Sustain critical workloads when power quality drops, transfers fail, or outages extend longer than expected. APC Smart-UPS On-Line delivers true double-conversion protection with 5,000 VA / 4,250 W capacity, giving infrastructure teams the headroom needed for servers, storage, and network equipment that cannot tolerate downtime. This rack/tower convertible unit fits cleanly into mixed deployment environments, whether you are standardizing on rack infrastructure or need a tower configuration at the edge. Pure sine wave output supports active PFC power supplies and other sensitive loads that demand stable electrical characteristics. The embedded network management card adds remote monitoring and control, reducing the need for local intervention when conditions change. The SRT5KXLT-5KTF is built for environments where replacement cost is only part of the equation. With scalable runtime support, maintenance-friendly lead acid batteries, and a 3-year repair-or-replace warranty excluding the battery, it is positioned for teams that value continuity, serviceability, and predictable lifecycle cost. Eight NEMA 5-20R, four NEMA L6-20R, and two NEMA L6-30R outlets provide the distribution flexibility required for mixed critical loads in one chassis.