A Complete Guide to Using Entrelec Terminal Blocks for Aviation Wiring

Operational safety and system reliability are two paramount concerns in the realm of aviation, so the components that make up any electrical systems must meet the highest standards. One critical component that finds ample use within aviation electrical design is the terminal block, a small but vital part of any wiring infrastructure. Among the most trusted products for this category of components is the Entrelec product line from ABB, those of which have earned global recognition for their durability, adaptability, and high-performance within aviation settings.

This blog will serve as a comprehensive guide to understanding Entrelec terminal blocks, covering their most common types, unique features, and how they can be implemented to support aviation wiring applications effectively.

What Are Terminal Blocks?

Before diving into Entrelec-specific solutions, it is important to first understand what terminal blocks are and why they are essential in aviation electrical systems.

The Basic Purpose of Terminal Blocks

Also known as connection terminals or barrier strips, terminal blocks are modular, insulated devices that can be used to connect two or more wires together in a safe and organized manner. In this way, they serve as connection points for incoming and outgoing wires, facilitating:

• Secure electrical connections that promote the steady transmission of current.
• Safe isolation for protection between different circuits.
• Systematic wiring to facilitate easy installation, maintenance, and upgrades.

In space-limited applications that are common within aviation, high-performance terminal blocks prove crucial to system integrity and reliability.

Introducing Entrelec: A Trusted Industry Standard

Entrelec, now under ABB’s product umbrella, has long been a go-to solution for industrial and aviation-grade terminal blocks. Known for their innovative designs and consistent performance, Entrelec products are designed to withstand harsh environments, resist vibration, and ensure reliable electrical continuity.

Entrelec’s terminal block offerings generally cater to a wide array of wiring applications, including signal transmission, power distribution, grounding, and complex control systems.

Common Entrelec Terminal Block Types

Entrelec manufactures a broad range of terminal block solutions to meet various technical requirements. Below are some of the most commonly used types for aviation wiring assemblies.

Screw Clamp Terminal Blocks

These are the most traditional and widely used type, where wires are clamped in place using a screw and metal plate. These options are ideal for power distribution systems and beyond, offering simple installation, high vibration resistance, and strong contact pressure.

Spring Clamp Terminal Blocks

These terminal blocks provide a fast and tool-free wiring solution, where spring loaded mechanisms secure wiring. Spring clamp terminal blocks are suitable for signal wiring and environments where maintenance speed is critical, as they offer fast installation times alongside consistent clamping force and vibration tolerance.

Push-In Terminal Blocks

Push-on terminal blocks are designed for high-density wiring assemblies that are common in aircraft cabins or avionic systems, being easy-to-use and reliable in tight spaces. For installation, a wire is simply pushed into the terminal for a secure connection to be established. 

Ground Terminal Blocks

Critical for system grounding and circuit protection, ground terminal blocks provide a dedicated path to ground potential. This allows them to enhance safety and protect equipment from surges or faults, driving their use within engine control systems and electrical grounding frameworks.

Unique Features That Enhance Aviation Applications

Entrelec terminal blocks are specially designed with aviation and other high-demand industries in mind, with some standout features of these products including:

• High Resistance to Shock and Vibration: Many Entrelec terminal blocks are certified for environments that experience constant motion and extreme conditions.
• Compact and Modular Design: these terminal blocks are often ideal for aircraft that prioritize weight and space efficiency.
• Color-Coded and Numbered Options: Structured systems facilitate easier wiring and troubleshooting processes, which is beneficial for operations and maintenance.
• Tool-Free Maintenance: Several models allow for quick maintenance without tools, ideal for time-sensitive aviation settings.
• Wide Range of Accessories: Many terminal blocks include accessories like jumpers, end plates, and markers to allow customization of wiring layouts.

Shop Entrelec Terminal Blocks at Purchase Electromechanicals

For aviation professionals, MRO specialists, and procurement managers looking for trusted terminal block solutions, Purchase Electromechanicals serves as a one-stop shop for all needs. As a leading platform owned and operated by ASAP Semiconductor, Purchase Electromechanicals provides access to:

• A Wide Selection of Entrelec Products: Our stock includes screw clamp, spring clamp, push-in, and ground terminal blocks, among other in-demand options.
• Quality Assurance: Every part we carry is sourced from vetted manufacturers and undergoes rigorous inspection protocols as necessary.
• Rapid Fulfillment: With a global supply chain and efficient logistics, orders are shipped promptly to meet pressing demand.
• Customer-Centric Support: Expert representatives are always available to assist with product selection, quotes, and sourcing solutions for your benefit.

Backed by ASAP Semiconductor’s global network and commitment to excellence, you can shop with confidence knowing your procurement is in the right hands. With this in mind, kick off procurement on our website today!