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Mersen STXR240S05 - The most popular range in the STX series offering, the Surge-Trap® Type 1 STXR meets requirements for UL1449 Fourth Edition and is ideal for the replacement of older surge arrestors. The STXR Series SPD feature TPMOV® technology inside making them the safest product available. With a small, compact design and line or load installation flexibility the STXR series is the perfect fit for branch panel and/or individual equipment protection., 240/120V, L-G, L-N, L-L, Split Phase, 50 kA per phase
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Mersen STXR240S05 The most popular range in the STX series offering, the Surge-Trap® Type 1 STXR meets…

Alternate Item Number: STXR240S05

UPC: 782001469658


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Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Mersen Surge-Trap® Type 1 STXR240S05 is a highly popular surge protection device (SPD) within the STX series, designed to meet the stringent requirements of UL1449 Fourth Edition. This model is an ideal replacement for older surge arrestors, offering enhanced safety and performance. At its core, the STXR Series SPD features Mersen's proprietary TPMOV® technology, ensuring it is among the safest surge protection products available on the market. Its compact design facilitates easy installation, offering flexibility for either line or load-side mounting. This makes the STXR240S05 perfectly suited for protecting branch panels and individual pieces of critical equipment. This specific unit is rated for 240/120V split-phase systems and provides a robust 50 kA per phase surge current handling capability. The STXR series is engineered for reliable protection against transient voltage surges, safeguarding sensitive electronics and electrical systems from damaging power fluctuations. Its UL listing signifies adherence to rigorous safety and performance standards, providing peace of mind for facility managers and engineers. Choose the Mersen STXR240S05 for dependable, advanced surge protection.
  • UL1449 Fourth Edition compliant Type 1 SPD
  • Features Mersen's TPMOV® technology for enhanced safety
  • Compact design for easy installation
  • Flexible line or load installation
  • 50 kA per phase surge current rating

Specifications

Application
Branch panel and/or individual equipment protection Commercial and Industrial Distribution Panels Control Panels
Brand Name
Mersen
Connection
Pre-wired with 3 ft 12 AWG conductors
Connection
Pre-wired
Connection Type
Line or Load
Current Rating
50 kA
Frequency
50-60 Hz
Frequency Rating
50/60 HZ
Frequency Rating, Maximum
60 Hz
Frequency Rating, Minimum
50 Hz
Insulation
Polycarbonate
Material
Polycarbonate
Mounting
Panel Mount
Mounting Type
Branch Panel or Individual Equipment
Operating Temperature, Maximum
185 F
Operating Temperature, Maximum
85 C
Operating Temperature, Minimum
-40 F
Operating Temperature, Minimum
-40 C
Phase
Split Phase
Poles
Split Phase
Series
STXR
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Size
3.25 x 3.35 x 3.35;82.55 x 85.09 x 85.09 in;mm
Size
Compact
Special Features
Designed with the industry leading Mersen TPMOV® Technology LED status indicator (ON = Good, OFF = Replace) NEMA 4X enclosure for outdoor or indoor use Fits 3/4" knockouts with 3' leads for easy installation Optional mounting bracket for surface mount applications Optional audible alarm and remote dry contacts For use in ANSI/UL Type 1 or 2 SPD installations Up to 10 modes of Protection (L-N, L-L, L-G optional, N-G optional) 5-year warranty
Special Features
Designed with industry leading Mersen TPMOV technology Optional mounting bracket for surface mount applications NEMA 4X enclosure for outdoor or indoor use Fits 3/4" knockouts with 3' leads for easy installation Up to 10 modes of Protection (L-N, L-L, L-G optional, N-G optional) Bright LED status indicator, visible from side profile through clear cover 5-year manufacturer’s warranty
Standard
ANSI/UL 1449 5th Edition, Type 1 SPD, File E210793 CSA C22.2, Type 1 SPD UL96A Lightning Protection RoHS Compliant
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 and Remote Audible Alarm
Type of Indicators
LED
UL SPD Type
Type 1
Voltage Rating
240/120 V
Package Weight (Imperial)
1.500 L
Package Weight (Metric)
0.680 kg
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CUSTOMDIN

DIN rail is a universal mounting option for electrical and industrial control products such as circuit breakers electrical supplies terminal blocks and more. The rail system is used to stabilize a wide variety of devices and products. Ordering pre-cut DIN rail helps increase productivity and decrease jobsite clutter. On-site Flexibility Streamline custom cuts DIN rail to any length so it is ready to use when it arrives on the jobsite. Additionally DIN rail can be easily removed if relocation is necessary. Features of Custom DIN Rail from Streamline - All cut DIN rail from Streamline is galvanized steel made to eliminate rusting. Streamline ensures that all custom DIN rail orders are: De-burred Custom Length Any quantity 1-1000+ Quick turnaround (typically 2 weeks or less from receipt of order) This mechanical support structure is a must for all electrical parts solutions big or small. DIN rail allows for mounting hardware easily and quickly. These durable and versatile rails make the perfect solution for all mounting applications. Save space time and money with these cost-effective mounting solutions. Order your custom cut DIN rail today!
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Frequently Asked Questions

What is the surge current rating for the STXR series?

The Surge-Trap STXR series has a surge current rating of 50kA per phase and per mode.

What is the response time for Surge-Trap SPDs?

The response time for Surge-Trap SPDs is less than 1 nanosecond per phase.

What is the warranty for the Surge-Trap STXT and STXP series?

Both the Surge-Trap STXT and STXP series have a 10-year manufacturer's warranty.

What is the surge current rating for the STXP series?

The Surge-Trap STXP series has a surge current rating of 100kA per phase.

What is the MCOV for the STXR240S05 model?

The Maximum Continuous Operating Voltage (MCOV) for the STXR240S05 model is 150V L-N, 300V L-G, 300V L-L, and 150V N-G.

What is the VPR for the STXR240S05 model?

The Voltage Protection Rating (VPR) for the STXR240S05 model is 700V L-N, 1200V L-G, 1200V L-L, and 600V N-G.

What is the operating temperature range for Surge-Trap STZ series?

The operating and storage temperature range for the Surge-Trap STZ series is from -31ºF (-35ºC) to +185ºF (85ºC).

What is the warranty period for the Surge-Trap STZ series?

The Surge-Trap STZ series comes with a 15-year product warranty.

What is the Short Circuit Current Rating (SCCR) for the STZ series?

The Short Circuit Current Rating (SCCR) for the Surge-Trap STZ series is 200kA.

What is the warranty for the Surge-Trap STXR series?

The Surge-Trap STXR series comes with a 5-year manufacturer's warranty.

How to Install the STXR240S05 Surge Protective Device

This guide provides step-by-step instructions for the installation and initial setup of the STXR240S05 Surge Protective Device to ensure optimal performance and safety.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors

  1. Turn off power

    Ensure that all power supplying the equipment is turned off and confirm that all sources are de-energized before proceeding with the installation.

  2. 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 and keeping leads straight and short.

  3. Mount the SPD

    Securely mount the SPD to the designated location using the appropriate mounting screws, ensuring it is level and firmly attached.

  4. Make electrical connections

    Connect the SPD to the electrical system according to the wiring diagram, ensuring that leads are trimmed to the shortest length possible and avoiding loops or sharp bends.

  5. Energize the system

    Turn the power back on and verify the proper operation of the SPD by checking that the green LED status indicator is illuminated.

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.