Reliable Terminations Start with the Right Ferrule

How GLW ferrules support consistent, compliant connections in industrial control panels

On their own, ferrules might seem like a small, low-cost accessory, but for switchboard builders, OEMs, and industrial electricians, they’re critical for connection reliability, compliance, and professional workmanship.

The difference between a good connection and a great one often comes down to the small details. GLW ferrules are designed for precision, ensuring every termination across a control panel or machine build is consistent, reliable, and built to last.

Built for consistency and performance

In high-density control panels and electrical installations, reliability starts at the wire end. GLW ferrules gather the strands of fine-stranded conductors and permanently connect them through crimping, creating a stable, vibration-resistant connection in screw and spring terminals.

Each ferrule is made from high-purity, tin-plated copper for optimal conductivity and long-term corrosion protection. The form-fit moulded plastic collar, made from heat-stabilised, UL-registered polypropylene, ensures secure placement and easy handling during wiring.

Many GLW ferrules are UL certified, meeting international testing standards for safety and performance when used with the correct cable and crimping tool combination.

Precision fit, clean finish

GLW ferrules feature a conical collar geometry that guides the conductor smoothly into the sleeve and holds it firmly until crimping. The result is an efficient assembly process, reduced risk of strand damage, and a clean, professional finish across every termination.

Their DIN 46228-4 certified colour coding makes it easy to match the right ferrule to each conductor cross-section, ensuring fast and error-free identification.

Field insight: Many connection faults in control panels can be traced to inconsistencies in how ferrules are applied, not the product itself. Using ferrules from the same series, with matching cross-section tolerances and crimp geometry, can prevent micro-resistance points that lead to intermittent signal loss or heat build-up.

Compared with generic ferrules that may not follow DIN 46228-4 colour coding, GLW ferrules ensure consistent cross-section identification across wiring projects, helping prevent mismatched crimps and unnecessary rework.

Options for every application

GLW ferrules are available in a wide range of types, including:

• Uninsulated ferrules: Protect the ends of stranded wires in confined or non-visible areas

• Insulated ferrules: Prevent strand fraying and protect conductors from terminal damage

• GB ferrules: Designed for AWG wires with an enlarged insulating collar diameter

• XL ferrules: Suitable for short-circuit and earth-fault-proof cables, as well as PV cables

• Twin ferrules: Connect two wires of the same diameter into one secure termination

Available in numerous sizes and collar designs, GLW ferrules are suited to everything from control wiring to power distribution and machine or plant engineering.

Efficiency through precision

For switchboard builders, OEMs, and electricians, speed and accuracy are key. GLW ferrules enable secure and fast installation, even after multiple rewiring operations. They maintain low contact resistance, deliver enhanced vibration resistance, and ensure a safe, durable connection over the long term.

When paired with automatic or manual crimping tools, installers can achieve consistent, repeatable results that save time while ensuring professional quality on every termination.

The small detail that defines professional workmanship

GLW ferrules combine certified production, high-purity materials, and precise engineering to support safer, cleaner, and more durable electrical connections. As an indispensable component in electrical engineering, they provide the performance and reliability professionals depend on in every installation.

GLW Ferrules at Switches Plus Components

We stock a wide selection of GLW ferrules, available through our national distribution network for fast delivery across Australia. If you’re after a specific variant that isn’t listed, get in touch and we’ll help you find the right solution.