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2161930 Cembre S2.5-M4 RING TERMINAL
Cembre 2161930 S2.5-M4 uninsulated copper ring terminal for 1.5–2.5 mm² conductors with M4 stud connection.
£0.1268
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.
Technical Specifications
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| Connection Orientation | Straight | |
|---|---|---|
| Stud Size | M4 | |
| Device Type | Ring Terminal | |
| Conductor Size | 1.5–2.5 mm² | |
| Insulation Type | Non-insulated | |
| Series | S Series Uninsulated Ring Terminals | |
| Product code | 2161930 | |
| Product type | Uninsulated copper ring terminal | |
| Conductor size | 1.5–2.5 mm² | |
| Stud / screw size | M4 | |
| Material | Electrolytic copper | |
| Surface finish | Electrolytic tin plated | |
| Termination method | Crimp | |
| Operating temperature | -50°C to +150°C | |
| Cable stripping length | Approx. 4.6 mm | |
| Packaging | Box of 100 pieces | |
| HS Code | 85369010 | |
| Country of Manufacture | Italy |
Frequently Asked Questions
What is the Cembre 2161930 used for?
The Cembre 2161930 is used to terminate 1.5–2.5 mm² stranded copper conductors onto M4 stud or screw connections in industrial electrical systems.
What is the Cembre reference for product 2161930?
The corresponding Cembre catalogue reference is S2.5-M4.
What cable size is suitable for this ring terminal?
This terminal is designed for stranded copper conductors with cross-sectional areas from 1.5 mm² to 2.5 mm².
What material is the terminal manufactured from?
It is manufactured from high-purity electrolytic copper with a corrosion-resistant electrolytic tin-plated finish.
How is the Cembre 2161930 installed?
The conductor is stripped, inserted into the barrel and crimped using a suitable crimping tool before fastening the ring onto an M4 stud or terminal screw.
Trusted by Electrical Professionals Worldwide
Cembre electrical connectors are trusted worldwide by panel builders, automation engineers and electrical contractors for delivering safe, durable and high-performance conductor terminations.
