Mersen MPDB69313 69313 Open-St...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$638.30
Mersen MPDB69313 69313 Open-Style Power Distribution Block, 620A/760A 3-Pole

Mersen MPDB69313 69313 Open-Style Power Distribution Block, 620A/760A 3-Pole

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Model: MPDB69313

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

$638.30
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Mersen 69313 Open-Style Power Distribution Block, 620A/760A 3-Pole

The Mersen 69313 open-style power distribution block delivers robust power distribution for high-current commercial and industrial electrical systems, rated 1000V AC/DC with a dual amperage rating of 620A for aluminum conductors and 760A for copper conductors. This UL 1953 certified 3-pole block features tin-plated aluminum connectors and a glass-filled polycarbonate insulating body, providing reliable, code-compliant power management for demanding installations.

Key Features

  • Dual Amperage Rating: 620A aluminum / 760A copper capacity provides flexible conductor options for diverse installation requirements.
  • 1000V AC/DC Rating: High voltage capability supports demanding commercial and industrial power distribution applications.
  • Durable Construction: Glass-filled polycarbonate insulating body delivers superior electrical isolation and mechanical durability.
  • Tin-Plated Aluminum Connectors: Corrosion-resistant box-style connectors maintain long-term electrical integrity and performance.
  • 3-Pole Configuration: Accommodates three-phase power systems with 2 primary and 4 secondary openings per pole.
  • Wire Range: Primary 500-#4 AWG and secondary 4/0-#6 AWG wire range accommodates a broad range of conductor sizes.
  • Short Circuit Rating: Up to 100 kA when used with appropriate fuse classes (CC, G, J, L, RK1, RK5, T); 10 kA standalone rating.

Certifications & Compliance

  • UL 1953 Certified
  • 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: 4
  • Rohs Compliant: Yes

Typical Applications

  • Commercial Power Distribution Systems
  • Industrial Electrical Panels
  • Manufacturing Facilities
  • Data Centers and Server Rooms
  • Healthcare Facilities
  • Educational Institutions

Why Mersen?

Mersen power distribution blocks combine UL 1953 certification with RoHS compliance, ensuring both safety and environmental responsibility. The glass-filled polycarbonate body and tin-plated aluminum connectors deliver long-term reliability in demanding electrical environments, backed by short circuit ratings up to 100 kA with appropriate fuse protection for code-compliant, professional power distribution.

Manufacturer Resources

Product Specs

Ac Or Dc:
AC/DC
Ampere Rating Al :
620 A
Ampere Rating Cu :
760 A
Body Insulating Material:
Glass Filled Polycarbonate
Connector Material:
Tin-plated Aluminum
Connector Type Primary :
Box
Connector Type Secondary :
Box
Frequency Hz :
50/60 Hz
Hex Screw Size Type Primary :
13/16-16 x 1.06
Hex Screw Size Type Secondary :
1/2-20 x .75
Hole Diameter Primary :
0.88 in
Hole Diameter Secondary :
0.56 in
Installation Mounting:
Direct Screw Mount
Number Of Openings Per Pole Primary :
2
Number Of Openings Per Pole Secondary :
4
Number Of Poles:
3-Pole
Product Height:
3.55 in
Product Length:
5.7 in
Product Weight:
5.4 lb
Product Width:
7.89 in
Rated Voltage Ac Ul:
1000 V
Rated Voltage Dc Ul:
1000 V
Rohs Compliant:
Yes
Short Circuit Rating Class Cc :
100 kA with 30A Fuse
Short Circuit Rating Class G :
100 kA with 60A Fuse
Short Circuit Rating Class J :
100 kA with 600A Fuse
Short Circuit Rating Class L :
100 kA with 800A Fuse
Short Circuit Rating Class Rk1 :
100 kA with 600A Fuse
Short Circuit Rating Class Rk5 :
100 kA with 600A Fuse
Short Circuit Rating Class T :
100 kA with 800A Fuse
Short Circuit Rating Standalone :
10 kA
Torque Rating Primary :
500-#4 500
Torque Rating Secondary :
4/0-#3 150; #4 100; #6 80
Wire Range Primary :
500-#4
Wire Range Secondary :
4/0-#6
Department:
Electrical
Product Group:
Wiring Devices
Product Type:
Power Distribution Block

Mersen MPDB69313 – Frequently Asked Questions

1) What wire sizes will the Mersen 69313 power distribution block accept on the line and load sides?
The Mersen 69313 takes 500 kcmil down to #4 AWG on the primary (line) side and 4/0 through #6 AWG on the secondary (load) side. Both sides use box-style connectors, with two openings per pole on the primary and four per pole on the secondary, so one feeder can be split to four branch conductors per phase. If your branch runs are larger than 4/0, this block won't land them.
2) Is the Mersen 69313 distribution block rated 620A or 760A?
Both, depending on what you land in it. The 69313 is rated 620 A with aluminum conductors and 760 A with copper. Size the block off the conductor material you are actually pulling, not the higher number on the label. Voltage rating is 1000 V AC and 1000 V DC, at 50/60 Hz.
3) What short circuit current rating can I use for the Mersen 69313 on my panel label?
Standalone, the 69313 carries a 10 kA short circuit rating. Protected by the right fuse it goes to 100 kA: Class CC at 30 A, Class G at 60 A, Class J at 600 A, Class RK1 at 600 A, Class RK5 at 600 A, Class L at 800 A, and Class T at 800 A. If your assembly needs a 100 kA SCCR, the upstream fuse class and amp rating have to match one of those lines. A breaker ahead of it does not buy you the 100 kA number.
4) What torque do I tighten the lugs to on a Mersen 69313 distribution block?
Primary lugs land at 500 in-lb across the full 500 kcmil to #4 range. On the secondary side it steps with conductor size: 150 in-lb for 4/0 through #3, 100 in-lb for #4, and 80 in-lb for #6. You will need a torque wrench that reaches those values, and the hardware is hex, 13/16-16 x 1.06 on the primary and 1/2-20 x .75 on the secondary.
5) How much space do I need in the enclosure for a Mersen 69313 power distribution block?
Plan for a footprint of 7.89 x 5.7 x 3.55 inches (width, length, height as Mersen states them) and 5.4 lb of weight on the mounting surface. It is an open-style block, so those are bare dimensions with no cover in the picture, and you still have to add the code-required air space and bending room for 500 kcmil primary conductors coming into the box lugs.
6) Can I land copper lugs on the Mersen 69313, or is it aluminum only?
Either one. The 69313 uses tin-plated aluminum connectors, which are dual-rated in practice for aluminum or copper conductors, and Mersen publishes both an aluminum ampacity (620 A) and a copper ampacity (760 A) for the block. The tin plating is what keeps the aluminum-to-copper interface from corroding.
7) Does the Mersen 69313 need a DIN rail or a mounting kit?
No rail and no adapter. The 69313 is a direct screw mount block, so it fastens straight to the panel or subpanel backplate through its own mounting holes. Provide your own fasteners sized to your backplate, and remember it is an open-style block, so a separate cover or a dead-front is on you if the installation calls for finger-safe protection.
8) Will the Mersen 69313 work on a 1000V DC solar or battery system, or is it AC only?
It is rated for both. The 69313 carries a 1000 V AC and a 1000 V DC UL rating, which covers PV combiner and DC bus work as well as 480Y/277 and 600 V three-phase AC. The block is 3-pole at 50/60 Hz. On a DC application you are using two of the three poles for the positive and negative runs.
9) How many circuits can I feed off one Mersen 69313?
Four per phase. The 69313 gives you two primary openings and four secondary openings on each of its three poles, so a single three-phase feeder in the primary side splits to four three-phase branch circuits out. Each of those branches has to sit within the 4/0 to #6 AWG secondary wire range, and the total load stays under 620 A on aluminum or 760 A on copper.
10) Is a Square D Linergy 9080LB a drop-in replacement for a Mersen 69313, or does the panel layout have to change?
Treat it as an electrical equivalent, not a mechanical one. The Square D Linergy 9080LB is a 3-pole power distribution block like the Mersen 69313, but the Mersen body measures 7.89 in wide by 5.7 in long by 3.55 in high and mounts by direct screw mount, so the existing mounting hole pattern and the clear space around it are what decide the swap. Measure the panel footprint and the wire-bending space before ordering, and match the Linergy catalog number to the 620A aluminum / 760A copper duty and 1000V rating the Mersen covers.
11) What size lug hole is on the Mersen 69313 if I'm using compression lugs instead of stripped wire?
Primary openings are 0.88 inch diameter and secondary openings are 0.56 inch. Those are box-style connectors taking bare conductor, so a two-hole compression lug is not what this block is built around. If your job requires terminating with lugs, that hole geometry and the 13/16-16 primary / 1/2-20 secondary hex hardware are the numbers to check against your lug barrel before you order.
How fast can I get the Mersen MPDB69313 delivered?
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Can I return it if it doesn’t work for me?
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Does the Mersen MPDB69313 come with a warranty?
Absolutely. The Mersen MPDB69313 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 MPDB69313?
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