Littelfuse, Inc., has introduced a compact, fast-blow 500VAC ceramic tube fuse rated at 1.6A to 12.5A. The 514 Series ceramic tube fuses are rated for interrupt currents up to 5,000A at an AC voltage of 500 volts and are ideal for high voltage AC power line protection in HVAC and industrial systems. Its sophisticated design improves reliability by reducing the effects of temperature cycling and vibration. Measuring just 6.3mm x 32mm, it allows circuit designers to free up the board space needed to protect components. The 514 Series fuses are suitable for energy efficient and high power applications in the home and building automation markets, including heating, ventilation, and air conditioning (HVAC) equipment and smart meters. Industrial market applications include uninterruptible power supplies (UPS), three-phase power supplies, and renewable energy sources. "The low current rating of the 514 series combined with high breaking capability is unique among such small size fuses," said Ben Zheng, global product manager at Littelfuse. "When used for short circuit protection of AC output or AC power for inverter circuits such as three-phase AC power supplies. The 514 Series fuses provide perfect overcurrent protection under extreme conditions." The 514 Series 500VAC Ceramic Tube Fuse offers the following key benefits: The high rated AC voltage and 5,000A rated interrupt current at 500V AC make it ideal for AC circuits in uninterruptible power supplies with AC operating voltages up to 500V and short-circuit currents up to 5,000A. Rated currents from 1.6A to 12.5A provide reliable overcurrent protection for high voltage AC circuits. The small (6.3mm x 32mm) ceramic body provides a more compact design for power conversion equipment that requires more energy efficiency. This fuse is suitable for most commercial low power supplies. The wide operating temperature range (-55°C to 125°C) ensures reliable protection in extreme temperatures and harsh environments.
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