Product Description
The Square D D039 is a heavy-duty, single-conductor mechanical terminal lug designed for high-current applications in industrial and commercial power distribution. Precision-machined from high-strength aluminum, this lug provides a secure and reliable termination for a wide range of cable sizes, from 6 AWG up to 300 MCM.
Engineered for versatility, the D039 is AL7CU dual-rated, making it compatible with both copper and aluminum conductors. Its compact design and single-hole mounting pad make it an ideal choice for panelboards, busbars, and equipment disconnects where space and reliability are paramount.
Technical Specifications
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Manufacturer: Square D (Schneider Electric)
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Part Number: D039
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Type: Mechanical Terminal Lug (Solderless)
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Conductor Range: 300 MCM (kcmil) down to 6 AWG
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Number of Ports: 1 (Single Barrel)
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Mounting Holes: 1 Hole
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Stud/Bolt Size: 5/16" (0.3125")
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Material: High-Strength Aluminum Alloy
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Connection Type: 3/8" Hex Head Set Screw
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Rating: AL7CU Dual Rated (Copper & Aluminum)
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Temperature Rating: 75°C (Standard Application)
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Dimensions: 2.25" L x 1.00" W x 1.00" H
Key Features & Benefits
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Universal AL7CU Rating: Fully certified for use with both Copper (Cu) and Aluminum (Al) conductors, providing flexibility for diverse wiring requirements.
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Robust Mechanical Design: Features a heavy-duty 3/8" hex head screw that ensures high-pressure contact for a gas-tight electrical bond without the need for specialized crimping tools.
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High-Strength Aluminum: Constructed to withstand the mechanical and thermal stresses associated with large-gauge 300 MCM cabling.
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Compact Footprint: The small profile allows for installation in tight wiring gutters and compact enclosures without sacrificing electrical performance.
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Trusted Quality: As a genuine Square D component, this lug meets the rigorous safety and durability standards required for commercial electrical infrastructure.
Typical Applications
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Panelboards & Switchgear: Terminating feeder or branch circuit conductors.
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Busbar Connections: Securely mounting power taps to existing bus systems.
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Industrial Controls: Connecting large motor leads or primary power to control cabinets.
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Safety Disconnects: Providing reliable termination points for 300 MCM service cables.
