus 55 degreescentigrade, 100 degrees centigrade; leadsolder temperature, 10 seconds max, 240degrees centigrade