Cembre 2103030 A1-M3 non-insulated tin-plated copper ring terminal for 4–6 mm² copper conductors and M3 stud connections.
£0.59
The Cembre 2103030, also identified as the Cembre A1-M3, is a high-quality non-insulated copper ring terminal designed for secure termination of flexible and low-stranded copper conductors. As part of the established Cembre A-M series, it provides reliable electrical conductivity and mechanical strength for industrial wiring, control panels and electrical equipment.
Manufactured from high-purity electrolytic copper, the A1-M3 terminal is annealed to improve ductility and electrolytically tin plated to provide enhanced resistance to oxidation and corrosion. Its chamfered, funnel-shaped conductor entry helps guide cable strands into the barrel, while the inspection hole allows installers to confirm that the conductor has been inserted correctly before crimping.
Designed for 4–6 mm² copper conductors and an M3 fixing stud, the Cembre 2103030 is suitable for compact electrical connections where dependable performance and consistent crimp quality are essential. Its straight, single-hole palm and short-barrel construction make it ideal for switchgear, machinery, control cabinets and general industrial installations.
Ring terminals create a durable electrical connection by securing the terminal palm beneath a screw, stud or bolt. Unlike push-fit connections, the closed ring design remains captured by the fixing even if the screw becomes partially loosened, helping provide a dependable connection in equipment exposed to movement or vibration.
The Cembre A-M series is engineered to combine efficient electrical conductivity with strong mechanical retention. Correctly crimping the A1-M3 with a compatible tool permanently compresses the barrel around the conductor, producing a stable, low-resistance termination suitable for professional electrical installations.
| Series | A-M |
|---|---|
| Manufacturer part number | 2103030 |
| Product type | Non-insulated copper ring terminal |
| Conductor range | 4–6 mm² |
| Compatible conductor material | Copper |
| Stud size | M3 |
| Stud-hole diameter | 3.2 mm |
| Conductor entry diameter | 3.6 mm |
| Palm width | 7.5 mm |
| Overall length | 20.5 mm |
| Barrel length | 8 mm |
| Recommended stripping length | 9 mm |
| Material | High-purity electrolytic copper |
| Surface treatment | Electrolytic tin plating |
| Operating temperature | -50 to +150 °C |
| Number of fixing holes | 1 |
| Inspection hole | Yes |
| Crimping geometry | Hexagonal or indent |
| RoHS compliant | Yes |
| Minimum pack quantity | 100 pieces |
| HS Code | 85369010 |
| Country of Manufacture | Italy |
The Cembre 2103030 is used to create secure crimped ring connections on copper conductors in control panels, machinery, switchgear and other electrical equipment.
The A1-M3 is designed for flexible and low-stranded copper conductors with a cross-sectional area of 4–6 mm².
The terminal is designed for an M3 stud or screw and has an approximate fixing-hole diameter of 3.2 mm.
It is manufactured from high-purity electrolytic copper and finished with electrolytic tin plating to support reliable conductivity and corrosion resistance.
Yes. The barrel includes an inspection hole that allows the installer to verify that the conductor has been inserted to the correct position before crimping.
Cembre A-M series ring terminals are designed to provide electrical installers, panel builders and maintenance engineers with reliable conductivity, strong mechanical retention and consistent crimped connections.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...