BBSC/UBSC/ULSC Ultra-Broadband SMT Si Capacitors Murata BBSC/UBSC/ULSC Ultra-Broadband SMT Si Capacitors target optical communication systems (ROSA/TOSA, SONET, and all optoelectronics) as well as high-speed data systems or products. These capacitors are designed for DC blocking, coupling, and bypass grounding applications. The silicon capacitors offer low insertion loss, low reflection and high phase stability from 16kHz up to 67GHz for the UBSC, up to 40GHz for the BBSC, and up to 20GHz for the ULSC. These deep trench silicon capacitors have been developed using a semiconductor MOS process allowing high reliability and capacitance stability over voltage (0.1%/V) and temperature (60ppm/K).