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Mersen MPDB63103 - Open-Style PDB UL 1953 1000V 65A Tin-plated Aluminum - 85A 3-Pole 1 - 1 openings; #4-#14 --- #4-#14 Box to Box
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Mersen MPDB63103 Open-Style PDB UL 1953 1000V 65A Tin-plated Aluminum - 85A 3-Pole 1 - 1 openings; #4-#14…

Alternate Item Number: MPDB63103

UPC: 782001450083


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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 MPDB63103 is a UL 1953-certified open-style power distribution block engineered for safe and efficient cable splicing, power splitting, and fixed junction tap-off points in industrial electrical systems. Rated for 1000V and 65A continuous current, this miniature 3-pole PDB features tin-plated aluminum construction for enhanced corrosion resistance and reliable conductivity in harsh environments. The box-to-box connection design supports wire sizes from #4 to #14 AWG, making it ideal for feeder and branch circuit applications where UL508A and NEC spacing requirements must be met. As part of Mersen’s MPDB series, this block offers a compact footprint while accommodating single or dual primary inputs and up to 30 secondary outputs, with specialty configurations available for up to 7 primary inputs. The open-style mounting provides easy access for installation and maintenance, reducing downtime in panel builds. Certified for both UL and CSA compliance, the MPDB63103 ensures safety and performance in industrial control panels, machinery, and distribution systems. The PDB63103 supports 1-1 openings, meaning it has one set of box-to-box connections per pole, optimizing space in tight installations. Its tin-plated aluminum construction balances lightweight durability with cost-effective conductivity, while the UL 1953 certification confirms compliance with stringent safety standards for power distribution components. The 65A continuous current rating ensures reliable operation in applications requiring stable power delivery, and the 1000V rating supports high-voltage industrial environments. The block’s design aligns with NEC and UL508A spacing requirements, making it suitable for integration into compliant electrical panels and machinery.
  • UL 1953 and CSA certified for safety and compliance
  • 1000V voltage rating with 65A continuous current capacity
  • Tin-plated aluminum construction for corrosion resistance
  • Miniature 3-pole design with open-style mounting
  • Supports #4 to #14 AWG wire sizes for box-to-box connections

Specifications

Amperage Rating
85 A
Ampere Rating (AL)
65 A
Ampere Rating (CU)
85 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 Aluminum
Mounting
Direct Screw Mount
Number Of Terminals
3-pole
Size
3.08 x 2.91 x 2.81 in
Size
78.232 x 73.914 x 71.374 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)
#4-#14
Wire Range (Secondary)
#4-#14
Package Dimensions (L x W x H)
3.08 in x 2.91 in x 2.81 in
Package Dimensions (L x W x H)
78.232 mm x 73.914 mm x 71.374 mm
Package Weight (Imperial)
0.560 lb
Package Weight (Metric)
0.254 kg
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Frequently Asked Questions

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

The blocks are rated for 1000VAC/DC and have an SCCR of 100kA with a properly sized fuse.

How are Mersen power distribution blocks mounted?

The power distribution blocks are designed for direct panel mounting.

What are the wire range capabilities for the MPDB63103 model?

The MPDB63103 model supports a wire range of 4-14 AWG on both line and load sides, with one opening per pole.

What is the ampacity for copper and aluminum wire for the MPDB63103?

For the MPDB63103, the ampacity is 85A for copper wire and 65A for aluminum wire.

Are Mersen power distribution blocks RoHS compliant?

Yes, the MPDB series power distribution blocks are RoHS compliant and lead-free.

What types of wire can be used with Mersen aluminum and copper blocks?

Aluminum blocks accept AL or CU wire, while copper blocks accept CU wire only. Both can accommodate DLO-type fine-strand wire.

What is the insulating material used in these power distribution blocks?

The insulators are made of glass-filled polycarbonate with a dielectric strength exceeding 2500V and meet UL94-V0 flammability rating.

Are safety covers and end barriers available for MPDB blocks?

Yes, optional snap-on hinged safety covers and end barriers are available for various MPDB series.

What are the specifications for DLO wire on the MPDB63150 model?

The MPDB63150 supports DLO wire in the 1/0-14 AWG range with an amp rating of 125A.

What are the spacing requirements for feeder and branch circuits?

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

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.