Guide to Selecting JST XH Connectors for Electronics

JST XH Connectors: An In-depth Analysis for Electronic Engineers

In the field of electronic engineering, the selection of connectors is critical as it directly impacts circuit stability and reliability. The JST XH series connectors, as a common wire-to-board solution, are widely used in various electronic devices. However, engineers often face confusion when distinguishing between similar models like JST XH and JST PH, as well as terms like XHP and XHR. This article provides an in-depth analysis of JST XH connectors from a data analyst's perspective, covering key specifications, model differences, common questions, and practical removal techniques to aid in informed decision-making.

JST XH Connectors: Core Specifications and Features

The JST XH connector is a single-row, 2.50mm pitch crimp-style wire-to-board connector system. Its primary characteristics include:

• Pitch: 2.50mm, suitable for space-constrained applications.
• Circuit Size: Available in 1 to 20 circuits to accommodate diverse connection needs.
• Terminal Type: Crimp-style, ensuring reliable electrical connections.
• PCB Mounting Options: Offers four types: through-hole, right-angle through-hole, surface-mount (SMT), and right-angle SMT, providing flexibility for various PCB designs.
• Compatible Wire Gauge: Supports AWG30 to AWG22, covering common wire sizes.
• Rated Current: 3A, sufficient for most low-power applications.
• Rated Voltage: 250V, offering an adequate safety margin.

JST XH vs. JST PH: Key Differences

Both JST XH and JST PH are popular wire-to-board connectors, but they differ in pitch and current ratings. The table below provides a detailed comparison:

As shown, the JST XH has a larger pitch and higher current rating, making it better suited for applications requiring higher current capacity. The JST PH, with its smaller pitch, is ideal for space-limited designs.

Clarifying Terminology: XH, XHP, and XHR

A common question is: "What is the difference between JST XH and JST XHP?" This phrasing is technically inaccurate. JST XH refers to the connector series, while JST XHP specifically denotes the plug housing (wire connector) within the XH series. Therefore, XHP is a subset of XH.

Regarding "XHR," JST's official documentation does not list this as a valid model. The "P" in "XHP" stands for "Plug," while "R" typically signifies "Receptacle" (e.g., in other series like SMR or SMP). If XHR appears in documentation, it may be an outdated term or mislabeling.

JST PH vs. PHR: Addressing Confusion

Similarly, JST PH and PHR connectors are frequently conflated. In reality, "PH" is the official series name for 2.0mm pitch, wire-to-board crimp connectors supporting AWG #30 to #24 wires and 2A current, often used in compact applications like battery packs. "PHR" typically refers to specific receptacle housings within the PH series (e.g., PHR-2, PHR-3) rather than representing a distinct connector type.

Removing JST XH Connectors: Practical Techniques

To safely disassemble JST XH connectors, follow these steps:

1. Tools Needed: A fine-point tool like a ballpoint pen tip or dedicated extraction tool.
2. Locate the Locking Tab: Identify the tab on the terminal, usually positioned at the top or side.
3. Release the Tab: Gently press the locking tab to disengage it from the housing.
4. Extract the Terminal: While holding the tab, carefully pull the wire to remove the terminal.

Note: Reusing crimped terminals is not recommended, as the locking mechanism may be damaged during removal, compromising reliability. Always use new terminals for reassembly.

Conclusion

The JST XH connector series offers a reliable wire-to-board solution for diverse electronic applications. By understanding its specifications, distinguishing it from similar models like JST PH, and applying proper removal techniques, engineers can ensure optimal performance and longevity in their designs.