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Mersen MPDB66401 - Open-Style PDB UL 1953 1000V Tin-plated Copper - 380A 1-Pole 1 - 1 openings; 500-#4 --- 500-#4 Box to Box
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Mersen MPDB66401 Open-Style PDB UL 1953 1000V Tin-plated Copper - 380A 1-Pole 1 - 1 openings; 500-#4…

Alternate Item Number: MPDB66401

UPC: 782001451509

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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 MPDB66401 is an advanced Open-Style Power Distribution Block (PDB) designed for robust power management in industrial applications. Engineered by Mersen, a leader in electrical power solutions, this block offers a reliable and efficient method for splicing cables, splitting primary power into secondary circuits, and establishing fixed junction tap-off points. It meets stringent UL 1953 standards and is CSA approved, ensuring compliance with feeder and branch circuit spacing requirements as per UL508A and the National Electrical Code®. The MPDB66401 features a 1000V voltage rating and a substantial 380A current rating, making it suitable for high-power distribution needs. Constructed from high-conductivity tin-plated copper, it ensures excellent electrical performance and durability. This 1-pole configuration provides a single primary input and is designed for box-to-box connection, facilitating straightforward integration into existing electrical systems. The MPDB66401 belongs to Mersen's intermediate size category (MPDB66 and MPDB67 series), offering a balance of capacity and footprint. It supports multiple secondary connections, with the catalog description indicating capacity for 500-#4 conductors from box to box, highlighting its versatility for complex wiring configurations. Mersen's PDBs are recognized for their safety and ease of use, simplifying installation and maintenance tasks. This specific model, SKU MPDB66401, manufactured in Germany (DE), represents the next generation of power distribution blocks, providing a secure and organized solution for power distribution challenges.
  • 1000V Voltage Rating for high-power applications
  • 380A Current Rating for robust power distribution
  • Tin-plated Copper construction for superior conductivity
  • 1-Pole configuration for simplified circuit management
  • UL 1953 and CSA approved for safety and compliance

Specifications

Amperage Rating
380 A
Ampere Rating (CU)
380 A
Application
Splicing cables Splitting primary power into secondary circuits Fixed junction tap-off points.
Brand Name
Mersen
Connection
Box To Box
Connector Type (Primary)
Box
Connector Type (Secondary)
Box
Material
Tin-plated Copper
Mounting
Direct Screw Mount
Number Of Terminals
1
Size
3.08 x 1.85 x 3.25 in
Size
78.232 x 46.99 x 82.55 mm
Special Features
Adder Poles: All sizes have optional adder poles for increased flexibility and ease-of-use. Adder poles can be stacked to form multi-pole units in the field without the use of tools. Adder poles allow for customization of primary and secondary wire combinations. End barriers are also available for sale, catalog numbers can be found in the catalog number selection tables for each size block. Wire Connectors: Standard aluminum and copper wire connectors are available. Aluminum connectors accept both AL or CU wire while copper connectors accept CU wire only. Connectors are all 1-piece tin-plated. Many part numbers are rated to accept DLO-type fine-strand wire, allowing users to connect flexible conductors. Insulators: Insulators are virtually unbreakable, made of glass-filled polycarbonate. “See-through,” hinged safety covers are optional and provide a greater degree of safety and shock resistance where required. Hinged covers can be installed without tools. Spacings: 1 inch through air and 2 inches over surface between uninsulated live parts of opposite polarity meets requirements for feeder and branch circuit applications of UL508A. Safety Covers: Polycarbonate safety covers provide dead-front protection. One cover is needed for each pole. Each cover has a test probe hole in the center for circuit checking. Covers are optional accessories and catalog numbers can be found in the catalog selection tables for each size block.
Standard
UL Listed to subject 1953, File E352417 unless noted otherwise CSA Certified Class 6228 01
Type
Open-Style Power Distribution Blocks
Voltage Rating
1000 V
Wire Range (Primary)
500-#4
Wire Range (Secondary)
500-#4
Package Dimensions (L x W x H)
3.08 in x 1.85 in x 3.25 in
Package Dimensions (L x W x H)
78.232 mm x 46.99 mm x 82.55 mm
Package Weight (Imperial)
1.200 lb
Package Weight (Metric)
0.544 kg
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Frequently Asked Questions

What are the voltage and current ratings for Mersen power distribution blocks?

These blocks are rated for 1000VAC/DC and have ampere ratings from 65 to 2260A, based on NEC table 310.15(B)(16) 75ºC ampacities.

What types of wire can be connected to these power distribution blocks?

Aluminum connectors accept both AL or CU wire, while copper connectors accept CU wire only. Many part numbers are rated for DLO-type fine-strand wire.

What are the UL and CSA approvals for Mersen power distribution blocks?

Unless noted otherwise, all blocks are UL and CSA approved and meet spacing requirements for feeder and branch circuits.

What is the SCCR rating for these power distribution blocks?

The Short Circuit Current Rating (SCCR) is 100kA when used with a properly sized fuse. Refer to Mersen's PDB SCCR guide for details.

What are the physical spacing requirements for these blocks?

The blocks meet UL508A requirements with 1 inch through air and 2 inches over surface spacing between uninsulated live parts of opposite polarity.

What material are the insulators made of and what is their dielectric strength?

Insulators are made of virtually unbreakable, glass-filled polycarbonate with a dielectric strength exceeding 2500V.

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.