SP240V400KA Extreme Duty Whole House Surge Protector, 400kA, Type 1 SPD, 120/240V Split-Phase

SP240V400KA — Extreme Duty 400kA Whole House Surge Protector for 120/240V Split-Phase Systems

The SP240V400KA is an extreme duty 400kA whole house surge protector built for customers who want a higher level of surge protection for demanding electrical environments. Designed for 120/240V split-phase electrical systems, this Type 1 Surge Protective Device (SPD) helps protect service panels, branch circuits, and connected equipment from damaging transient surges caused by lightning strikes, utility switching events, large load changes, and other high-energy power disturbances.

With a powerful 400kA surge current rating, the SP240V400KA is positioned as a premium solution for installations where stronger surge protection is desired. Compared to lower-capacity models, this unit offers greater surge handling capability in a larger physical package, making it a strong choice for residential, commercial, agricultural, and other critical power applications where maximum protection matters.

The SP240V400KA is ETL Listed to UL 1449 5th Edition and compliant with CSA C22.2 No. 269.1 / 269.2. It has also been tested to FCC 47 CFR Part 15: 2024 and ICES-003: 2020. For customers seeking broader preparedness against severe electrical events, this model can also be described as an EM-rated surge protector to help protect against EMP, CME, and solar flare-related surge disturbances.

Designed for whole building surge protection at the service entrance or distribution equipment, the SP240V400KA helps reduce the risk of surge damage to appliances, HVAC systems, electronics, smart home devices, pumps, well equipment, shop tools, farm systems, and other valuable electrical loads. Its Type 1 SPD design makes it well suited for applications requiring a robust first line of defense against incoming surge energy.

Electrical Specifications

• Nominal System Voltage: 120/240V AC Split-Phase

• SPD Type: Type 1

• Maximum Surge Current Rating: 400kA

• MCOV: 150V / 300V

• SCCR: 100kA

• Modes of Protection: 6 modes

• Enclosure Rating: IP67, NEMA 4X

• Flammability Rating: V0

• Frequency: 50/60 Hz

• Application: Whole house / service entrance surge protection

• System Configuration: 120/240V split-phase

• Installation Location: Service entrance, main electrical panel, or distribution equipment

Connection Information

The SP240V400KA uses a 1/2 inch straight liquid-tight conduit connector style connection.

Certifications and Compliance

• ETL Listed to UL 1449 5th Edition

• CSA C22.2 No. 269.1 / 269.2

• Tested to FCC 47 CFR Part 15: 2024

• Tested to ICES-003: 2020

Key Features

• 400kA surge current rating

• Extreme duty whole house surge protector

• Type 1 SPD for 120/240V split-phase systems

• MCOV 150V / 300V

• 100kA SCCR

• 6 modes of protection

• IP67 and NEMA 4X enclosure rating

• V0 flammability rating

• Helps protect against lightning, utility switching surges, and internal transients

• Promoted as an EM-rated surge protector for EMP, CME, and solar flare-related disturbances

• Ideal for residential, commercial, agricultural, and critical equipment applications

Applications

The SP240V400KA is well suited for:

• Residential whole house surge protection

• Service entrance surge protection

• Commercial electrical systems

• Agricultural and farm electrical systems

• Workshops and detached buildings

• HVAC and mechanical equipment protection

• Critical power and premium protection applications