Mersen STLC240S025 Type 1 Spd 240/120V 25ka Panel Mount

Product Description

The MERSEN STLC240S025 is a Type 1 surge protective device (SPD) from the Surge-Trap STLC series, designed to protect residential electrical panels from transient voltage events. Rated for 240/120V at 50/60Hz with a 25kA surge current rating, this device installs directly into a load center using a snap-in mounting configuration. It includes LED indication so technicians can confirm operational status at a glance. Built with TPMOV technology, it delivers a layer of safety and reliability appropriate for whole-home surge protection in residential service entrance applications.

The STLC240S025 is intended for residential applications where surge protection at the panel level is required. It is engineered to fit multiple load center brands, including BR, PL, ES, EQ, LC, PWRMARK Gold, and HOM panel families, making it a versatile option when servicing a wide range of existing installations. Electricians typically install this device during new construction or as a retrofit addition to an existing load center.

Key Features

• Type 1 SPD rated for installation on the supply side of the main disconnect
• 25kA surge current rating for whole-home transient voltage protection
• 240/120V, 50/60Hz compatibility for standard residential service
• Snap-in design allows fast installation in compatible load centers
• LED indication provides clear, visible status confirmation
• Listed to UL 1449 5th Edition and satisfies current NEC surge protection requirements for residential dwellings
• TPMOV technology for enhanced internal component safety

Compatibility

Designed to fit load centers from multiple manufacturers, including BR, PL, ES, EQ, LC, PWRMARK Gold, and HOM panel families, as specified by the manufacturer.

Installation Notes

Installation of a Type 1 SPD must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always shut off the main service disconnect and verify the panel is de-energized before beginning work. Confirm panel compatibility before installation, and follow all manufacturer installation instructions included with the device.

Technical Specifications

• Voltage Rating: 240/120V
• Frequency: 50/60Hz
• Surge Current Rating: 25kA
• SPD Type: Type 1
• Mounting Style: Snap-in panel mount
• Status Indication: LED
• Listing: UL 1449 5th Edition
• UPC: 782001503123

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: STLC240S025