Designed for life safety standards, Ditek® AC POWER SURGE PROTECTORS are compact, parallel-mount units, widely used to protect fire alarm panels and other dedicated branch circuit loads. Their small footprint also enables installation in a variety of locations. Features include diagnostic LEDs that indicate, ground presence, system power, and SPD function. NEMA 4X weatherproof enclosures are standard too. Approved for 20 A circuit breakers and complies with ANSI/IEEE C62.41 and C62.45 Category B standards. UL 1449 and RoHS compliant. DTK120SRD includes dry contacts for remote monitoring/notification.