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Overview
- UL Type 1 listed and UL1449 5th Edition compliant for 120/240VAC split-phase systems
- TPMOV® technology for superior surge clamping and thermal stability
- Compact design with 1/2" knockout mounting for space-constrained installations
- 2P+G configuration with 18" leads for flexible wiring options
- Directly attaches to HVAC disconnect switches for targeted surge suppression
Specifications
Application | Residential Panels HVAC systems Pool and Spa equipment |
Application | Any 120/240VAC split phase application HVAC applications Direct mounting to air condition disconnect switches |
Connection | Pre-wired |
Frequency Rating | 50/60 HZ |
Material | Polycarbonate |
Mounting | Panel Mount |
Operating Temperature, Maximum | 185 F |
Operating Temperature, Maximum | 85 C |
Operating Temperature, Minimum | -40 F |
Operating Temperature, Minimum | -40 C |
Phase | 1 |
Series | STXH |
Size | 3.2 x 1.85 x 3.22;81.28 x 46.99 x 81.788 in;mm |
Special Features | Mersen TPMOV Technology – does not require additional overcurrent protection Compact footprint for seamless integration with AC Disconnect Switches NEMA 4X enclosure for outdoor or indoor use Fits 1/2" knockouts with 18" leads for easy installation Up to 3 Modes of Protection (L-N, L-L, and L-G) Bright LED status indicator, visible from side profile through clear cover 3-year manufacturer’s warranty, plus up to 25k connected equipment warranty (For details see Warranty Statement) |
Standard | ANSI/UL 1449 5th Edition, Type 1 SPD, File E210793 CSA C22.2, Type 1 SPD ANSI/IEEE C62.41.1, C62.41.2, C62.45 UL96A Lightning Protection RoHS Compliant |
Type | NEMA UL CSA TYPE 1 |
Type of Indicators | LED |
UL SPD Type | Type 1 |
Voltage Rating | 120/240 Vac |
Package Dimensions (L x W x H) | 3.2 in x 1.85 in x 3.22 in |
Package Dimensions (L x W x H) | 81.28 mm x 46.99 mm x 81.788 mm |
Package Weight (Imperial) | 0.800 lb |
Package Weight (Metric) | 0.363 kg |
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How to Install the STXH240S05 Surge Protective Device
This guide provides step-by-step instructions for installing the STXH240S05 Surge Protective Device to protect your equipment from transient overvoltages.
Estimated time: 45m
Tools needed:
Screwdriver, Wire strippers, Multimeter
Supplies needed:
Mounting screws, Terminal connectors
- Confirm system voltage
Verify that the system voltage and configuration match the SPD voltage and configuration before proceeding with the installation.
- Turn off power
Turn off all power supplying the equipment and confirm that all sources are de-energized to ensure safety during installation.
- Determine mounting location
Select a mounting location for the SPD that is as close to the equipment as possible, ensuring that the LED status indicator will be visible.
- Mount the SPD
Securely mount the SPD using the appropriate mounting screws, ensuring it is level and firmly attached.
- Make electrical connections
Connect the electrical leads to the SPD, trimming them to the shortest length possible to avoid loops or sharp bends for optimum performance.
- Energize and verify operation
Restore power to the system and check that the green LED status indicator is on, confirming proper operation of the SPD.
Frequently Asked Questions about Mersen
What industries and applications are Mersen products used for?
Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.
What are the main product lines offered by Mersen?
Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.
What are the key features of Mersen products?
Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.
What environmental ratings do Mersen products have?
Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.
What accessories are available for Mersen products?
Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.
How are Mersen products typically installed?
Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.
What certifications and standards do Mersen products comply with?
Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.
What technical support does Mersen offer?
Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.