Mersen MPDB69 Series Open-Styl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$662.60
Mersen MPDB69 Series Open-Style Power Distribution Block, 3-Pole, Tin-Plated

Mersen MPDB69 Series Open-Style Power Distribution Block, 3-Pole, Tin-Plated

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Model: MPDB69143

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

$662.60
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Mersen MPDB69143 Open-Style Power Distribution Block, 3-Pole 620A Tin-Plated Aluminum

The Mersen MPDB69143 open-style power distribution block delivers dependable high-current power distribution for demanding industrial and commercial electrical systems. This 3-pole distribution block is rated 620A copper and 1000V AC/DC, combining tin-plated aluminum connectors with a glass-filled polycarbonate insulating body for durable, code-compliant performance. UL 1953 listed with a 100 kA short circuit rating when properly fused, this block is engineered for multi-circuit power distribution applications requiring flexible wire range accommodation and organized three-phase connection management.

Key Features

  • 620A Copper Rating: High current capacity supports demanding electrical loads with reliable power distribution performance.
  • 1000V AC/DC Rating: Versatile voltage capability accommodates both AC and DC applications up to 1000V for flexible system integration.
  • 3-Pole Configuration: Three-pole design provides complete three-phase power distribution with organized connection management.
  • Tin-Plated Aluminum Connectors: Corrosion-resistant tin plating on the primary and secondary box connectors ensures long-term connection reliability and reduced maintenance requirements.
  • Glass-Filled Polycarbonate Body: High-strength insulating material provides excellent electrical isolation and mechanical durability.
  • Flexible Wire Range: Primary wire range of 350-#6 and secondary wire range of #4-#14 accommodate a variety of feeder and branch conductor sizes.
  • 100 kA Short Circuit Rating: High fault current capability with appropriate Class CC, G, J, L, RK1, RK5, or T fusing provides robust system protection.
  • Direct Screw Mount Installation: Simplifies mounting into panelboards and distribution enclosures.

Certifications & Compliance

  • UL 1953 Listed
  • RoHS Compliant

Technical Specifications

  • Connector Type Primary: Box
  • Connector Type Secondary: Box
  • Number Of Openings Per Pole Primary: 2
  • Number Of Openings Per Pole Secondary: 12
  • Rohs Compliant: Yes

Typical Applications

  • Industrial Power Distribution Systems
  • Commercial Electrical Panels
  • Manufacturing Facility Power Management
  • Data Center Power Distribution
  • Heavy Equipment Power Feeds
  • Multi-Circuit Distribution Applications

Why Mersen?

Mersen power distribution blocks combine proven engineering with UL 1953 listing and RoHS compliance for reliable electrical distribution solutions. The robust glass-filled polycarbonate construction and tin-plated aluminum connectors help ensure long-term performance in demanding professional applications, backed by a 100 kA short circuit rating when properly fused.

Manufacturer Resources

Product Specs

Body Insulating Material:
Glass Filled Polycarbonate
Rated Voltage Ac Ul:
1000 V
Short Circuit Rating Class L:
100 kA with 800A Fuse
Connector Type Primary:
Box
Frequency Hz:
50/60 Hz
Product Height:
3.55 in
Product Length:
5.7 in
Rohs Compliant:
Yes
Number Of Poles:
3-Pole
Short Circuit Rating Standalone:
10 kA
Short Circuit Rating Class Rk5:
100 kA with 600A Fuse
Ac Or Dc:
AC/DC
Product Weight:
5.4 lb
Product Width:
7.89 in
Short Circuit Rating Class Cc:
100 kA with 30A Fuse
Short Circuit Rating Class J:
100 kA with 600A Fuse
Number Of Openings Per Pole Primary:
2
Connector Type Secondary:
Box
Rated Voltage Dc Ul:
1000 V
Short Circuit Rating Class Rk1:
100 kA with 600A Fuse
Product Type:
Power Distribution Block
Installation Mounting:
Direct Screw Mount
Product Group:
Wiring Devices
Connector Material:
Tin-plated Aluminum
Department:
Electrical
Short Circuit Rating Class T:
100 kA with 800A Fuse
Short Circuit Rating Class G:
100 kA with 60A Fuse
Product Subgroup:
Power Distribution

Mersen MPDB69143 – Frequently Asked Questions

1) What wire sizes will the Mersen MPDB69 power distribution block accept on the line and load sides?
The MPDB69143 takes 350 kcmil down to #6 on the primary (line) side and #4 down to #14 on the secondary side. Both sides use box (set-screw) connectors, with 2 openings per pole on the primary and 12 openings per pole on the secondary, so one feeder pair per phase in and up to twelve branch conductors per phase out.
2) Can I use this Mersen block on a 600V or 1000V DC solar/battery circuit?
Yes. The MPDB69 series is rated 1000 V on both AC and DC under UL, and it is listed for AC/DC service at 50/60 Hz, so it covers 480V and 600V AC three-phase gear as well as DC bus work up to 1000V.
3) What short circuit current rating does this power distribution block have, and does it need to be fused?
Standalone, the MPDB69 block is rated 10 kA. To get the full 100 kA SCCR it has to be protected by the right upstream fuse: Class CC at 30A, Class G at 60A, Class J at 600A, Class RK1 or RK5 at 600A, or Class L or Class T at 800A. If your panel schedule calls for a 100 kA SCCR, the fuse class and amp rating ahead of the block is what gets you there.
4) How much space do I need in the enclosure for this distribution block, and how does it mount?
Plan on a footprint of 7.89 in wide by 5.7 in long with 3.55 in of height, and remember it is an open-style block, so you also need bending space and clearance to live parts inside the enclosure. It attaches by direct screw mount straight to the panel or enclosure back pan. It weighs 5.4 lb, so the mounting surface needs to be solid, not a thin cover plate.
5) What is the difference between the Mersen MPDB69143 and MPDB69313?
Ampacity. The MPDB69143 is the 620A block; the MPDB69313 is rated 620A/760A. Both are 3-pole open-style blocks in the same MPDB69 family, so pick by the feeder ampacity your drawing calls for.
6) Is an open-style power distribution block allowed where the block could be touched, or do I need a covered version?
An open-style block like the MPDB69 has exposed energized connectors, so it belongs inside a panelboard, switchboard or other enclosure that provides the dead-front protection. Where the block sits in an accessible space or in a location where personnel could contact it, you want a fully insulated or cover-equipped block instead, not this one.
7) Can I land aluminum conductors in the Mersen MPDB69 block?
The connectors themselves are tin-plated aluminum with a glass-filled polycarbonate insulating body, which is standard dual-rated construction for this class of block. Confirm the CU/AL marking stamped on the connector body against the conductor you are landing, and torque to the value marked on the block.
8) Is this Mersen block UL listed and RoHS compliant for a spec job?
It is UL 1953 Listed and RoHS compliant, which is what most industrial and institutional submittals ask for on a power distribution block.
9) Can one of these blocks feed twelve branch circuits off a single feeder?
Yes, that is what it is built for. With 12 secondary openings per pole and 2 primary openings per pole, one MPDB69 block takes the incoming three-phase feeder and splits it into as many as twelve taps per phase, which is why it shows up in manufacturing plant feeds, data center distribution and multi-circuit panel work. Each tap conductor still needs its own overcurrent protection per your design.
How fast can I get the Mersen MPDB69143 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 MPDB69143 come with a warranty?
Absolutely. The Mersen MPDB69143 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 MPDB69143?
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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