When to choose through-hole components in PCB design

Published on : 17 January 20244 min reading time

Delving into the world of Printed Circuit Board (PCB) design, one often faces the dilemma of selecting between through-hole and surface mount technologies. This choice isn’t always clear-cut, with each method offering distinct advantages under specific circumstances. This piece will shed light on the instances favoring the use of through-hole components in PCB design. First, the article will dissect the criteria that influence this decision. Then, the focus will shift towards the suitability of through-hole components in larger circuits with high power requirements.

Deciding on Through-Hole Components for PCB Design

Understanding the necessity of choosing through-hole components for PCB design requires a comprehensive process. The selection criteria are based on several factors, including the nature of the electronic device, the complexity of the circuits, and the power requirements.

Criteria for Choosing Through-Hole Components in PCBs

Through-hole components are typically chosen for designs requiring high power levels or larger size circuits. THT is favoured in such scenarios because of its strong physical bonds on the board, making them more suitable for enduring extreme accelerations, collisions, or high temperatures. For instance, an interactive webinar might illustrate the selection process, while an educational video could provide a visual representation of the component mounting process.

Through-Hole Components in High Power and Larger Size Circuits

In the case of high power and larger size circuits, through-hole components are often preferred over the surface mounting technique. The latter might be more space-efficient but lacks the robustness of THT components. A practical checklist could be employed to guide the choice between these two techniques, depending on the specific requirements of the PCB layout. A quick reference guide might offer further clarification on this topic.

Through-Hole Technology vs Surface Mount Technology in PCB Assembly

Within the realm of Printed Circuit Board (PCB) assembly, two notable technologies prevail: Through-Hole (THT) and Surface Mount (SMT). Each technique possesses distinct qualities, offering unique advantages and constraints. THT technology, for instance, involves inserting component leads into holes drilled on the PCB, while SMT involves mounting components directly onto the surface of the PCB.

Understanding the variances between these technologies contributes to more efficient design processes and enhanced performance in electronic devices. THT, despite being an older technique, remains a preferred choice for devices requiring stronger connections between layers. Any electronics exposed to significant environmental stress, or hefty mechanical loads, will benefit from THT’s robust lead-to-board connections.

Conversely, SMT stands out in compact, high-speed electronics. With components directly mounted on the PCB surface, SMT assembly allows for higher component density and simpler automation, fostering an escalation in production speed. An additional advantage lies in the dual-sided mounting capability, permitting components on both sides of the PCB.

Essential Factors to Consider When Using Through-Hole Components

When embarking on PCB design, a crucial decision lies in the selection of components. One option is through-hole components, which necessitate thoughtful consideration. These components, as the name suggests, are mounted by inserting leads into holes on the board. As a rule, these are used in the manufacturing process for their reliability and robustness.

Impact of Through-Hole Components on PCB Layout

Through-hole components significantly impact the PCB layout. Their larger size compared to their surface-mount counterparts can lead to a more complex layout process. This complexity stems from the need to accommodate the leads that pass through the holes and are then soldered onto the board. Moreover, they require a higher amount of heat for soldering, which can influence the choice of other electronic components of a circuit.

Time and Process of Soldering Through-Hole Components

The soldering process of through-hole components is more time-consuming when compared to surface-mount components. This is due to the requirement of more heat and individual placement of each component. Therefore, the time and resources invested in the assembly process must be considered when deciding to use through-hole components.