Copper Long Barrel One Hole Compression Lug 250 MCM 1/4-inch Bolt Size
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SKU: 210-98074
146 in stock
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250 MCM Copper Long Barrel Compression Lug – 1/4" Stud | Conversions Tech
Conversions Tech copper long barrel compression lugs are engineered for superior electrical conductivity, mechanical strength, and long-term reliability. Designed for demanding power distribution applications, this 250 MCM compression lug features a seamless, electro-tin plated copper construction and a precision long barrel design that ensures maximum surface contact and secure crimping.
Ideal for industrial, commercial, renewable energy, EV infrastructure, and heavy-duty electrical systems, this lug delivers consistent performance under high current loads while offering excellent corrosion resistance for indoor and outdoor installations.
Key Features
- Premium Tin-Plated Copper: Seamless electro-tin plated copper provides excellent conductivity, corrosion resistance, and long service life.
- 250 MCM Conductor Compatibility: Designed specifically for large-gauge conductors used in high-current electrical applications.
- Long Barrel Design: Increased barrel length enhances crimp strength, electrical contact area, and mechanical retention.
- Low Electrical Resistance: Optimized copper composition minimizes power loss and heat buildup.
- High Ampacity: Rated up to 405A for reliable performance in demanding power systems.
- Corrosion Resistant: Tin plating protects against oxidation in harsh or outdoor environments.
- Industry Certified: UL Recognized, CE Certified, and RoHS compliant.
Applications
- Power distribution and switchgear
- Industrial electrical panels
- Renewable energy systems (solar & wind)
- EV charging infrastructure
- Commercial and utility installations
- Heavy-duty grounding and bonding systems
Technical Specifications
| Wire Size | 250 MCM |
| Stud Size | 1/4" Stud |
| Color Code | Yellow |
| Overall Length (L) | 67.3 mm (2.65") |
| Neck Length (L1) | 18.4 mm (0.72") |
| Outer Diameter (D) | 27.9 mm (1.10") |
| Inner Diameter (D1) | 19.1 mm (0.75") |
| Hole Diameter (D2) | 16.0 mm (0.63") |
| Width (B) | 40.0 mm (1.57") |
| Hole Spacing (E) | 7.1 mm (0.28") |
| Thickness (F) | 3.0 mm (0.11") |
| Terminal Material | Tin-Plated Copper |
| Temperature Rating | 90°C |
| Voltage Rating | 35 kV |
| Maximum Amp Rating | 405A |
| UL Recognized | Yes |
| CE Certified | Yes |
| RoHS Compliant | Yes |
Frequently Asked Questions (FAQs)
What is a long barrel compression lug?
A long barrel compression lug features an extended barrel length that allows for multiple crimp points, improving electrical conductivity and mechanical strength.
Is this lug compatible with aluminum wire?
No. This lug is designed specifically for copper conductors. For aluminum applications, a bi-metal or aluminum lug should be used.
Why is tin plating important?
Tin plating protects the copper from oxidation and corrosion, ensuring reliable performance in harsh or outdoor environments.
What crimping tool should be used?
A hydraulic or mechanical crimping tool rated for 250 MCM copper lugs should be used, following the recommended die size.
Is this lug UL listed?
Yes, this compression lug is UL Recognized and meets applicable industry safety standards.
Can this lug be used in outdoor installations?
Yes. The tin-plated copper construction makes it suitable for both indoor and outdoor applications.
What is the maximum current rating?
This lug supports a maximum ampacity of 405 amps when properly installed.
Is this lug compliant with RoHS requirements?
Yes, it is fully RoHS compliant and meets environmental safety regulations.
Does the color code indicate wire size?
Yes. The yellow color code corresponds to 250 MCM conductor size for quick identification.
Where are Conversions Tech compression lugs commonly used?
They are commonly used in power distribution panels, renewable energy systems, EV charging stations, industrial equipment, and utility installations.
4 Reasons Pros Buy Direct from Conversions Tech
, we design, test, and ship every product from inside the United States— “” quality without the big-box markup.
Our , mold, and QA station behind our weatherproof boxes, conduit bodies, and power inverters. , UL-listed safety, and up to 30 % lower cost than .
Need a torque spec or an OEM quote at dawn? You’ll speak directly with the Conversions Tech engineering desk—not a script reader—for instant answers, custom kitting, and private-label options.
Bottom line: For rugged, code-compliant electrical solutions shipped fast from a trusted U.S. source, choose Conversions Tech and build it right the first time.
