Mersen STXT44S1004X - The Surge-Trap® Type 1 XT Series offers Advanced Technology. The XT features TPMOV® technology inside making it the safest product available. With line or load side installation flexibility, this unit is a great fit from the service entrance all the way down to each distribution and/or branch panel. 250/440 Volts 3P Wye system type .
Mersen

STXT44S1004X

Alternate Item Number: 782001429119

UPC: 782001429119

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Overview

The Mersen Surge-Trap® Type 1 XT Series (SKU: STXT44S1004X) represents the pinnacle of advanced surge protection technology for critical industrial and commercial electrical systems. Engineered with Mersen's proprietary TPMOV® (Thermal Protected Metal Oxide Varistor) technology, this surge protective device (SPD) offers unparalleled safety and reliability, ensuring the utmost protection against damaging transient overvoltages. The XT Series is designed for robust performance in 250/440 Volt, 3-Phase Wye system configurations, making it an indispensable component for safeguarding sensitive equipment and maintaining operational continuity. Installation flexibility is a key advantage of the Surge-Trap® XT Series. Its design allows for seamless integration on either the line or load side of electrical panels. This adaptability makes it an ideal solution for a wide range of applications, from the main service entrance of a facility to individual distribution and branch panels. By deploying the XT Series at multiple protection points, you create a comprehensive surge suppression strategy that defends your electrical infrastructure against the unpredictable nature of power surges, lightning strikes, and other transient events. Key features and benefits of the Mersen Surge-Trap® Type 1 XT Series include: * **TPMOV® Technology:** Integrated thermal disconnects provide inherent protection against varistor failure, preventing thermal runaway and ensuring safe operation. This advanced technology significantly enhances safety compared to standard MOVs. * **Type 1 SPD:** Designed for installation at the service entrance or upstream of the main overcurrent protection device, offering the highest level of protection. * **Flexible Installation:** Suitable for both line-side and load-side connections, offering versatile application possibilities. * **System Compatibility:** Specifically designed for 250/440 Volt, 3-Phase Wye systems, common in many industrial and utility environments. * **Broad Application Range:** Protects service entrances, main distribution panels, sub-panels, and critical branch circuits. * **Enhanced Safety:** The TPMOV® technology ensures that if a varistor fails, it disconnects safely from the circuit, preventing potential fire hazards. * **Reliable Performance:** Mersen is a globally recognized leader in electrical protection, and the Surge-Trap® XT Series embodies their commitment to quality and durability. The Surge-Trap® XT Series is engineered to meet the demanding requirements of modern electrical systems. In industrial settings, where machinery and sensitive control systems are prevalent, effective surge protection is not just beneficial but essential to prevent costly downtime and equipment damage. For commercial buildings, protecting IT infrastructure, HVAC systems, and lighting controls from power surges is crucial for maintaining operations and occupant comfort. The UNSPSC code for this product is 39121610, indicating its classification within electrical surge protection equipment. Choosing the Mersen Surge-Trap® Type 1 XT Series means investing in a superior surge protection solution that prioritizes safety, reliability, and long-term performance. Its advanced technology and versatile design make it a prudent choice for electricians, facility managers, and engineers seeking to protect their valuable electrical assets from the disruptive and damaging effects of power surges. Ensure the integrity of your electrical systems with the trusted protection of Mersen.
  • Advanced TPMOV® technology for inherent thermal protection and enhanced safety.
  • Type 1 Surge Protective Device (SPD) ideal for service entrance installations.
  • Flexible line or load side installation for versatile application in distribution and branch panels.
  • Designed for 250/440 Volt, 3-Phase Wye system configurations.
  • Mersen's trusted engineering ensures reliable protection against transient overvoltages.

Specifications

Application
Service Entrance AC Distribution Power supplies Drive Protection Large Control Panels Telecommunications IT / Data centers
Brand Name
Mersen
Connection
Box
Connection Type
Line or Load Side
Mounting
Screw
Poles
3P Wye
Series
XT Series
Series
Surge-Trap® XT Series Type 1
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Short-Circuit Rating
200.0000 kA
Special Features
UL 1449 Third Edition Listed (Sept 2009) Type 1 SPD – All UL required OCP & safety coordination included inside Can be installed line-side or load-side of main disconnect 20kA Nominal discharge current 200kA SCCR (most models) UL 96A Lightning Protection Master Label compliant (@20kA, In) NEMA 4X polycarbonate enclosure – UL 746C(f1) & UL 94-5VA TPMOV&reg, Technology Inside All MOV suppression elements monitored Filtering - AC sinewave tracking filter with EMI/RFI filtering up to -50dB from 10khz to 100mhz Phase-loss monitoring (toggles LED and dry contacts) Ten-year Warranty
Standard
UL 1449 Third Edition, cUL, UL 1283 R/C UL File: VZCA.E210793 RoHS Compliant IEC 61643 CE Burn-In tested prior to shipment UL 96A lighting protection master label
Sub Brand
Surge-Trap®
Type
Surge-Trap Type 1 & 2
Type Of Indicators
LED
Voltage Rating
440 VAC
Voltage Rating
250/440 VAC
Package Dimensions (L x W x H)
7.55 IN x 5.997 IN x 3.92 IN
Package Dimensions (L x W x H)
19.177 cm x 15.2324 cm x 9.9568 cm
Package Weight (Imperial)
5.000 L
Package Weight (Metric)
2.268 kg
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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.