Cembre A3-U4 non-insulated electrolytic copper fork terminal for 16 mm² conductors with M4 fork opening and tin-plated finish for industrial electrical connections.
£0.69
The Cembre A3-U4 (2181990) is a premium-quality non-insulated copper fork terminal designed to provide secure, low-resistance electrical connections for industrial, commercial and OEM applications. Manufactured from high-purity electrolytic copper with a durable electrolytic tin-plated finish, it offers excellent electrical conductivity, corrosion resistance and long-term reliability in demanding electrical installations.
Designed for professional electricians, panel builders and machine manufacturers, the A3-U4 is suitable for 16 mm² copper conductors. Its open fork design allows quick installation and removal without fully removing the fixing screw, helping reduce maintenance time while maintaining a secure electrical connection.
Featuring an M4 fork opening, the Cembre 2181990 is ideal for switchgear, industrial control panels, power distribution equipment, machinery and automation systems requiring dependable bolted electrical terminations.
Fork terminals provide secure electrical connections while simplifying installation and maintenance. Their open-ended design allows equipment to be disconnected without completely removing the fixing screw, helping reduce servicing time while maintaining excellent electrical performance.
The Cembre A3-U4 is widely used in industrial control panels, switchgear, machine building, electrical distribution equipment and OEM assemblies where reliable bolted electrical connections are essential.
| Manufacturer Part Number | 2181990 |
|---|---|
| Product type | Non-insulated copper fork terminal |
| Conductor size | 16 mm² |
| Stud size | M4 |
| Terminal style | Fork / Spade |
| Material | 99.95% electrolytic copper |
| Surface finish | Electrolytic tin plated |
| Operating temperature | -50°C to +150°C |
| ETIM Classification | EC001052 |
| Pack quantity | 100 pieces |
| HS Code | 85369010 |
| Country of Manufacture | Italy |
It is designed for 16 mm² copper conductors.
The terminal is designed for M4 fixing studs.
It is manufactured from high-purity electrolytic copper with an electrolytic tin-plated finish for excellent conductivity and corrosion resistance.
Fork terminals allow faster installation and maintenance because they can be removed without completely removing the fixing screw.
It is commonly installed in industrial control panels, machinery, switchgear and power distribution equipment.
Cembre electrical termination products are trusted by panel builders, OEM manufacturers and electrical contractors worldwide for delivering reliable, standards-compliant electrical connections in demanding industrial environments.
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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...