Cembre 2190150 A5-M8 non-insulated tin-plated copper compression ring terminal for terminating 25 mm² copper conductors onto M8 threaded studs.
£0.80
The Cembre 2190150, also designated as the Cembre A5-M8, is a professional non-insulated copper compression ring terminal designed to terminate 25 mm² copper conductors onto M8 threaded studs. Part of the established Cembre A-M ring terminal series, it provides a secure, low-resistance connection for industrial control panels, switchgear, machinery and electrical power-distribution equipment.
Manufactured from annealed electrolytic copper with a purity above 99.95%, the Cembre A5-M8 combines excellent electrical conductivity with the ductility required for reliable compression crimping. Its electrolytic tin-plated finish helps protect the copper against oxidation and mechanical stress, supporting dependable long-term performance in demanding electrical installations.
The Cembre 2190150 features an 8.4 mm fixing hole for M8 studs, a chamfered easy-entry barrel and an integrated inspection hole. These features simplify conductor insertion and allow installers to verify that the cable is fully positioned before crimping, helping produce consistent and mechanically secure terminations.
Compression ring terminals create a permanent electrical connection by mechanically compressing the copper barrel around the conductor strands. When correctly installed, the resulting joint provides excellent electrical continuity, high pull-out resistance and dependable operation under vibration, mechanical stress and thermal cycling.
The Cembre A-M series is designed for repeatable professional installation. When the A5-M8 is fitted using a compatible crimping tool and the correct die for a 25 mm² conductor, it creates a secure connection suitable for demanding electrical distribution, automation and machinery applications.
| Series | A-M Ring Terminals |
|---|---|
| Manufacturer part number | 2190150 |
| Product type | Non-insulated copper compression ring terminal |
| Conductor cross-section | 25 mm² |
| Approximate AWG equivalent | 4 AWG |
| Compatible conductor | Flexible and low-stranded copper conductor |
| Stud size | M8 |
| Fixing-hole diameter | 8.4 mm |
| Palm width | 15 mm |
| Dimension N | 8 mm |
| Dimension M | 9 mm |
| Dimension I | 28 mm |
| Overall length | 36 mm |
| Barrel length | 10.5 mm |
| Barrel internal diameter | 7 mm |
| Barrel external diameter | 9.3 mm |
| Cable stripping length | 12 mm |
| Connection angle | 180° / straight |
| Flange shape | Ring |
| Material | Annealed electrolytic copper |
| Copper purity | Greater than 99.95% |
| Surface treatment | Electrolytic tin plating |
| Crimping geometry | Hexagonal or indent |
| Inspection hole | Yes |
| Easy-insertion barrel | Yes |
| Number of fixing holes | 1 |
| Insulated | No |
| Minimum operating temperature | -50 °C |
| Maximum operating temperature | +150 °C |
| RoHS compliant | Yes |
| UL standard | UL 486A-486B |
| HS Code | 85369010 |
| Country of Manufacture | Italy |
The Cembre 2190150 is used to terminate 25 mm² copper conductors onto M8 threaded studs in industrial electrical equipment, switchgear and power-distribution systems.
The terminal is designed for 25 mm² flexible and low-stranded copper conductors, equivalent to approximately 4 AWG.
The terminal is designed for M8 studs and bolts and has a nominal fixing-hole diameter of 8.4 mm.
Yes. The barrel incorporates an inspection hole so the installer can confirm that the conductor has been inserted fully before crimping.
The conductor should be stripped to approximately 12 mm, inserted fully into the chamfered barrel and compressed using a compatible professional crimping tool with the correct die for a 25 mm² terminal.
Cembre A-M copper compression terminals are trusted by electrical contractors, panel builders, OEM manufacturers and maintenance engineers for secure, durable and electrically efficient cable connections.
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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...