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Mersen 420TPMOV - Mersen's patented TPMOV® (Thermally Protected Metal Oxide Varistor ) eliminates common destructive failure modes associated with standard MOVs. Comprised of a voltage clamping device and a disconnecting apparatus that monitors the status of the metal oxide disk inside the TPMOV, the device is securely disconnected in the event of an overvoltage by an arc shield. Upon failure, the TPMOV is also equipped with a visual pin indicator as well as a normally open microswitch providing remote indication, if applicable. 420 Volts standard series.
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Mersen 420TPMOV Mersen's patented TPMOV® (Thermally Protected Metal Oxide Varistor ) eliminates common…

Alternate Item Number: 420TPMOV

UPC: 782001286095

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Specification Sheet

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Minimum Qty: 10

Multiplier: 10

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

Overview

Mersen’s 420TPMOV TPMOV® (Thermally Protected Metal Oxide Varistor) is a patented surge suppression component designed to eliminate destructive failure modes common in standard MOVs. This advanced device integrates a voltage clamping mechanism with a built-in disconnecting apparatus that actively monitors the metal oxide disk’s status. In the event of overvoltage breakdown, the TPMOV® is securely disconnected from system power via an arc shield, preventing catastrophic failure. The 420TPMOV is rated for 420V maximum continuous operating voltage (MCOV) and delivers superior surge protection with a nominal discharge current rating of 10kA and surge capacity of 50kA (8/20μs). Key features include a visual pin indicator for immediate failure detection and a normally open microswitch for remote indication, enabling proactive maintenance and system monitoring. The device is designed for OEM applications and is compliant with ANSI/UL 1449 5th Edition (Type 1 SPD) and RoHS standards. With a consistent footprint matching standard 25–40mm MOVs, the 420TPMOV integrates seamlessly into existing designs without requiring upstream overcurrent protection. Its self-protected architecture eliminates the need for additional fuses, reducing system complexity and cost. The TPMOV® technology is ideal for industrial, commercial, and utility applications where reliability and fail-safe operation are critical. Applications include power distribution systems, motor controls, renewable energy installations, and sensitive electronic equipment. The 420TPMOV is manufactured in the US by Mersen, a trusted leader in electrical protection solutions.
  • Patented TPMOV® technology eliminates common MOV failure modes
  • 420V maximum continuous operating voltage (MCOV)
  • 50kA surge capacity (8/20μs) with 10kA nominal discharge current rating
  • Visual pin indicator and normally open microswitch for remote failure indication
  • ANSI/UL 1449 5th Edition Type 1 SPD compliant; RoHS compliant
  • No upstream overcurrent protection required; self-protected design
  • Consistent footprint with standard 25–40mm MOVs for easy integration

Specifications

Application
Surge protective devices and systems AC / DC distribution systems High voltage power supplies Telecommunications equipment Motor control systems Computer related products PLC applications Power transfer switches
Application
For OEM design and build
Brand Name
Mersen
Connection
Solder
Frequency Rating
50/60 HZ
Material
Metal Oxide Varistor
Material
PET (Polyethelene Terphthalate)
Mounting
PCB Mount
Operating Temperature, Maximum
185 F
Operating Temperature, Maximum
85 C
Operating Temperature, Minimum
-40 F
Operating Temperature, Minimum
-40 C
Series
TPMOV
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Size
2.35 x 1.69 x 0.63;59.69 x 42.926 x 16.002 in;mm
Special Features
Industry-leading TPMOV technology available in 50kA and 75kA surge capacities Consistent footprint with 25–40mm MOVs Built-in visual/remote indication optional No additional overcurrent protective device (fuses) required
Standard
ANSI/UL 1449 5th Edition, Type 1 Component Assembly SPD, File E210793 RoHS Compliant
Type
Thermally Protected MOV (TPMOV)
Type
TPMOV (Thermally Protected MOV)
Type Of Indicators
Microswitch
UL SPD Type
Type 1 Component Assembly
Voltage Rating
420 VAC
Package Dimensions (L x W x H)
2.35 IN x 1.69 IN x 0.63 IN
Package Dimensions (L x W x H)
5.969 cm x 4.2926 cm x 16.002 mm
Package Weight (Imperial)
0.120 L
Package Weight (Metric)
0.054 kg
Power supply for DIN-rail

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The TX6A™ 10Gig Cat 6A UTP Patch Cord is a 1-Meter, Blue cord constructed of 24 AWG, unshielded, twisted pair stranded, LSZH (60332-1) cable with high-performance modular plugs. Its MaTriX Tape Technology limits alien crosstalk, ensuring 10 Gb/s transmission. The tangle-free latch prevents snags and ensures a fast release, streamlining moves, adds, and changes. Enabled with RapidID, the product has pre-installed barcodes for simple port mapping using RapidID software.

UTP6AL1MBU

The TX6A™ 10Gig Cat 6A UTP Patch Cord is a 1-Meter, Blue cord constructed of 24 AWG, unshielded, twisted pair stranded, LSZH (60332-1) cable with high-performance modular plugs. Its MaTriX Tape Technology limits alien crosstalk, ensuring 10 Gb/s transmission. The tangle-free latch prevents snags and ensures a fast release, streamlining moves, adds, and changes. Enabled with RapidID, the product has pre-installed barcodes for simple port mapping using RapidID software.
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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!

CUSTOMDIN

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Fiber cable ODC to SC duplex - 670mm

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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.