Wells 120/240V Surge Protector for HVAC & Heat Pump — 25kA per Phase, NEMA 4X Weatherproof

The Wells 120/240V Universal Surge Protector is an outdoor-rated Type 1 SPD that defends single-phase HVAC and heat-pump systems from lightning and transient surges with 25kA per phase capacity and a 200kA SCCR.

This compact, service-entrance ready unit combines industrial-grade surge suppression with a weatherproof enclosure so you can mount it on or near exterior HVAC equipment. Listed to UL 1449 4th Edition and using advanced TFMOV/TPMOV technology, the protector is built to absorb incoming overvoltage events, report its status with a visible LED, and tolerate harsh outdoor conditions thanks to a NEMA 4X / IP66 housing.

How does this surge protector protect my HVAC or heat pump?

The Wells device limits damaging voltage spikes by diverting surge energy away from sensitive components. Its Type 1 designation and 25kA per-phase rating mean it’s suitable for service entrance or outdoor equipment installations, reducing the chance of compressor or control board failures from storm-related surges.

• 25kA surge current rating per phase to handle common surge events.
• 200kA Short-Circuit Current Rating (SCCR) for robust fault tolerance.
• UL 1449 4th Edition listed for recognized safety and performance.
• TFMOV/TPMOV suppression elements to clamp transient voltages quickly.

Is it designed to survive outdoor exposure and rough climates?

Yes — the enclosure is NEMA 4X / IP66 rated, which protects the internal electronics from rain, dust, and UV exposure. The durable housing and corrosion-resistant construction allow installation close to condensers, mini-splits, and other outdoor HVAC components without additional weatherproofing.

• NEMA 4X / IP66 enclosure for waterproof and dustproof protection.
• UV-resistant and corrosion-resistant materials for long outdoor life.
• Compact footprint for mounting beside outdoor units or service panels.

How easy is installation and monitoring?

Installation is straightforward for licensed electricians and HVAC technicians: the unit wires into the 1-phase, 3-wire system in minutes. A clear LED status indicator shows green when protection is active and turns off if the protector needs servicing or replacement, simplifying maintenance checks.

• Quick-connect wiring compatible with 120/240V single-phase systems.
• Tool-free mounting options for faster field installation.
• Front-facing LED status light for immediate visual monitoring.

Will this unit work with my specific equipment?

The Wells surge protector is engineered for a wide range of residential and light-commercial HVAC gear, including heat pumps, air conditioners, condensers, ductless mini-splits, and compressors. Verify system voltage and grounding compatibility before installation to ensure optimal protection.

• Compatible with single-phase 120/240V, 3-wire HVAC service configurations.
• Type 1 SPD suitable for service entrance or outdoor equipment connection.
• Works with heat pumps, split systems, and standalone compressors.

Who is this for: Contractors, HVAC technicians, and homeowners who need a weatherproof, high-capacity surge defense for outdoor HVAC equipment. If you want UL-listed, service-entrance-capable protection with easy status monitoring and a rugged NEMA 4X enclosure, this unit offers a balance of field-ready durability and electrical performance for protecting valuable heating and cooling assets.