Mersen Surge-Trap, 120/240V Split Phase, Load Center Mount Mount, LED Status Indicator, Mounts in most 1" pitch load centers
In StockMersen Surge-Trap, 120V Single Phase, External Panel Mount, LED Status Indicator, Threaded connection for 1/2” knockout (0.875” hole)
In StockMersen Surge-Trap, 120/240V Split Phase, External Panel Mount, LED Status Indicator, Threaded connection for 1/2” knockout (0.875” hole)
In Stock• Whole-house surge protection
• Load center mount model snaps into most major brand load center double pole breaker slots such as Eaton, Siemens, Murray, ABB, General Electric, Schneider, and Square D
• LED status indicator
• Single and Split Phase Protection
• Meets NEC 2020 230.67 requirements for residential dwellings
• UL 1449 Type 1 and Type 2 for use in either Service Entrance or Load Side installations
A surge protective device (SPD) protects electrical and electronic equipment from overvoltage conditions that that can cause damage or destruction of the protected devices. SPDs operate by directing overvoltage to ground, while allowing the specified operating voltage to remain on the protected equipment. SPDs models are available for external panel mounting, DIN-Rail mounting and load center (breaker panel/panel board/breaker box) installation.
An entire home’s worth of devices can be protected with only 1 or 2 SPDs. Modern homes can be filled with surge sensitive equipment such as:
• Home Office - Computer, Monitor, Printer
• Living / Family Room - Entertainment System, Television, Smart Thermostat
• Bedrooms - Mobile Devices (tablets, cell phones, games), Television
• Kitchen - Stove, Refrigerator, Small Appliances, Home Hub
• Laundry Room - Washer, Dryer
• Garage - Charging Station, Power Tools
• Utility Room - Furnace, Water Heater, HVAC
• External Systems - Rooftop Solar Panels, Wind Turbine, Security System
Surge Trap Residential FlyerUL Type 1 SPDs must be used on the power utility line side. Type 1 SPDs can be used anywhere within the electrical system. Type 2 SPDs can be used anywhere after the first overcurrent device at the load center in the electrical system. Figure 1. below depicts a residential model for determining the Type Rating for the SPD. Type 3 SPDs aka surge strips are only for point-of-use applications (not available).
Only qualified licensed electricians should install or service SPDs
Load center mount SPD installs directly into the home’s breaker panel and are designed to work with most load centers with 1” spacings
| LOAD CENTER BRAND / SERIES | CIRCUIT BREAKER TYPE |
|---|---|
| Eaton / BR Series (prefix 1BR or B in the part number) | BR215….BR250, BR, 2P, 120/240 V AC, 15A…50A |
| Siemens Industry / PL Series (prefix P or PW in the part number) | Q215 … Q250, QP, 2P, 120/240VAC, 15A… 50A |
| Siemens Industry / ES Series (prefix S or SW in the part number) | Q215 … Q250, QP, 2P, 120/240VAC, 15A… 50A |
| Siemens Industry / EQ Series (prefix E in the part number) | Q215 … Q250, QP, 2P, 120/240VAC, 15A… 50A |
| Murray/Siemens Industry / LC Series (prefix LC or LW in the part number) | MP215 … MP250, MP, 2P, 120/240VAC, 15A… 50A |
| ABB / General Electric / Powermark Gold Series (prefix TL, TM or TP in the part number) | THQL215 … THQL250, 2P, 120/240 V AC, 15 … 50 A |
| Schneider Electric USA - Square D / Homeline Series (prefix HOM in the part number) | HOM215 ... HOM250, 2P, 120/ 240 V AC, 15 ... 50 A |
The external panel mount models use industry standard knockouts and are UL Type 4X for indoor/outdoor use. They are ideal for use in these applications
• External HVAC Disconnect Panels, Workshop / Storage, Irrigation Systems & Well Pumps, Swimming Pool Pump, EV Charging & More!
• Homes with non-standard load centers
• Homes with a completely filled load center
SPDs are required as specified in the National Electrical Code:
• Surge protection devices shall be provided at all facility voltage distribution levels for critical operation power systems (COPS). NEC 708.20
• Surge protection shall be provided for Critical Operations Data Systems. NEC 645.18
• Where any of the disconnecting means in 620.51 has been designated as supplying an emergency system load, surge protection shall be provided. NEC 620.51(E)
• A listed SPD shall be installed in or on all emergency systems switch boards and panel boards. NEC 700.8
• Industrial machinery with safety interlock circuits shall have surge protection installed. NEC 670.6
• A surge protection device shall be installed between a wind electric system and any loads served by the premise electrical system. NEC 694.7 (D)
• A listed surge protection device shall be installed in or on the fire pump controller. NEC 695.15
• All services supplying dwelling units shall be provided with a surge protection device at the incoming electrical service equipment. NEC 230.67 Exception 230.67(B) allows for
• UL96A is the standard for lightning protection systems. Section 13.1 of UL96A specifies the requirement of SPDs for AC power as part of the total lightning protection system. Type 1 or Type 2 SPDs can be used as defined in 13.1. SPDs alone cannot protect against a direct lightning strike.
