If you’ve ever worked on a PCB assembly line, chances are you’ve come across PCB terminals—those small, often overlooked components that act as the critical link between a circuit board and external wiring, sensors, or power sources. As a supplier who’s worked directly with design engineers, production managers, and contract assemblers for over a decade, one of the most common questions I get from new clients and industry peers is straightforward: “Are PCB terminals available in both surface-mount and through-hole types?” The short answer is yes, but the nuance behind that answer is what matters most for anyone building electronics, scaling production, or sourcing reliable components. Pcb Terminals
Let’s start with the basics to set context: PCB terminals are connectors designed to terminate a wire or cable to a printed circuit board, eliminating messy hand-soldering of bare wires and reducing the risk of loose connections that can cause device failure. Their design is tailored to balance mechanical stability, electrical performance, and ease of assembly, which is why manufacturers developed two primary formats to fit different production workflows.
First, surface-mount PCB terminals (often abbreviated as SMT terminals) emerged as the electronics industry shifted toward miniaturization in the early 2000s. Unlike through-hole components, which require leads inserted through holes drilled into the PCB and soldered on the opposite side, surface-mount components mount directly to the PCB’s surface. For terminals, this translates to small, compact designs that sit flat against the board, making them ideal for space-constrained devices like smartphones, wearables, compact medical sensors, and automotive infotainment modules—products where every millimeter counts. Over the years, we’ve refined our SMT terminal offerings to address common pain points: early SMT terminals were often too fragile to support frequent wire insertion/removal, or had low current ratings that limited their use in power-sensitive applications. Today’s models, by contrast, feature reinforced solder pads, integrated retention clips for wires, and current ratings ranging from 2A to 20A, enough for most consumer and industrial low-power devices.
Then there are through-hole PCB terminals, the original format that’s been a staple of PCB assembly lines since the 1960s. These terminals have solid, metal leads that pass through plated-through holes (PTH) in the board, creating a mechanical and electrical bond that’s far more rigid than surface-mount alternatives. That rigidity makes through-hole terminals the go-to for applications where vibration or physical stress is a concern—think industrial control panels, automotive wiring harnesses, outdoor power equipment, and heavy machinery. Our through-hole lines include options for both single-wire and multi-wire connections, with current ratings up to 50A, and we’ve standardized lead diameters to fit common wire gauges from 22AWG up to 10AWG. For production teams, through-hole terminals also offer a benefit for manual assembly: if a connection is missed or damaged during initial soldering, it’s far easier to rework a through-hole terminal on the production line than a surface-mount one, which can be more prone to lifting pads if heated too aggressively.
A common misconception here is that surface-mount terminals are only for low-power, low-stress devices and through-hole are only for high-power, industrial uses. While that’s true for many applications, there’s overlap that depends on a designer’s specific needs. For example, a power tool manufacturer might use through-hole terminals for the main power input, which carries 30A of current and is subject to constant vibration, but use SMT terminals for smaller low-voltage sensors on the tool’s control board. Similarly, a consumer electronics brand might choose SMT for a portable speaker’s battery terminals, but opt for through-hole for the AC power input, which sees repeated plugging and unplugging. As a supplier, we work closely with clients to map their use case to the right format, rather than pushing a one-size-fits-all solution.
Another point to clarify: not all PCB terminals are created equal in terms of compatibility. Some designs are exclusive to surface-mount layouts, with thin, flat solder pads that conform to SMT stencil printing and reflow soldering processes. Others are strictly through-hole, with long, axial leads that can’t be properly aligned with a PCB’s solder mask during SMT assembly. There are also hybrid options, a newer development that combines elements of both formats: these terminals have a base that mounts to the surface of the PCB, but one or two through-hole leads for extra mechanical stability. These hybrids have grown in popularity in recent years, bridging the gap between miniaturization (the core benefit of SMT) and the durability of through-hole, which makes them ideal for mid-power automotive components like ADAS sensors, where space is tight but vibration resistance is non-negotiable.
If you’re a design engineer reading this, you’re probably wondering how to choose between surface-mount, through-hole, or hybrid terminals for your next project. Here are the factors we recommend prioritizing: first, board space. If you’re working on a dense, miniaturized layout, surface-mount is the only feasible option. Second, mechanical stress. If your device will be exposed to frequent vibration, rough handling, or repeated wire insertion/removal, through-hole or hybrid will outperform SMT. Third, current and voltage requirements. Higher-power applications (over 20A) almost always call for through-hole terminals, as their larger solder interfaces and through-hole connections dissipate heat far better than surface-mount pads, reducing the risk of thermal breakdown. Fourth, production volume. For high-volume runs (10,000+ units), surface-mount terminals integrate seamlessly with automated pick-and-place lines, cutting assembly time and cost per unit. For low-to-medium volume runs, where manual assembly is common, through-hole terminals are often faster to install and rework, reducing line downtime.
As a supplier, we’ve seen the industry evolve alongside these terminal formats. Five years ago, most clients came to us asking for either surface-mount for consumer goods or through-hole for industrial use; today, 60% of our inquiries include a mix of formats, reflecting the shift toward more integrated, compact devices that require flexibility in component design. We’ve invested in testing and quality control to ensure both our SMT and through-hole terminals meet international standards: our products are RoHS-compliant, UL-listed, and undergo 1,000+ wire insertion/removal cycles to ensure long-term reliability, a key feature that many smaller suppliers skip over.
If you’re currently sourcing PCB terminals for your project, or if you’re designing a new device and want to confirm the right format for your needs, our team is here to help. We can provide free sample kits for both surface-mount and through-hole styles, conduct custom testing for your specific application requirements, and offer competitive pricing for both low and high volume orders. Don’t hesitate to reach out to our team to discuss your project details and find the best terminal solution for your needs.
1.80mm Pitch Connectors Reference
IPC-2221, Generic Standard on Printed Board Design
IEC 60352, Solderless connections for wires and components on printed boards
UL 1059, Standard for Safety for Terminal Blocks and Other Connectors for Use in Electronic Equipment
Zhejiang AMA&Hien Technology Co., Ltd.
We are one of the most professional pcb terminals manufacturers in China since 1989, specialized in providing high quality customized products for global clients. We warmly welcome you to buy cheap pcb terminals made in China here from our factory.
Address: Puqi Special Industrial Zone, Yueqing City, Zhejiang Province, China
E-mail: huangyimeng@ama.com.cn
WebSite: https://www.amaelec.com/
