CyberPower OL5KSTF

Overview

The CyberPower OL5KSTF is a step-down isolation transformer designed to convert 208V input power into a stable 120V output, delivering up to 5000 watts of capacity. It is built to support multiple devices simultaneously, making it well suited for IT environments, data centers, and setups that demand reliable power distribution. Its flexible installation options allow it to be mounted horizontally in a rack or used vertically as a tower, adapting to various space requirements.

Key features

• Converts higher voltage input (208V) to a consistent 120V output to protect sensitive equipment
• Supports both 50 Hz and 60 Hz output frequencies for broad compatibility with different devices
• Equipped with 12 NEMA 5-20R outlets, providing ample connection points without extra power strips
• Flexible installation as either a 2U rack-mounted unit or a standalone tower to fit your workspace
• Includes over-temperature protection and resettable circuit breakers on input and output to prevent damage from overloads
• Constructed with durable metal housing to withstand demanding environments and ensure long-term reliability
• Backed by a three-year warranty, offering confidence in its performance for critical power applications

Key specs

• Input voltage: 208V
• Output voltage: 120V
• Power capacity: 5000 watts
• Output frequency: 50 Hz / 60 Hz
• Outlets: 12 x NEMA 5-20R
• Form factor: 2U rack or tower
• Protection features: Over-temperature protection, resettable input and output circuit breakers
• Construction: Metal chassis

Connectivity and compatibility

This transformer is designed to integrate seamlessly with a variety of power sources such as utility lines, UPS systems, and generators that provide 208V input. The 12 NEMA 5-20R outlets accommodate a wide range of standard North American plugs, reducing the need for additional adapters or power strips. Its support for both 50 Hz and 60 Hz frequencies ensures it works well with equipment from different regions or with varying power requirements.

Installation and setup

The OL5KSTF offers versatile installation options to fit your environment. It can be mounted horizontally in a standard 2U rack space, making it ideal for data centers or server rooms where rack space is at a premium. Alternatively, it can stand vertically as a tower, which suits setups with limited rack availability or where floor space is more accessible. This flexibility helps optimize your workspace without compromising on power delivery.

Ideal uses and environments

This step-down isolation transformer is a strong choice for IT professionals, data center managers, and anyone needing stable 120V power from a 208V source. It fits well in environments where multiple devices require reliable power protection and distribution, such as server racks, network closets, and critical infrastructure setups. Its robust protection features and durable build make it suitable for continuous operation in demanding conditions.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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