4334222 *** Saugiklis M2UQ U-N/400A/690V ULTRA QUICK, ltra-fast fuses for semiconductor protection are the optimal protection of power electronic devices such as diodes, thyristors, triacs and others, both AC and DC, frequency converters, rectifiers, inverters, etc. UltraQuick fuses meet the requirements of the following standards: PN-IEC 60269 and VDE 0636