Square D PQ I-Line Busway Fusi...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,179.46
Square D PQ I-Line Busway Fusible Plug-In Unit, 3-Pole

Square D PQ I-Line Busway Fusible Plug-In Unit, 3-Pole

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Model: PQ3603G

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

$2,179.46
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Square D PQ I-Line Busway Fusible Plug-In Unit, 3-Pole

The Square D PQ I-Line Busway Fusible Plug-In Unit is a 3-pole, fusible disconnect plug-in unit engineered for use with the I-Line busway system, part of a complete line of compatible sandwich-type feeder and plug-in busway lengths, fittings, and plug-in units. This unit connects via a plug-in connection and includes 3 fuses plus ground (3 fuse + G), accepting H, K, J, or R type fuses, with a rated operational voltage of 600V AC. This fusible plug-in unit is available across a Motor FLA range from 30A to 60A, giving contractors and panel builders flexibility to match protection to load requirements within a single coordinated I-Line family. Built for industrial and commercial power distribution, it is UL Listed and CSA Certified for code-compliant installation.

Key Features

  • Plug-In Connection: Mounts directly into I-Line busway for fast, tool-minimal installation and reconfiguration.
  • Fusible Disconnect: Accepts H, K, J, or R type fuses for flexible overcurrent protection selection.
  • 3-Pole, 3 Fuse + G Configuration: Delivers 3-phase power distribution with a dedicated ground busbar path.
  • Motor FLA Range: Offered in 30A and 60A Motor FLA ratings, allowing selection of the appropriate unit for the connected load.
  • Rated Operational Voltage: 600V AC operational rating suitable for demanding industrial and commercial feeder applications.
  • Family Compatibility: Part of a family of compatible straights, fittings, accessories, and plug-in units for flexible design choices within the I-Line busway system.
  • Fusible Range: Fusible plug-in units are available through 1200A within the I-Line range, allowing scalable feeder design.
  • Long Service Life: Rated for an average life duration of 20 years in continuous industrial and commercial service.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • ROHS Eur Compliant with Exemptions
  • Mercury Free

Technical Specifications

  • Voltage Rating: 600V
  • Number Of Poles: 3
  • Device Type: Busway & cable - LV busway
  • Motor FLA Range: 30A - 60A
  • Warranty: 18 months
  • Mercury Free: Yes
  • Country of Origin: MEX
  • Returnability: Yes

Typical Applications

  • Industrial Power Distribution Systems
  • Commercial Electrical Feeder Installations
  • I-Line Busway Runs Requiring Fusible Disconnects
  • Panel and Switchgear Feeder Tap-Offs
  • Contractor and Panel Builder Design Projects

Why Square D?

Square D I-Line busway plug-in units are built as part of a coordinated system of compatible straights, fittings, accessories, and plug-in units, giving contractors, panel builders, and system integrators flexible design choices without sacrificing compatibility. With UL and CSA certification, a 600V AC operational rating, a Motor FLA range spanning 30A to 60A, and an average life duration of 20 years, this fusible plug-in unit is engineered for reliable, code-compliant performance in demanding industrial and commercial electrical distribution systems.

Manufacturer Resources

Product Specs

Product Type:
Busway Plug-In Unit
Connection Type:
Plug-In
Voltage Rating:
600V
Listing:
UL Listed
Standards:
CSA
Country of Origin:
Mexico
Department:
Electrical
Product Group:
Power Distribution
Configuration:
3-Pole, 3 Fuse + G
Amperage Rating:
30A - 60A
Product Subgroup:
Safety Switches & Disconnects

Square D PQ3603G – Frequently Asked Questions

1) Will a Square D PQ3603G plug-in unit fit any busway, or only I-Line?
It plugs into Square D I-Line busway only. The PQ fusible plug-in units use the I-Line plug-in connection and are part of that coordinated system of straights, fittings, and accessories. If your run is a different manufacturer's or a different Square D busway family, this unit will not seat in it.
2) What amp sizes does the Square D PQ fusible plug-in unit come in?
Two sizes: a 30A unit (PQ3603G) and a 60A unit (PQ3606G). Both are 3-pole with 3 fuses plus ground. Larger taps are available within the I-Line fusible plug-in range up to 1200A, so if your feeder tap exceeds 60A you need a different unit in the family.
3) Are fuses included with the Square D I-Line fusible plug-in unit?
The unit is built as a fusible disconnect with three fuse positions plus a ground path, and it accepts Class H, K, J, or R fuses. Order the fuses separately, sized and classed for the load you are tapping. Fuse class matters mechanically, J and R bodies differ from H and K, so pick the class first and stay with it for future replacements.
4) Can I use this on a 480V three-phase industrial feeder?
Yes. The rated operational voltage is 600V AC, which covers 480V and 208/240V three-phase systems. It is a 3-pole device, so it switches all three phases, with a dedicated ground busbar path.
5) Is the Square D PQ plug-in unit acceptable for an inspected commercial installation in the US and Canada?
It is UL Listed and CSA Certified, so it can be installed on either side of the border on I-Line busway without a field evaluation. Country of origin is Mexico. It is also RoHS compliant with exemptions and mercury free, which covers the usual institutional procurement checklist.
6) Should I use a fusible plug-in unit or a circuit breaker plug-in unit on my busway tap?
A fusible unit like the PQ gives you the fuse class flexibility, H, K, J or R, so you can match let-through characteristics to the downstream equipment, and fuse replacement is cheap. A breaker plug-in resets instead of being replaced and is usually preferred where a maintenance crew needs to restore power without stocking fuses. Both plug into the same I-Line busway, so the choice is about how you want the tap protected and serviced, not about fit.
7) Can these plug-in units be relocated later if we rearrange equipment on the plant floor?
Yes, that is the point of the plug-in design. The unit mounts directly into an I-Line plug-in busway opening with minimal tooling and can be pulled and moved to another plug-in location on the run, which is why busway is used over conduit feeders in facilities whose layout changes.
8) Does the Square D PQ3606G need a separate ground conductor run to the load?
The unit is a 3 fuse plus ground configuration, so it carries a dedicated ground path from the busway ground bus through the unit. Your load side equipment grounding conductor terminates at the unit rather than requiring a separate bond back to the panel.
How fast can I get the Square D PQ3603G 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 Square D PQ3603G come with a warranty?
Absolutely. The Square D PQ3603G 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 Square D PQ3603G?
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
Why buy the Square D PQ3603G from ZenSupply?
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