SERVING GREATER PHILADELPHIA & SOUTH JERSE

Intermatic Surge Protective Device 4-Mode 120/208 Panelguard

Protect your home’s electrical system and valuable appliances with the Intermatic L5F23Y1DG1 Surge Protective Device from Intermatic. Installed directly at your electrical panel, this advanced surge protection system helps defend your home against damaging voltage spikes caused by lightning, utility grid switching, or internal electrical surges.

Whole-home surge protection helps safeguard sensitive electronics such as HVAC systems, smart thermostats, appliances, computers, and entertainment equipment from costly electrical damage.

Schedule Installation
An Intermatic Panelguard device with a blue LED indicator light on a white background.

Whole-Home Electrical Protection

Power surges can occur unexpectedly and may damage expensive home electronics and HVAC equipment. The Intermatic PanelGuard surge protector reacts instantly to redirect excess voltage away from your electrical system, helping prevent damage to connected devices.

This device is designed to protect equipment connected to distribution panels, service entrances, and sub-panels, making it a reliable solution for whole-home electrical protection.

Schedule Installation

Advanced Surge Protection Technology

Outdoor electrical panel with a transparent cover labeled 'INTERMATIC PANELGUARD' and a blue LED indicator light, mounted on a brick wall.

The system uses TPMOV surge protection technology, which includes integrated thermal disconnect protection designed to safely respond to electrical surges. This technology helps ensure reliable surge suppression while maintaining system safety.

The unit supports 4 modes of protection and offers a 50 kA surge current rating, allowing it to handle significant electrical surges before they reach sensitive equipment.

Close-up of an Intermatic PanelGuard with wires connected, mounted on a white surface.

Built for Durability and Safety

The surge protector features a NEMA 4X rated enclosure, allowing installation indoors or outdoors while protecting the device from dust, moisture, and environmental exposure.

LED indicators make it easy to monitor the system’s status. A blue LED indicates active protection, while a red LED signals that the unit requires service, helping homeowners quickly identify when maintenance is needed.

Key Features

  • Whole-home surge protection installed at the electrical panel

  • 4 modes of protection for comprehensive electrical safety

  • 50 kA surge current rating for strong surge defense

  • TPMOV surge protection technology with integrated disconnect

  • Optional audible alarm and relay contacts

  • NEMA 4X enclosure for indoor or outdoor installation

  • Blue LED protection status indicator and red service indicator

  • Optional advanced electrical noise filter (UL 1283)

A small clear plastic container with a white label and text, placed on a metal bracket attached to a brick wall next to a gray door or cabinet.

Specifications

  • Model: L5F23Y1DG1

  • Voltage: 120/208 VAC 3-Phase Wye

  • Surge Protection Type: Type 2

  • Maximum Surge Current: 50 kA per phase

  • Nominal Discharge Current: 20 kA

  • Short Circuit Current Rating: 200 kA

  • Enclosure: NEMA 4X (indoor or outdoor rated)

  • Warranty: 5-year limited warranty

Frequently asked questions

  • A whole-home surge protector like the Intermatic L5F23Y1DG1 Surge Protective Device helps protect your electrical system and connected devices from power surges caused by lightning, utility grid switching, or internal electrical spikes.

  • The device is installed directly at your home’s main electrical panel, allowing it to protect appliances, electronics, and HVAC equipment throughout the entire house.

  • Whole-home surge protection helps protect HVAC systems, refrigerators, TVs, computers, smart home devices, and other sensitive electronics from damaging voltage spikes.

  • The unit includes LED status indicators. A blue LED shows that surge protection is active, while a red indicator alerts you if the unit requires service.

  • Yes. The device features a NEMA 4X rated enclosure, which allows it to be safely installed indoors or outdoors.

  • Yes. Professional installation is recommended to ensure the surge protector is properly connected to your electrical panel and provides reliable whole-home protection.

Here for whatever you need

Whatever project you have in mind, Trade Flex has a solution. Contact us today and we’ll deliver the services you need.