Intermatic 120-240 VAC 4-Mode 50kA Surge Protective Device L5F21S1DG1

Product Overview

The Intermatic L5F21S1DG1 is a Type 2 surge protective device rated for 120–240 VAC single‑phase systems. It provides 4‑mode protection with a surge current rating of 50kA and includes EMI/RFI filtering as part of its manufacturer description.

This SKU is intended for use in service entrance, distribution panel, commercial, and residential equipment protection applications. Confirm selection and installation with a qualified electrical professional and local code requirements.

Key Features

• Voltage: 120–240 VAC (single‑phase)
• Mode: 4‑Mode surge protection
• Surge current rating: 50kA
• Type rating: Type 2
• Includes EMI/RFI filter per manufacturer description
• Manufacturer model / SKU: L5F21S1DG1
• UPC: 078275151697
• Unit weight: 0.5 lb

What this device does

The Intermatic L5F21S1DG1 provides transient voltage suppression for single‑phase electrical systems by diverting or clamping surge energy, protecting downstream equipment and wiring. The manufacturer description identifies it as a Type 2 surge protective device with integrated EMI/RFI filtering.

• Protects equipment and panels from transient overvoltages
• 4‑mode protection addresses multiple line-to-line and line-to-ground surge paths
• EMI/RFI filter reduces electromagnetic and radio-frequency interference as described by the manufacturer

Where to use it

This unit is specified for service entrance, panel, commercial and residential electrical systems, and equipment protection. It is appropriate where a Type 2 surge protective device is required by design or code for downstream protection.

• Service entrance surge protection
• Distribution and branch panel protection
• Commercial electrical systems
• Residential electrical systems
• Contractor stock and equipment protection applications

Electrical ratings and mode

Confirm the electrical parameters before selection. The L5F21S1DG1 is listed for 120–240 VAC single‑phase systems, provides 4‑mode surge protection, and has a manufacturer‑stated surge current rating of 50kA and a Type 2 classification.

• Voltage: 120–240 VAC
• Phase: 1‑phase
• Mode: 4‑Mode
• Surge current rating: 50kA
• Type rating: Type 2

Installation and selection guidance

Selection and installation must follow the authority having jurisdiction and the system design. The product data lists relevant electrical attributes, but local code, panel capacity, and coordination with upstream protection should be verified by a qualified professional prior to installation.

• Confirm model number, UPC, voltage, phase and compatibility with the electrical distribution before ordering
• Have a qualified electrician select and install the device according to local code and project requirements
• Ensure proper coordination with upstream and downstream protective devices for effective surge mitigation

Before You Order

Confirm the model number (L5F21S1DG1), UPC, voltage, phase, and that a Type 2, 4‑mode 50kA device meets your system and code requirements before ordering. Electrical products should be selected and installed by a qualified professional.

• Verify system voltage and phase compatibility (120–240 VAC, single‑phase)
• Confirm that 50kA surge current rating and Type 2 classification are appropriate for your coordination needs
• Provide model number and quantity to your supplier or contractor when requesting a quote

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Intermatic 120-240 VAC 4-Mode 50kA Surge Protective Device L5F21S1DG1. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.