HEX Bimetallic Aluminium-Copper Cable Lugs – Copper Palm, 10 to 630 sq mm and 4-Hole to 1300

HEX aluminium-copper bi-metal terminals (HBT) are used to connect aluminium cables to copper busbars. The barrel is aluminium, crimped onto the aluminium conductor; the palm is copper, bolted to the copper bar — so the aluminium-to-copper interface is made inside the lug, not at the bolted joint where it would corrode. Standard lugs run from 10 to 630 sq mm, and square four-hole palms from 500 to 1300 sq mm. HEX bimetallic lugs (500 sq mm) have been type-tested to AS/NZS 4325.1 and IEC 61238-1 by SIRIM QAS International, Malaysia. Made by HEX, the brand of Brass Copper & Alloy (I) Ltd., Mumbai — an ISO 9001 company whose products are tested by CPRI (India), UL (USA), KEMA (Netherlands) and SIRIM (Malaysia).

At a glance

• Use: aluminium cable to copper busbar
• Range: 10 to 630 sq mm (round palm); 500 to 1300 sq mm (square 4-hole palm)
• Stud holes: 11, 13 or 17 mm; square palms 4 × 11 or 4 × 13 mm
• Type tests: AS/NZS 4325.1 and IEC 61238-1 (500 sq mm, SIRIM QAS International)

Why a bimetallic lug

• No galvanic corrosion at the busbar — copper meets copper, aluminium meets aluminium.
• Standard and heavy sizes, including four-hole palms up to 1300 sq mm.
• Type-tested to AS/NZS 4325.1 and IEC 61238-1.
• Saves copper — lets you use aluminium cable on copper-busbar equipment.

Specifications

• Round palm (HBT): HBT 10-10, 16-10, 25-12, 35-12, 50-12, 70-12, 95-12, 120-12, 150-12, 185-12, 185-16, 240-12, 240-16, 300-12, 300-16, 400-16, 500-16, 630-16
• Aluminium barrel bore / OD: 5.7 / 14 mm (10 sq mm) to 32.5 / 44 mm (630 sq mm)
• Palm: width 20–50 mm, thickness 3–10 mm
• Square palm, 4 holes: HBT 500-4X10, 630-4X10 (60 × 60 mm, 4 × 11 mm); 800-4X10 (60 × 60 mm); 1000-4X10 (80 × 80 mm); 1300-4X12 (80 × 80 mm, 4 × 13 mm)
• Overall length: 76 mm (10 sq mm) to 260 mm (1300 sq mm)

Where it is used

• Aluminium feeders onto copper busbars in LT panels
• Transformer LV terminals with aluminium cables
• Solar and utility distribution with aluminium cable
• Retrofits replacing copper with aluminium cable

Which HEX aluminium termination do I need?

• Aluminium lugs and through connectors — general-purpose Al terminations, 16–300 sq mm.
• Long barrel Al lugs for XLPE — heavy duty, 25–1000 sq mm.
• DIN 46329 Al lugs — barrier design with oil stop, 25–500 sq mm.
• Sector lugs and ferrules — for 3- and 4-core sector-shaped conductors.
• Bimetallic lugs (this page) — aluminium cable onto copper busbar.
• Mechanical connectors — screw-clamp, no crimping tool needed.

Related products

• HEX bimetallic Al-Cu connectors
• HEX aluminium lugs
• HEX four-hole copper lugs

Frequently asked questions

What is a bimetallic lug used for?

To connect an aluminium cable to a copper busbar or terminal: the aluminium barrel is crimped on the cable and the copper palm is bolted to the copper bar.

Why not bolt an aluminium lug straight onto copper?

Aluminium and copper in direct contact corrode galvanically in the presence of moisture; a bimetallic lug moves that interface inside the lug.

Are four-hole bimetallic lugs available?

Yes — square-palm HBT lugs from 500 to 1300 sq mm with four holes.

How is it crimped?

Crimp the aluminium barrel with a tool and die for aluminium conductors of that size, from the palm end towards the barrel end.

Where can I buy HEX cable lugs in India?

From Jai Enterprises, which supplies HEX cable lugs, terminals and connectors across India from Bhilai and Raipur, Chhattisgarh. Call +91 9340081159 with the product codes or cable sizes and quantities.

How to order

Supplied by Jai Enterprises, despatched from Bhilai and Raipur, Chhattisgarh, to sites across India. To request a price, call +91 9340081159 or send an enquiry from this page with your quantity and site details, and we will confirm availability, lead time and the right model for the job.