DITEK's D300M industrial surge protectors are designed to meet new construction bid/spec requirements for facility-wide protection. Each model provides a high surge current rating to ensure long service life, and includes service assurance features to support proactive operational management. The D300M-4803D protects 480V AC three phase delta panels. 300,000A/phase surge current rating, 150,000A/mode, ensures long service life Visual LED end of life and phase loss indicators Audible alarm with silence button Form C dry contacts for remote monitoring EMI/RFI noise filtering Replaceable SPD module.