2.54mm Pin Header Double Plastic SMT – SMT Male Header for PCB Interconnection

The 2.54mm SMT pin header is a surface-mount male connector widely used for board-to-board and wire-to-board interconnections. This 2.54mm pin header double plastic SMT features a double plastic housing that provides additional insulation between rows and improves mechanical stability during SMT reflow soldering. The standard 2.54mm pitch ensures compatibility with a vast ecosystem of mating connectors, including female headers, IDC sockets, and PCB receptacles.

Designed for automated assembly, this double plastic pin header is supplied in tape-and-reel packaging, compatible with high-speed pick-and-place machines. The high-temperature LCP or PA6T insulator withstands 260°C reflow profiles without deformation, while the precision-stamped brass or phosphor bronze contacts ensure low contact resistance (≤20 mΩ) and high durability. Whether you’re designing industrial control panels, consumer gadgets, or automotive electronics, this connector offers the performance and reliability you need.

Recommended Land Pattern

• Pad Size: 1.2 mm × 1.6 mm (recommended)
• Pad Pitch: 2.54 mm (0.100″)
• Stencil Aperture: 1.0 mm × 1.4 mm (for optimal solder paste volume)
• Solder Mask: NSMD (Non-Solder Mask Defined) recommended for better reliability

Mechanical Dimensions

• Insulator Height: 2.5 mm (standard)
• Contact Length (above PCB): 4.0 mm (standard)
• Coplanarity: ≤ 0.1 mm (ensures reliable SMT soldering)
• Overall Tolerance: ±0.2 mm

For complete mechanical drawings, 2D dimensions, and 3D STEP models, refer to the manufacturer’s datasheet or contact Vistar Electronics for design files. Proper PCB footprint design is critical for achieving optimal solder joint quality and mechanical stability.

What Is a 2.54mm Pin Header Double Plastic SMT?

A 2.54mm pin header double plastic SMT is a surface-mount male connector with a standard 2.54mm pitch and a reinforced double‑plastic housing that provides enhanced insulation, mechanical stability, and protection against solder joint stress. This connector type is widely used in modern PCB assemblies where high-density interconnections and automated SMT assembly are required. The double‑plastic design not only improves dielectric strength (≥1,000 MΩ) but also helps maintain coplanarity during reflow soldering, reducing the risk of open circuits or shorts.

The PH-2.54-DP-SMT model features precision-stamped brass or phosphor bronze contacts with optional gold or tin plating, ensuring low and stable contact resistance (≤20 mΩ). The insulator is made from high-temperature LCP or PA6T, rated UL94V-0, capable of withstanding 260°C peak reflow temperatures without deformation. This makes the connector suitable for lead-free soldering processes and compliant with RoHS 3 and REACH directives.

Key Advantages of Double Plastic Housing

The double plastic pin header construction offers several distinct advantages over single‑plastic designs. First, the additional plastic material increases the creepage and clearance distances between adjacent rows, reducing the risk of electrical arcing and improving insulation resistance — critical in high‑voltage or humid environments. Second, the double‑plastic structure provides better mechanical support for the contacts, preventing them from tilting or becoming misaligned during SMT placement and reflow. Third, the extra plastic mass helps dissipate heat more evenly during soldering, reducing thermal stress on the solder joints and improving long‑term reliability.

These benefits make the double‑plastic SMT pin header an excellent choice for industrial control, automotive, and medical applications where reliability and safety are paramount.

SMT Termination — Advantages for High‑Volume Production

The SMT male pin header is specifically designed for automated assembly using surface‑mount technology. Unlike through‑hole headers, SMT headers are placed directly onto PCB pads and soldered via reflow ovens, significantly reducing assembly time and cost. The tape‑and‑reel packaging ensures compatibility with high‑speed pick‑and‑place machines, enabling fast and accurate placement. Additionally, SMT termination eliminates the need for drilling through‑holes, saving PCB space and simplifying the board layout.

For engineers designing high‑volume consumer electronics or industrial products, SMT pin headers offer a clear advantage in terms of manufacturability and cost‑effectiveness, without compromising mechanical strength or electrical performance.

2.54mm Board to Board Header — Application Scenarios

As a 2.54mm board to board header, the PH-2.54-DP-SMT is commonly used to connect two PCBs in a vertical or right‑angle configuration, depending on the header orientation. Typical applications include:

• Stacked PCB assemblies: In compact devices like smartphones, wearables, and portable instruments, where multiple boards are stacked to save space.
• Daughter‑card connections: In industrial controllers and communication equipment, where expansion modules are plugged into a baseboard.
• Cable‑to‑board connections: When paired with IDC or female header sockets, this connector can serve as a reliable interface for external cables and wiring harnesses.

The double‑plastic housing ensures that the connector maintains its position and alignment even under vibration and thermal cycling, making it suitable for automotive and aerospace applications as well.

Material and Plating Selection Guide

Choosing the right contact material and plating is critical for ensuring long‑term reliability. Vistar offers two main plating options for the PH-2.54-DP-SMT:

• Gold plating (flash or thick): Recommended for high‑reliability applications, such as medical devices, automotive sensors, and industrial controls where oxidation and corrosion must be minimized. Gold provides the lowest contact resistance and the highest durability over thousands of mating cycles.
• Tin plating (matte or bright): A cost‑effective solution for general‑purpose applications where environmental conditions are moderate. Tin‑plated contacts are suitable for consumer electronics, communication equipment, and most industrial applications.

The base contact material is typically brass (for general use) or phosphor bronze (for higher mechanical stress). Both options offer excellent electrical conductivity and formability.

PCB Footprint and SMT Assembly Considerations

Proper PCB footprint design is essential for achieving reliable solder joints. For the 2.54mm SMT pin header, the recommended land pattern consists of rectangular pads (1.2mm × 1.6mm) with a 2.54mm pitch between pads. The stencil aperture should be slightly smaller (1.0mm × 1.4mm) to control solder paste volume and prevent bridging. A non‑solder mask defined (NSMD) pad design is preferred, as it provides better solder joint reliability compared to solder‑mask defined pads.

During SMT assembly, it is important to ensure the coplanarity of the contacts is ≤0.1mm to guarantee all pins make consistent contact with the solder paste. The high‑temperature insulator (LCP/PA6T) allows the connector to withstand 260°C peak reflow temperatures, compatible with lead‑free soldering profiles. After soldering, inspection should focus on solder fillet formation, voiding, and the absence of bridging or misalignment.

Why Choose Vistar as Your Pin Header Manufacturer

Vistar Electronics is a trusted pin header manufacturer and SMT pin header supplier with over a decade of experience serving customers in industrial, automotive, consumer, and medical sectors. Our 2.54mm pin header lineup includes single, dual, and triple‑row configurations with through‑hole, SMT, right‑angle, and straight orientations. We offer competitive pricing, flexible MOQs, and responsive customer support to ensure your project stays on track.

With ISO 9001:2015 certification and a commitment to continuous improvement, Vistar is your reliable partner for high‑quality interconnect solutions. Whether you need standard catalog items or custom OEM configurations, our engineering team is ready to assist you from prototype to production.

For more technical resources, including PCB layout guidelines, pin header selection guides, and application notes, visit our technical blog or contact our engineering support team directly.