Description
WIN CC Bi-Metal Lug (SQ) MCCB Welded Cable Terminal (16mm² to 400mm²) Copper-Aluminum Excellent Connector with High Reliability Transition
The CC Bi-Metal Lug (SQ) MCCB Type Series (CC-DTL-F) provides an essential transition interface for connecting aluminum cables to copper terminals, busbars, and Molded Case Circuit Breakers (MCCBs).
Standard direct physical contact between aluminum and copper can induce galvanic corrosion, thermal degradation, and contact resistance.
The CC-DTL-F series solves this by joining high-purity electrical aluminum with an ETP copper palm using advanced friction-welding technology to deliver a solid molecular bond.
Designed specifically with a square (SQ) palm geometry matching MCCB breaker connection posts and distribution board terminals, these bimetallic lugs ensure a clean, flush fit in tight spaces.
The aluminum barrel receives the stripped aluminum conductor for crimping, while the solid copper palm bolts securely to equipment terminals without risking bimetallic corrosion.
The CC-DTL-F product line covers conductor sizes from 16mm² up to 400mm² with precise hole dimensions to ensure reliable bolt alignment:
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Light to Medium Sizes (16mm² to 35mm² / Ø8mm Hole): Supplied in boxes of 90 pieces for standard light industrial distribution feeds.
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Intermediate Sizes (50mm² to 95mm² / Ø10mm Hole): Supplied in boxes of 40 pieces for commercial switchboards and main incoming feeds.
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Heavy-Duty Sizes (120mm² to 400mm² / Ø12mm Hole): Available in bulk box quantities of 30, 20, 12, or 9 pieces for major power infrastructure and MCCB terminations.
By mitigating micro-movements, creep, and oxidation, the CC-DTL-F series helps maintain reliable electrical conductivity in main distribution boards and industrial control panels
Product Details :
| Type | Size | Packing | P ± 0.3 | D ± 0.3 | d ± 0.3 | L ± 0.3 | L1 ± 0.3 | W ± 0.3 | S ± 0.3 |
| CC-DTL-F-16-8 | 16mm | 90pcs/box | Φ 8 | Φ 16 | Φ 5.5 | 87 | 43 | 14 | 4 |
| CC-DTL-F-25-8 | 25mm | 90pcs/box | Φ 8 | Φ 16 | Φ 7 | 87 | 43 | 14 | 4 |
| CC-DTL-F-35-8 | 35mm | 90pcs/box | Φ 8 | Φ 16 | Φ 8.5 | 87 | 43 | 14 | 4 |
| CC-DTL-F-50-10 | 50mm | 40pcs/box | Φ 10 | Φ 20 | Φ 10 | 100 | 50 | 17 | 5 |
| CC-DTL-F-70-10 | 70mm | 40pcs/box | Φ 10 | Φ 20 | Φ 11.5 | 100 | 50 | 17 | 5 |
| CC-DTL-F-95-10 | 95mm | 40pcs/box | Φ 10 | Φ 20 | Φ 13.5 | 100 | 50 | 17 | 5 |
| CC-DTL-F-120-12 | 120mm | 30pcs/box | Φ 12 | Φ 25 | Φ 15 | 120 | 63 | 21 | 6.2 |
| CC-DTL-F-150-12 | 150mm | 30pcs/box | Φ 12 | Φ 25 | Φ 16.5 | 120 | 63 | 21 | 6.2 |
| CC-DTL-F-185-12 | 185mm | 20pcs/box | Φ 12 | Φ 32 | Φ 18.5 | 122 | 60 | 25 | 7.2 |
| CC-DTL-F-240-12 | 240mm | 20pcs/box | Φ 12 | Φ 32 | Φ 20 | 122 | 60 | 25 | 7.2 |
| CC-DTL-F-300-12 | 300mm | 12pcs/box | Φ 12 | Φ 34 | Φ 23.5 | 145 | 65 | 30 | 8 |
| CC-DTL-F-400-12 | 400mm | 9pcs/box | Φ 12 | Φ 40 | Φ 26 | 150 | 70 | 32 | 8 |
Frequently Asked Questions (FAQ)
Q1: Why is a bi-metal lug necessary when connecting aluminum cable to copper terminals?
A : Directly connecting copper and aluminum creates galvanic corrosion, leading to joint degradation and high electrical resistance. A friction-welded bi-metal lug ensures the aluminum cable contacts the aluminum barrel, while the copper palm bolts safely to copper equipment terminals.
Q2: What does “MCCB Type” or “SQ” mean for this series?
A : “SQ” stands for Square Palm design. The narrower, straight-edged square palm is specially shaped to fit inside the compact connection terminal barriers of Molded Case Circuit Breakers (MCCBs) without overlapping adjacent phase dividers.
Q3: How are the copper palm and aluminum barrel joined together?
A : They are joined via friction welding, a process that spins and presses the two metals together to create a solid-state molecular bond without melting.
Q4: How do I select the right order code for my installation?
A : Match your aluminum conductor’s cross-sectional area to the order code’s size designation. For example, a 120mm² cable requires model CC-DTL-F-120-12, which accepts a 120mm² wire inside its Ø 15.0mm inner barrel and fits an M12 terminal bolt.
Q5: Should conductive contact grease be used inside the aluminum barrel during crimping?
A : Yes, applying jointing compound or anti-oxidation contact grease inside the aluminum barrel before crimping breaks down the aluminum oxide layer and prevents air or moisture ingress for lower contact resistance.
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