Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
2509979 Cembre 2A120-4ESI COPPER TERMINAL
Cembre 2509979 (2A120-4ESI) heavy-duty electrolytic copper transformer terminal for 630 mm² conductors with an extended barrel and electro-tinned finish.
£68.40
Why Choose the Cembre 2509979 2A120-4ESI Heavy-Duty Copper Transformer Terminal?
The Cembre 2509979, also identified as 2A120-4ESI, is a premium heavy-duty copper compression transformer terminal designed for terminating very large copper conductors in demanding industrial power distribution and utility applications. Manufactured from high-purity electrolytic copper with an electrolytic tin-plated finish, it delivers outstanding electrical conductivity, excellent corrosion resistance and long-term mechanical reliability.
Part of Cembre's proven 2A heavy-duty terminal range, this terminal incorporates an extended compression barrel without an inspection hole to maximise mechanical strength while preventing moisture ingress. The robust 4ESI transformer palm provides multiple fixing points for secure transformer and busbar connections where high-current performance is essential.
Designed for 630 mm² copper conductors, the 2A120-4ESI is ideally suited to transformers, substations, switchgear, industrial power distribution systems and medium-voltage installations up to 35 kV when installed using compatible Cembre compression tooling.
Key Advantages
- Heavy-duty electrolytic copper compression transformer terminal.
- Designed for 630 mm² copper conductors.
- Extended compression barrel provides excellent electrical and mechanical performance.
- No inspection hole helps prevent moisture and contaminant ingress.
- Electro-tinned finish offers excellent corrosion resistance.
- Ideal for transformers, switchgear, substations and industrial power distribution.
Key Features
- Manufacturer: Cembre
- Manufacturer Part Number: 2509979
- Alternative product code: 2A120-4ESI
- Heavy-duty 2A series copper transformer terminal.
- Suitable for 630 mm² copper conductors.
- Extended barrel with no inspection hole.
- Electro-tinned electrolytic copper construction.
- Compression crimp installation.
Reliable High-Current Transformer Connections
Heavy-duty copper transformer terminals are engineered to deliver low-resistance electrical connections while maintaining outstanding mechanical integrity under high-current operating conditions. Their extended barrel construction provides improved crimp performance and enhanced resistance to vibration, thermal cycling and mechanical loading.
The Cembre 2A range combines annealed electrolytic copper with electrolytic tin plating to provide dependable long-term performance in demanding indoor and outdoor electrical installations. The absence of an inspection hole further improves environmental protection by reducing moisture ingress into the crimped connection.
Typical Applications
- Power transformer connections.
- Industrial switchgear.
- Electrical substations.
- Busbar systems.
- Industrial power distribution equipment.
- Heavy-duty grounding and utility installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Number of Fixing Holes | 2 | |
|---|---|---|
| Conductor Size | 630 mm² | |
| Material | Copper | |
| Palm Angle | Straight (0°) | |
| Device Type | Copper Tube Lug | |
| Series | 2A Heavy Duty Copper Terminals | |
| Manufacturer Part Number | 2509979 | |
| Product type | Heavy-duty copper transformer terminal | |
| Conductor size | 630 mm² | |
| Terminal style | 4ESI transformer palm | |
| Material | High-purity electrolytic copper | |
| Surface finish | Electro-tinned | |
| Connection type | Compression crimp | |
| Inspection hole | None | |
| Typical applications | Transformers, substations, switchgear and industrial power distribution | |
| HS Code | 85369010 | |
| Country of Manufacture | United Kingdom (includes NI) |
Frequently Asked Questions
What is the Cembre 2509979 used for?
The Cembre 2509979 is a heavy-duty copper compression transformer terminal designed for terminating 630 mm² copper conductors in high-current industrial and utility electrical systems.
What is the alternative Cembre product reference?
The alternative product reference is 2A120-4ESI.
Why does this terminal use an extended barrel?
The extended compression barrel improves both electrical conductivity and mechanical strength while providing a more secure crimp for large conductors.
How is the terminal installed?
The conductor is inserted into the barrel and permanently secured using the appropriate Cembre compression crimping tool and matching dies before the palm is bolted to the equipment terminal.
Where is this terminal commonly installed?
Typical applications include transformers, substations, switchgear, busbar systems and industrial power distribution equipment.
Trusted by Electrical Professionals Worldwide
Cembre heavy-duty copper transformer terminals are trusted by electrical contractors, panel builders, OEMs and utility engineers for creating reliable, low-resistance conductor terminations in demanding industrial and power distribution applications.
