{"id":1511,"date":"2026-04-07T15:57:42","date_gmt":"2026-04-07T07:57:42","guid":{"rendered":"https:\/\/wellspcba.com\/?p=1511"},"modified":"2026-04-07T15:57:44","modified_gmt":"2026-04-07T07:57:44","slug":"tht-assembly-process","status":"publish","type":"post","link":"https:\/\/wellspcba.com\/es\/tht-assembly-process\/","title":{"rendered":"The Ultimate Guide to THT Assembly Process: Ensuring Reliability in Heavy-Duty Electronics"},"content":{"rendered":"

In the era of miniaturization dominated by Surface Mount Technology (SMT), Through-Hole Technology (THT)<\/strong> remains a cornerstone for industries requiring maximum mechanical strength and high-power handling. Whether you are developing industrial controllers or aerospace power systems, understanding the THT assembly process<\/strong> is critical for ensuring product longevity.<\/p>\n\n\n\n

At Wells<\/a>, we combine decades of expertise in both SMT and THT to deliver robust electronic solutions. In this guide, we\u2019ll dive deep into the technical steps, benefits, and design considerations of the THT process.<\/p>\n\n\n

What is THT Assembly?<\/h2>\n\n\n

Through-Hole Technology (THT)<\/strong> involves inserting electronic component leads into pre-drilled holes on a printed circuit board (PCB) and soldering them on the opposite side. Unlike SMT, where components are mounted on the surface, THT creates a physical bond that penetrates the board.<\/p>\n\n\n\n

For a broader perspective on how this fits into the overall production cycle, check out our comprehensive PCBA manufacturing guide<\/a>.<\/p>\n\n\n

The Step-by-Step THT Assembly Process<\/h2>\n\n\n

The reliability of a THT joint depends on a precise, multi-stage workflow. Here is how professional manufacturers like Wells PCBA manage the process:<\/p>\n\n\n\n

\"Step-by-step<\/figure>\n\n\n

1. Component Preparation & Pre-forming<\/h3>\n\n\n

Before assembly, component leads must be bent and trimmed to fit the specific pitch of the PCB holes. This ensures that components sit flush against the board and prevents stress on the solder joints.<\/p>\n\n\n

2. Component Placement<\/h3>\n\n\n

While high-volume SMT uses high-speed pick-and-place machines (as detailed in our RK3588 SMT assembly guide<\/a>), THT placement is often a hybrid of manual and automated insertion (AI). Skilled technicians place bulkier components like transformers and large capacitors by hand to ensure perfect alignment.<\/p>\n\n\n

3. Soldering: Wave vs. Manual<\/h3>\n\n\n

This is the most critical stage of the THT assembly process<\/strong>.<\/p>\n\n\n\n