Why Choose the Cembre 2161930 S2.5-M4 Ring Terminal?
The Cembre 2161930, also identified as S2.5-M4, is a premium uninsulated copper ring terminal engineered to provide secure, low-resistance electrical terminations for stranded copper conductors. Manufactured from high-purity electrolytic copper with a durable tin-plated finish, it is designed for demanding industrial, commercial and OEM electrical installations.
The closed ring design provides maximum mechanical security when installed onto an M4 stud or screw, making it ideal for applications exposed to vibration or repeated maintenance. The brazed seam barrel and knurled internal surface help produce a strong crimp with excellent electrical conductivity and long-term reliability.
Designed for 1.5–2.5 mm² copper conductors, the Cembre 2161930 is widely used by panel builders, maintenance engineers and electrical contractors for control panels, switchgear, machinery and power distribution equipment.
Key Advantages
- Professional uninsulated copper ring terminal.
- Suitable for 1.5–2.5 mm² stranded copper conductors.
- M4 ring provides a secure mechanical connection.
- Electrolytic tin-plated copper offers excellent conductivity and corrosion resistance.
- Brazed seam construction improves mechanical strength.
- Ideal for industrial control panels, machinery and electrical installations.
Key Features
- Cembre S2.5-M4 ring terminal.
- Manufacturer part number: 2161930.
- High-purity electrolytic copper construction.
- Minimum 3 μm electrolytic tin plating.
- Suitable for 1.5–2.5 mm² conductors.
- Compatible with M4 studs and screws.
- Knurled barrel for improved conductor grip.
- Crimp installation using a compatible crimping tool.
Reliable Ring Terminals for Industrial Electrical Systems
Ring terminals provide one of the most secure conductor termination methods for screw and stud connections. Their closed-ring construction prevents accidental disconnection while helping maintain a consistent electrical contact in environments subject to vibration or mechanical movement.
The Cembre S2.5-M4 is manufactured using annealed electrolytic copper and finished with high-quality tin plating to provide excellent conductivity, corrosion resistance and dependable long-term performance across a wide range of industrial applications.
Typical Applications
- Industrial control panels.
- Electrical switchboards.
- Machine and equipment wiring.
- Power distribution assemblies.
- HVAC and building services.
- Maintenance, repair and OEM manufacturing.
