Black Box SP365A-R2

Overview

The Black Box SP365A-R2 is a data surge protector designed specifically for RJ-11 telephone lines, providing essential protection against voltage spikes for communication devices. It features a 240 volt clamping circuit and can handle surges up to 75 amps, making it a reliable choice to protect fax machines, telephones, dial-up modems, and point-of-sale terminals from unexpected electrical damage. Its low shunt capacitance ensures that voice calls remain clear and data connections maintain their speed without interference.

Key features

• 240 volt clamping voltage that quickly limits damaging electrical spikes to protect connected devices
• Surge handling capacity of up to 75 amps to absorb high-energy surges from lightning or power irregularities
• RJ-11 interface with four-wire pass-through design for easy installation without re-terminating cables
• Low shunt capacitance that preserves the clarity of voice calls and the integrity of data transmissions
• Compatible with a variety of devices including fax machines, telephones, dial-up modems, and POS terminals
• Compact housing that fits discreetly behind desks or inside wiring closets to minimize clutter
• CE approval ensuring compliance with recognized safety standards for peace of mind in professional and home environments

Key specs

• Clamping voltage: 240 volts
• Surge current rating: 75 amps
• Interface type: RJ-11 with four-wire pass-through
• Shunt capacitance: low (exact value not specified)
• Approval: CE certified

Connectivity and compatibility

This surge protector supports four-wire RJ-11 telephone lines, making it suitable for both single-line and multi-line telephone systems. Its pass-through design shields the two active signal conductors while allowing easy connection to existing wiring without modification. This makes it a practical solution for offices, retail stores, call centers, and home workspaces that rely on uninterrupted phone or modem service.

Installation and setup

Installation is straightforward and requires no special tools or rewiring. Simply connect the cable from the wall jack to the protector’s female RJ-11 port, then attach your device to the male lead. The compact form factor allows it to be placed conveniently behind desks or inside wiring closets without taking up much space or creating clutter.

Ideal uses and environments

The SP365A-R2 is well suited to environments where telephone and modem lines are critical, such as small offices, retail counters, call centers, and home offices. It protects communication equipment from power surges that could cause downtime or damage, ensuring reliable operation in areas prone to electrical disturbances or lightning strikes.

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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