Quartz SMT Micro-SPDT Relays Radiall Quartz SMT Micro-SPDT Relays offer performance up to 26.5GHz, making them ideal for high frequency applications where space is limited. Radiall Quartz series offers higher frequency range, excellent reliability, hermeticity, and thermal resistance than previous SMT relays. These relays also offer a guaranteed lifespan of 3 million cycles, with the typical lifespan being 5 million cycles.