What Is a PCBA – And Why A Squared Technologies Limited Is Your Best Choice
When people think of electronics, they often imagine the finished gadget — the phone in their hand, the control panel on a piece of equipment, or the circuit board inside a device. But behind all of those, there’s a crucial step in manufacturing that often goes overlooked: Printed Circuit Board Assembly (PCBA).
At A Squared Technologies Limited, we specialise in providing high-quality PCB assembly services—right here in Somerset, with the kind of personal service and attention to detail only a family-run company can offer.
What Is a PCBA?
A Printed Circuit Board Assembly (PCBA) is a PCB that’s been populated with electronic components such as resistors, capacitors, integrated circuits, and connectors. Once assembled, the board becomes the functional engine behind most electronic devices.
Without the assembly stage, a PCB is just a skeleton. It’s the components and connections that give it life — and that’s where A Squared Technologies comes in.
The PCBA Process – What Actually Happens?
Producing a reliable PCBA involves a number of carefully controlled steps. Here’s a behind-the-scenes look at how we turn your design into a working product.
Sourcing Components
Before assembly begins, we:
- Review the BOM (Bill of Materials) to identify all parts needed.
- Source components from trusted suppliers to ensure quality and compatibility.
- Offer component alternatives if any items are end-of-life, long lead time, or hard to find.
We manage component procurement in-house to keep the process smooth and transparent for you.
Solder Paste Application (for SMT)
For Surface Mount Technology (SMT) assemblies:
- A solder paste stencil is aligned with the PCB.
- Solder paste (a mix of tiny solder particles and flux) is applied precisely where components will be placed.
- Interim inspections under the microscope allow for consistent and accurate printing
- This step ensures strong, clean connections once components are soldered.
Surface Mount Pick and Place Machines
Automated pick-and-place machines:
- Accurately place surface-mount components onto the board at high speed.
- Use CAD files and reference points from your design to ensure perfect alignment.
At A Squared, we operate three UK-built and serviced pick-and-place machines, backed by direct local support. This setup not only gives us the capacity to handle high-volume production runs, but also ensures we can respond quickly to any technical issues, keeping your project on schedule without compromising quality.
Reflow Soldering – Conventional & Vapor Phase Options
After components are placed, the PCB goes through the reflow soldering process, where the solder paste is melted to form permanent electrical and mechanical connections.
At A Squared Technologies, we offer two reflow soldering options to suit different application needs:
- The board is passed through a controlled heat zone, gradually increasing the temperature to melt the solder.
- A carefully managed temperature profile ensures safe heating for all components.
- The board is then gradually cooled, solidifying strong and consistent joints.
- Ideal for standard applications where efficiency and throughput are key.
- Uses a specialised liquid that vaporises at a fixed temperature to uniformly heat the entire board.
- As the vapor condenses on the PCB, it evenly transfers heat—no hotspots, no overheating.
- Ensures gentle handling of sensitive, high-density, or thermally critical components.
- Reduces the risk of cold solder joints and component warping.
- Particularly well-suited to high-reliability applications where absolute consistency is essential.
Whether your project requires standard reflow or the precision of vapor phase soldering, we apply the right method to ensure optimal results.
Through-Hole Component Insertion (if required)
Some assemblies require Through-Hole Technology (THT) for larger or more robust components:
- Components are manually inserted into holes in the board.
- Soldered using wave soldering or by hand by our IPC certified specialists, depending on the design.
This hybrid approach (SMT + THT) is common in industrial and high-power applications.
Inspection and Quality Control
Every board is subjected to strict inspection procedures and following the IPC guidelines:
- Manual inspection by our experienced technicians.
- Twice daily quality checks
- Functional testing and in-circuit testing available where required, to verify operation before delivery.
As a family-run business, we take pride in our reputation — and that means no board leaves our workshop without passing our quality checks.
Final Assembly, Programming, and Packaging
We can also support:
- Conformal coating or potting for moisture or environmental protection.
- Firmware flashing and initial programming of microcontrollers or embedded systems.
- Final product assembly and packaging if required for shipment to end-users or distributors.
This “box build” service helps streamline your production line and reduce logistics costs.
Why Choose A Squared Technologies Limited?
Here’s what makes us the best choice for your PCBA needs:
Full Turnkey or Consignment Options
Whether you need a complete turnkey solution (we handle everything) or want to provide your own components, we’re flexible.
Local Service with Fast Turnaround:
We’re based in Somerset, UK so that means:
-Shorter lead times
-No import headaches
-Clear, direct communication with the people building your boards
Trusted by Engineers and Entrepreneurs Alike
From local startups prototyping new tech to established OEMs scaling production, we support a wide range of industries and project sizes.
Let’s Build Your Next Project — Together
Whether you need a one-off prototype or hundreds of production-ready units, we’ve got the tools, the team, and the experience to deliver.