Cembre 2330390 A40-M20 tinned copper compression ring terminal for 185 mm² Class 5 and Class 6 ultra-flexible copper conductors with an M20 fixing hole.
£14.55
The Cembre 2330390 A40-M20 is a professional copper compression ring terminal designed for the secure termination of large, ultra-flexible copper conductors. Part of the Cembre A-M series, it provides a dependable, low-resistance connection for high-current electrical equipment, switchgear, control panels and industrial power distribution systems.
Manufactured from electrolytic copper with a purity above 99.95%, the terminal is annealed to improve ductility and resistance to mechanical stress during compression. Its electrolytically tin-plated finish protects the copper against oxidation and corrosion, helping preserve reliable electrical performance throughout the life of the installation.
The A40-M20 is designed for 185 mm² Class 5 and Class 6 flexible copper conductors and features an M20 fixing hole. A chamfered barrel entry helps guide fine conductor strands into the terminal, while the integrated inspection hole allows installers to confirm full conductor insertion before crimping.
Ultra-flexible conductors contain a large number of fine copper strands and require terminals with barrel dimensions specifically engineered for their construction. The Cembre A40-M20 accommodates these conductors while providing excellent conductivity, mechanical pull-out strength and dependable performance in installations exposed to vibration or frequent load changes.
When installed using compatible Cembre crimping tools and dies, the terminal produces a controlled and repeatable compression connection. Its chamfered entry helps prevent fine strands from spreading or becoming damaged during insertion, while the inspection hole provides a clear visual check before the crimping operation begins.
| Series | A-M Ring Terminals |
|---|---|
| Manufacturer part number | 2330390 |
| Product type | Copper compression ring terminal |
| Nominal conductor size | 185 mm² |
| Compatible conductor classes | Class 5 and Class 6 flexible copper |
| Stud size | M20 |
| Fixing-hole diameter | 21 mm |
| Palm width | 37.5 mm |
| Overall length | 91 mm |
| Barrel length | 38 mm |
| Cable stripping length | approximately 38 mm |
| Internal barrel diameter | 21 mm |
| External barrel diameter | 25.5 mm |
| Terminal material | Annealed electrolytic copper |
| Surface finish | Electrolytic tin plating |
| Inspection hole | Yes |
| Barrel entry | Chamfered |
| Crimping geometry | Hexagonal or indent |
| Operating temperature | -50°C to +150°C |
| HS Code | 85369010 |
| Country of Manufacture | Italy |
The Cembre 2330390 is used to terminate a 185 mm² ultra-flexible copper conductor onto electrical equipment with an M20 fixing point.
The manufacturer model designation for Cembre part number 2330390 is A40-M20.
The terminal is designed for 185 mm² Class 5 and Class 6 flexible copper conductors.
The A40-M20 features a 21 mm fixing hole designed for installation onto an M20 stud.
The electrolytic tin-plated finish helps protect the copper against oxidation and corrosion while maintaining dependable electrical conductivity.
Cembre A-M compression terminals are trusted by panel builders, electrical contractors and industrial engineers for reliable termination of ultra-flexible copper conductors in demanding power applications.
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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...