Mersen STXT480D10 - The most advanced of the STX series, the Surge-Trap® Type 1 STXT Series comes standard with EMI/RFI Filtering and surge capacities up to 200kA. The STXT 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. 480V, L-G, L-L, 3-Phase Delta, LED 100 kA per phase
Mersen

STXT480D10

Alternate Item Number: STXT480D10

UPC: 782001470999


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Overview

The Mersen STXT480D10 Surge-Trap Type 1 is the most advanced unit in the STX series, designed for 480V 3-phase delta electrical systems. This surge protection device delivers a maximum surge capacity of 200kA (100kA per phase) and integrates TPMOV® technology for superior surge suppression and safety. Unlike conventional surge protectors, the STXT480D10 eliminates the need for additional overcurrent protection, simplifying installation and reducing system complexity. Standard EMI/RFI filtering ensures clean power delivery by attenuating electromagnetic and radio frequency interference, protecting sensitive equipment from noise-related damage. Each phase includes an LED indicator for real-time status monitoring, while optional remote indication enables centralized oversight in distributed systems. The unit supports flexible installation on either the line or load side, making it suitable for service entrances, distribution panels, and branch panels. With a compact design and versatile mounting options, the STXT480D10 integrates seamlessly into existing 480V delta systems. Its robust surge rating and advanced filtering make it ideal for critical infrastructure in industrial, commercial, and utility applications.
  • 480V 3-phase delta voltage rating for industrial systems
  • 100kA per phase surge capacity (200kA total)
  • TPMOV® technology for advanced surge suppression and safety
  • Built-in EMI/RFI filtering for clean power delivery
  • LED indicators on each phase with optional remote indication
  • Flexible line or load side installation for service entrances, distribution, and branch panels

Specifications

Application
Service entrance at low to medium risk exposure level Commercial and Industrial Distribution Panels or Control Branch Panels Any critical application that requires a high to medium level of protection
Brand Name
Mersen
Color
Blue
Connection
Pre-wired
Connection Type
Screw Terminal
Frequency
50-60 Hz
Frequency
60 Hz
Frequency Rating
50/60 HZ
Frequency Rating, Maximum
60 Hz
Frequency Rating, Minimum
50 Hz
Insulation
Polycarbonate
Material
Poly
Material
Polycarbonate
Mounting
Panel or Wall Mount
Mounting Type
Line or Load Side
Operating Temperature, Maximum
185 F
Operating Temperature, Maximum
85 C
Operating Temperature, Minimum
-40 F
Operating Temperature, Minimum
-40 C
Phase
3-
Poles
3P+G (Delta)
Poles
3P
Poles
3P+G
Poles
3-Phase Delta
Series
STXT
Series
STX
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Size
7.4 x 7.08 x 3.68;187.96 x 179.832 x 93.472 in;mm
Special Features
Designed with industry leading Mersen TPMOV technology Standard features include LED phase loss indication and EMI/ RFI filter Up to -50dB from 10kHz to 100MHz Optional Form C Dry Contacts and audible alarm with silence button Mounting hub and mounting feet for installation flexibility Up to 10 Modes of Protection 10-year manufacturer’s warranty
Special Features
Designed with the industry leading Mersen TPMOV® Technology (internally fused) Premium 200kA surge capacity for longer life and higher single impulse withstand Includes EMI/RFI filter for cleaner attenuation LED status indicator (ON = Good, OFF = Replace) LED phase loss indicators (ON = Operational, OFF = Maintenance Required) NEMA 4X enclosure for outdoor or indoor use Mounting hub and mounting feet for installation flexibility 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, N-G) 10-year warranty
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
480 V
Package Weight (Imperial)
3.700 L
Package Weight (Metric)
1.678 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.