Mersen MPDB Series Open-Style ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$62.64
Mersen MPDB Series Open-Style Power Distribution Block, Tin-Plated Aluminum, 135A-500A Motor FLA

Mersen MPDB Series Open-Style Power Distribution Block, Tin-Plated Aluminum, 135A-500A Motor FLA

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Model: MPDB63130

In Stock (leaves warehouse same day if ordered before 3pm ET)

$62.64
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Mersen MPDB Series Open-Style Power Distribution Block, Tin-Plated Aluminum

The Mersen MPDB Series Open-Style Power Distribution Block (PDB) is engineered for splicing cables, splitting primary power into secondary circuits, and providing fixed junction tap-off points in commercial and industrial electrical systems. This family is available across Motor FLA ratings from 135A to 500A, letting panel builders select the configuration that matches their motor branch-circuit load. Built with tin-plated aluminum connectors and a glass filled polycarbonate insulating body, the MPDB Series is rated 1000V AC/DC (UL and CSA), UL 1953 compliant, and configured with 1-4 openings accepting 2/0-#14 AWG on the primary side and #4-#14 AWG box-to-box on the secondary side. It meets spacing requirements for feeder and branch circuits per UL508A and the National Electrical Code®, making it a dependable choice across the full 135A-500A Motor FLA range.

Key Features

  • Motor FLA Range: Available in 135A and 500A configurations to match a wide span of motor branch-circuit loads.
  • Wire Range: 2/0-#14 AWG primary, #4-#14 AWG secondary, across 1-4 openings for flexible circuit tap-off configurations.
  • Durable Construction: Tin-plated aluminum connectors paired with a glass filled polycarbonate insulating body for corrosion resistance and mechanical strength.
  • Box-to-Box Connection: Box connector type on both primary and secondary terminations for secure conductor splicing.
  • Electrical Rating: Rated 1000V AC and 1000V DC (UL), 50/60 Hz, AC/DC application.
  • Short Circuit Rating: 100 kA with a 60A fuse (Class G), 100 kA with a 30A fuse (Class CC), and 10 kA standalone.
  • Installation: Direct screw mount installation for straightforward panel and enclosure integration.
  • RoHS Compliant: Meets RoHS material restrictions for environmentally responsible manufacturing.

Certifications & Compliance

  • UL 1953 Listed
  • UL and CSA Approved
  • Meets UL508A and National Electrical Code® spacing requirements
  • RoHS Compliant

Technical Specifications

  • Motor FLA Options: 135A, 500A
  • ROHS Compliant: Yes
  • Connector Type (Primary): Box
  • Connector Type (Secondary): Box
  • Rated Voltage AC (UL): 1000 V
  • Rated Voltage DC (UL): 1000 V
  • Short Circuit Rating (Class G): 100 kA with 60A Fuse
  • Short Circuit Rating (Class CC): 100 kA with 30A Fuse
  • Short Circuit Rating (Standalone): 10 kA
  • Installation Mounting: Direct Screw Mount
  • Frequency: 50/60 Hz
  • AC or DC: AC/DC
  • Connector Material: Tin-plated Aluminum
  • Body/Insulating Material: Glass Filled Polycarbonate
  • Packaging: 6 EA

Typical Applications

  • Commercial and Industrial Power Distribution
  • Splicing and Splitting Primary Power into Secondary Circuits
  • Fixed Junction Tap-Off Points
  • Panelboard and Switchgear Wiring
  • UL508A Panel Building Applications
  • Motor Branch-Circuit Load Distribution (135A-500A FLA)

Why Mersen?

Mersen power distribution blocks combine tin-plated aluminum connectors, a glass filled polycarbonate body, and UL 1953/UL508A-compliant construction to deliver dependable, code-compliant power splicing for demanding electrical installations. With a Motor FLA range spanning 135A to 500A, direct screw mount installation, high short circuit ratings, and RoHS-compliant materials, the MPDB Series is built for reliable performance in professional panel and distribution work.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Rated voltage AC UL:
1000 V
Number of Poles:
Adder
Short Circuit Rating (Class G):
100 kA with 60A Fuse
Installation Mounting:
Direct Screw Mount
Short Circuit Rating (Class CC):
100 kA with 30A Fuse
ROHS Compliant:
Yes
Frequency (Hz):
50/60 Hz
Short Circuit Rating (Standalone):
10 kA
AC or DC:
AC/DC
Connector Material:
Tin-plated Aluminum
Connector Type (Primary):
Box
Rated voltage DC UL:
1000 V
Connector Type (Secondary):
Box
Body/Insulating Material:
Glass Filled Polycarbonate
list_batch:
MERSEN-20260825
Department:
Electrical
Product Group:
Power Distribution
Product Type:
Power Distribution Block
Product Material:
Tin-Plated Aluminum
Connection Type:
Box
Voltage Rating:
1000V
Amperage Rating:
135A-500A
Listing:
UL Listed
Standards:
UL508A
Product Subgroup:
Power Distribution Blocks

Mersen MPDB63130 – Frequently Asked Questions

1) What wire sizes will the Mersen MPDB power distribution block accept on the primary and secondary side?
The MPDB Series takes 2/0 through #14 AWG on the primary side and #4 through #14 AWG on the secondary, with box-type connectors on both ends. Openings run 1 to 4 depending on configuration, so one block can feed several tap-off circuits. Conductors land in box lugs, not under saddle clamps or set screws on a bus bar.
2) Which Mersen MPDB part number do I order for a 135A motor versus a larger motor load?
Two Motor FLA configurations are offered: MPDB63130 at 135A and MPDB69130 at 500A. Pick the one at or above the full-load amps of the motor branch circuit you are feeding. There is no intermediate FLA step between them, so a 200A motor load goes to the 500A block.
3) Is the Mersen MPDB block rated for 600V panel work and for DC circuits?
It is rated 1000V AC and 1000V DC under UL, so a 480V or 600V AC panel is well inside the rating, and DC use is covered at the same 1000V. Frequency rating is 50/60 Hz. That DC rating makes it usable in solar and battery distribution as well as standard AC panelboards.
4) Will this power distribution block pass a UL508A panel inspection?
Yes. The MPDB Series is UL 1953 compliant, UL and CSA approved, and meets the spacing requirements for feeder and branch circuits under UL508A and the National Electrical Code. That is the combination a UL508A panel shop needs on record for a splice or tap block inside an industrial control panel.
5) What short circuit current rating can I use for this block on my panel label?
Standalone SCCR is 10 kA. Protected by a Class CC fuse up to 30A it is 100 kA, and protected by a Class G fuse up to 60A it is also 100 kA. If your panel label needs more than 10 kA, the block has to sit behind one of those fuse classes at or below the stated amp rating.
6) Is this an open-style block or an enclosed one, and how does it mount?
Open style, mounted by direct screw into the panel back plate or enclosure subpanel. Because the terminations are exposed, it has to be installed inside an enclosure or behind a dead front; it is not a finger-safe or covered block on its own.
7) Can I use aluminum conductors with the Mersen MPDB, and will it hold up in a corrosive environment?
The connectors themselves are tin-plated aluminum in a glass filled polycarbonate body. The tin plating is what gives the corrosion resistance and the dissimilar-metal tolerance at the lug, and the glass filled body carries the mechanical and dielectric load. Wire sizing still has to follow the block's stated 2/0-#14 primary range.
8) Does the Mersen MPDB block meet RoHS for a government or institutional spec?
Yes, the MPDB Series is RoHS compliant, alongside its UL Listing and UL508A spacing compliance. That covers the material-restriction line item most public-sector and healthcare electrical specs carry.
9) Do Mersen MPDB blocks come individually or in a multipack?
They are packaged 6 each, so a single order unit covers a run of panels rather than one enclosure. Worth knowing if you are buying for a one-off repair versus standardizing a build.
How fast can I get the Mersen MPDB63130 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Mersen MPDB63130 come with a warranty?
Absolutely. The Mersen MPDB63130 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Mersen MPDB63130?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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