Ditek D50-2774803Y 50kA/Phase, 25 kA Mode Surge Protector, 277/480VAC Three Phase Wye

The DITEK D50-277/4803Y is a 50kA per-phase industrial surge protective device (SPD) designed to protect 277/480VAC three-phase Wye electrical systems from damaging voltage transients. Featuring individually fused surge protection components, a 100kA short-circuit current rating, and an integrated diagnostic LED, it safeguards electrical distribution panels, disconnect switches, and connected equipment. The device supports four-wire plus ground (4W+G) configurations and provides a 320V/640V maximum continuous operating voltage (MCOV). Its NEMA 4X polycarbonate enclosure, 3/4-inch NPT connection, and UL 1449 Type 1 listing support commercial and industrial installations.

DITEK D50-277/4803Y 50kA Three-Phase Wye Industrial Surge Protector

The DITEK D50-277/4803Y Industrial Surge Protective Device protects 277/480VAC three-phase Wye electrical distribution systems against transient overvoltages caused by lightning-related disturbances, utility switching, and electrical equipment operation. Part of DITEK's D50 Series, the device incorporates individually fused surge protection components that divert transient energy away from connected electrical loads. Its 50,000-amp per-phase surge current rating supports protection of electrical panels and disconnect switches serving commercial and industrial equipment. The compact design allows installation close to the protected panel, reducing conductor length and the additional voltage caused by surge current flowing through installation wiring.

The D50-277/4803Y is designed for 277/480VAC three-phase Wye systems with four conductors plus ground (4W+G). Its maximum continuous operating voltage (MCOV) is 320V/640V, with a nominal discharge current rating of 10kA and a 100kA short-circuit current rating (SCCR). The device provides voltage protection ratings of 1,200V line-to-neutral, 2,000V line-to-ground, 1,200V neutral-to-ground, and 2,000V line-to-line. Its 50kA per-phase surge capacity and integrated overcurrent protection support repeated transient suppression within the manufacturer's operating limits. A diagnostic LED indicates the presence of system power and the operating condition of the surge protection circuitry.

The DITEK D50-277/4803Y features a NEMA Type 4X polycarbonate enclosure measuring approximately 3.8 inches long, 3.7 inches wide, and 2.62 inches high. The device weighs approximately 1.5 pounds and includes a 3/4-inch NPT male connection with 30-inch, 12 AWG wire leads for parallel connection to the protected electrical system. Its enclosure supports installation in suitable indoor and outdoor environments, with a specified operating temperature range of -31 F to 185 F (-35 C to 85 C) and maximum relative humidity of 95%, noncondensing. DITEK recommends short, direct connections to the protected electrical panel and proper grounding to minimize surge let-through voltage. The surface-mount design accommodates electrical distribution panels, commercial HVAC disconnects, and industrial power equipment.

The D50-277/4803Y is UL 1449 5th Edition listed as a Type 1 surge protective device and complies with CSA C22.2 No. 269.1-17 and RoHS requirements. Its parallel-connected configuration provides surge suppression without carrying the normal operating current of the protected electrical load. DITEK recommends a 20A single-pole or multipole circuit breaker, as appropriate for the installation. The D50 Series is intended for electrical panel protection, with the manufacturer recommending its 50kA models for panels rated up to 200A. The D50-277/4803Y is the surface-mounted 277/480V Wye configuration, while the D50-277/4803YFM provides a flush-mounted alternative. The device includes a 10-year limited manufacturer warranty and requires installation by a qualified electrical contractor in accordance with DITEK instructions and applicable electrical codes.