What are Terminal Blocks?
Terminal blocks are modular, insulated devices that are used to connect one or more wires, usually to a Printed Circuit Board (PCB). They may be either direct connection to a PCB or via a plug to allow reliable disconnection. They are available with various clamping mechanisms and provide a safe and organised method to connect cables and wires to electrical circuits.
Rapid stocks many hundreds of terminal block
products and it can be challenging to know where to start. Let’s look at these essential components and try to understand them a little.
Key Components
Terminal blocks are relatively simple components, usually consisting of 3 principle parts:
- Housing: Typically made from insulating materials like plastic.
- Clamping Mechanism: Holds the wires securely.
- Secondary Connection: Either direct or via a header to a PCB, or in the case of barrier strips or DIN rail terminal blocks, directly to a second cable clamp
Types of Terminal Blocks:
- PCB Terminal Blocks: Used to connect wires to PCB assemblies
- Pluggable Terminal Blocks: Also usually connecting wires to a PCB assembly, but allows the terminal block to be disconnected without disturbing the wiring.
- DIN Rail Terminal Blocks: Used to facilitate external wiring connection to wired devices mounted to DIN rail systems.
- Barrier Terminal Blocks: A type of direct connection terminal that features barriers between poles to prevent short circuits.
How to Pick the Right Terminal Block
Various attributes define a terminal block. These are key factors in matching the component to your application:
Pitch
Pitch is the distance between poles and ensures your selected terminal block will fit your PCB or application. Commonly metric and imperial sizes, but traditionally both are expressed in millimetres.
Current and Voltage Ratings
To ensure the terminal block can handle the electrical current and voltage requirements of your application.
Connection Type
Screw terminals may suit many users, and different clamping mechanisms are available, such as cheaper wire protector types, or ‘rising clamp’ types for uses where repeated disconnection or higher ratings may be necessary. Screwless, push-in or spring clamp types are also available. Most do not require tools to fit the cable which may save installation time.
Wire Size and Type
Check the wire gauge (AWG) and whether the wires are solid or stranded. The terminal block should accommodate the wire size you are using.
Number of Connections or ‘Poles’
Determine the number of connection points you need. Terminal blocks are available from 1 pole to up to 36 poles.
Mounting Orientation
Different options are available to connect wires that reach the PCB vertically, horizontally, or even 45 degrees. This makes installation easier and neater.
Standards and Certifications
Look for terminal blocks that comply with relevant standards (e.g., CE, UL, VDE) for safety and reliability.
Why Use TruConnect for Your Terminal Needs?
Rapid off TruConnect terminal blocks as an alternative to branded products. TruConnect offers a broad range of terminal block styles and types to meet your needs and save you money.
Quality and Reliability
- High Quality, Repeatable Manufacturing: TruConnect terminal blocks are manufactured with high precision to ensure consistent quality and reliability.
- Durable Materials: Made from high-quality materials that ensure longevity and performance even in demanding applications.
Wide Range of Products
- Variety: TruConnect offers a broad range of terminal blocks, catering to different requirements and preferences, in a variety of styles, pitches and pole sizes.
- Customisation: Availability of customisable options to fit specific application needs. Whether this be alternative colours, printing, or kitting.
Compliance
- Certifications: TruConnect products are compliant with international safety and quality standards, ensuring they meet the necessary regulatory requirements. All TruConnect terminal blocks are CE/ UKCA approved, most also carry UL and VDE approvals.
Cost-Effective Solutions
- Competitive Pricing: Offers high-quality products that represent alternatives to well-known brands at competitive prices, providing excellent value for money.
- Peace of Mind: Detailed production control and careful management of material supply ensure long-term product stability. This in turn ensures TruConnect terminal blocks represent a reliable long-term option for your product.
TruConnect stands out as a reliable choice due to its high-quality products, wide range of offerings, compliance with safety standards, user-friendly designs, and cost-effectiveness.
Rapid has extensive experience in manufacturing and supplying terminal blocks. Our in-house experts can assist you in choosing the best connection solution for your application. We provide accurate data, technical support, and stocking solutions to help you save both time and money. Contact sales@rapidonline.com for any queries you have, or to request more information.
