HW-26-10-F-S-565-SM

FAQFrequently Asked Questions

• What are the key differences between the HW-26-10-F-S-565-SM and other 26-position 0.1" pitch headers when designing a stackable connector system? The HW-26-10-F-S-565-SM is part of Samtec's Flex Stack series and features a 0.565" stack height with gold-plated mating posts. This specific stack height is optimized for applications requiring multiple connector levels without excessive board-to-board spacing. Unlike fixed-height headers, the modular Flex Stack design allows selective stacking configurations. The 0.200" mating post length provides a standard engagement depth suitable for most PCB-mounted receptacles. When comparing to competitors like TE Connectivity or Molex alternatives, verify the exact stack height tolerance and gold plating thickness (0.076µm on this model) as these affect signal integrity and connector longevity in repeated mate-demate cycles.
• Can the HW-26-10-F-S-565-SM be used as a direct replacement for legacy DIP-26 or DIL-26 connector applications? The HW-26-10-F-S-565-SM uses 0.100" (2.54mm) pitch with surface mount termination, making it suitable for direct footprint replacement only if your existing design already uses SMD-based headers. Legacy DIP-26 through-hole connectors cannot be directly replaced without PCB redesign, as this model lacks through-hole leads. However, if your application previously used other 0.1" pitch SMD headers, the HW-26-10-F-S-565-SM offers drop-in compatibility with equivalent row spacing and contact geometry. Validate that your PCB's pad pattern matches the 26-position single-row configuration before committing to production.
• What design considerations should be addressed when using the HW-26-10-F-S-565-SM in a high-vibration or shock-prone industrial environment? The HW-26-10-F-S-565-SM employs surface mount termination (solder connections) rather than mechanical retention, which can be vulnerable in high-vibration applications. The solder joint reliability depends on PCB material glass transition temperature (Tg), solder alloy composition, and pad design. In industrial settings with continuous vibration or thermal cycling, use underfill or conformal coating on solder joints to improve fatigue resistance. The gold contact finish (3.00µin) on mating posts provides corrosion resistance but does not protect solder connections. Implement strain relief through careful trace routing and consider mechanical retention clips or mounting brackets to reduce flexing at solder joints. Test early prototypes with vibration profiles matching your end application.
• How does the HW-26-10-F-S-565-SM perform in applications requiring repeated mate-demate cycles, and what are the wear characteristics? The gold-plated mating posts (0.076µm thickness per Samtec specification) are designed to withstand multiple engagement cycles. Gold thickness at this level provides approximately 50-100 mate-demate cycles before noticeable wear begins, though actual performance depends on insertion force, contact pressure, and connector housing material. Over extended use, contact resistance may increase as the gold layer wears through to base metal. The HW-26-10-F-S-565-SM is rated for standard commercial duty cycles (typically 25-50 insertions) rather than high-reliability applications requiring 500+ cycles. For applications with frequent reconfiguration or test fixtures, specify higher plating thickness versions or consider spring-contact alternatives that distribute wear more evenly across multiple contact points.
• What PCB design rules and layout considerations are critical when implementing the HW-26-10-F-S-565-SM on a multilayer board? The HW-26-10-F-S-565-SM requires solder pad pattern design following Samtec's guidelines for 0.100" pitch headers, typically 0.046" (1.17mm) square pads with 0.200" spacing center-to-center. Ensure sufficient via clearance and trace routing underneath the connector footprint; most designs reserve a keepout zone of 0.050-0.100" around the perimeter. For reliable solder joint formation during reflow, confirm your board thickness (typically 0.062" for standard PCBs) allows the mating posts to protrude adequately without interference. In multilayer designs, use ground planes or layers beneath the connector to minimize crosstalk on adjacent signal traces. The 0.565" stack height may affect layer stackup if the connector mounts on internal features; verify clearance to any overlying components or enclosure.
• Is the HW-26-10-F-S-565-SM suitable for high-speed digital signal transmission, and what impedance or signal integrity considerations apply? The HW-26-10-F-S-565-SM is a passive connector with no active circuitry; signal integrity depends on the printed circuit board trace routing and the mating receptacle design. For high-speed applications (above 100 MHz), the single-row configuration may introduce significant impedance discontinuities at the connector interface. Trace impedance matching to the connector pad geometry becomes critical; typical 50-ohm systems require careful via placement and ground return paths. The 0.100" pitch spacing limits high-speed performance compared to fine-pitch alternatives (e.g., 0.050" pitch). Cross-talk between adjacent pins increases with signal frequency; isolation layers or ground planes adjacent to signal traces help mitigate this. For applications above 1 GHz or involving differential signaling, evaluate dedicated high-speed connector families designed with controlled impedance rather than generic headers.
• What moisture and humidity precautions are necessary when storing and handling the HW-26-10-F-S-565-SM, given its MSL-1 rating? The HW-26-10-F-S-565-SM carries an MSL (Moisture Sensitivity Level) rating of 1, indicating unlimited floor life—the component can be exposed to factory ambient conditions indefinitely without degradation. This simplifies supply chain logistics compared to MSL-2 or higher components requiring dry-pack storage. However, the Samtec base material (likely LCP plastic) is hygroscopic; prolonged exposure to high humidity (>85% RH) may cause slight dimensional changes affecting insertion force or contact resistance. Store components in standard ESD bags without desiccant packs. After unpacking, allow components to acclimate to your assembly environment for 1-2 hours before reflow soldering. The MSL-1 rating means post-reflow moisture ingress risk is negligible, eliminating the need for bake-out procedures prior to assembly.
• How does the HW-26-10-F-S-565-SM compare to alternative Samtec HW series variants, and when should a different stack height or configuration be selected? The HW-26-10-F-S-565-SM is part of Samtec's modular Flex Stack platform; the suffix '-565-SM' indicates 0.565" stack height (14.351mm), which accommodates one or two typical PCB thicknesses when used in stacked configurations. Alternative stack heights include 0.315" (single-level shallow stacking) and 1.000" (dual-level aggressive stacking). Choose stack height based on your mechanical clearance budget: if mating receptacles stack tightly, a shallower variant reduces vertical footprint. Conversely, applications requiring multiple expansion cards or multi-level interconnects benefit from taller stack heights. The HW-26-10 base part number indicates 26 positions and 0.100" pitch; variations exist in row count (1-row vs. 2-row), contact finish, and mating post length. Verify Samtec's published compatibility matrix before substituting variants, as solder joint design and receptacle alignment may differ.
• What is the thermal operating range for the HW-26-10-F-S-565-SM, and are there derating considerations for solder joint reliability at temperature extremes? The HW-26-10-F-S-565-SM's base plastic material (LCP) typically supports operating temperatures from -40°C to +105°C in standard commercial applications. The solder joints are the limiting factor at temperature extremes; lead-free solder (SAC305) exhibits creep above 85°C with exposure duration. In thermal cycling environments (e.g., -40°C to +85°C, 500 cycles), solder joint fatigue becomes a reliability risk, particularly for surface-mount headers. The gold contact finish remains stable across this temperature range. For applications requiring extended operation above 85°C (industrial, automotive, military), use thermal analysis to confirm solder joint strain remains within acceptable limits, or specify higher-Tg board materials and enhanced solder joint design (thicker traces, thermal vias). If operating below -40°C, verify that the connector housing remains brittle-resistant; LCP materials can become fragile at extreme cold.
• Can the HW-26-10-F-S-565-SM be soldered using wave soldering, or must it be exclusively reflow-soldered? The HW-26-10-F-S-565-SM is designed for reflow soldering (SMD process); wave soldering is not recommended. Wave soldering exposes the plastic housing to high temperatures (250-260°C) for extended duration, risking deformation or material degradation of the LCP connector body. Additionally, the solder pot's mechanical action may displace the connector or create solder bridges across adjacent pins in the high-density 26-position configuration. If your production environment uses only wave soldering processes, consult Samtec's application notes or request alternative connector geometries compatible with your assembly method. For hybrid designs mixing through-hole and SMD components, use selective soldering or hand-soldering techniques for headers like the HW-26-10-F-S-565-SM rather than exposing them to full wave-solder conditions.
• What certifications and compliance standards does the HW-26-10-F-S-565-SM meet for aerospace, automotive, or medical device applications? The HW-26-10-F-S-565-SM carries RoHS3 compliance and is listed as ECCN EAR99 (general commercial electronics). However, it does not inherently meet aerospace (AS9100), automotive (AEC-Q), or medical (IEC 60601) qualifications without additional component-level testing and documentation from Samtec. Aerospace applications require traceability, counterfeit controls, and batch-level testing; contact Samtec's aerospace division for HW-26-10-F-S-565-SM variants with approved documentation. Automotive applications under AEC-Q200 may require higher-temperature rated versions and extended thermal cycling validation; verify if Samtec offers AEC-qualified HW series derivatives. Medical device applications require biocompatibility assessment and sterilization compatibility confirmation. If your end application demands these certifications, budget additional engineering effort and lead time; do not assume the commercial HW-26-10-F-S-565-SM is suitable without formal qualification.
• How should the HW-26-10-F-S-565-SM be handled to prevent electrostatic discharge (ESD) damage, and are there specific ESD precautions beyond standard practice? The HW-26-10-F-S-565-SM itself is a passive connector with no semiconductor components; ESD risk is primarily to the mating receptacle or PCB-mounted circuitry connected downstream. Standard ESD handling precautions (wrist straps, conductive workstations, ESD bags) are sufficient for the HW-26-10-F-S-565-SM. The gold-plated mating posts are conductive and do not accumulate charge; the LCP plastic housing is non-conductive but does not require special grounding. Treat ESD protection as a system-level concern: ensure receptacles mated to the HW-26-10-F-S-565-SM do not introduce ESD vulnerability through unshielded trace runs or high-impedance signal paths. If the connector carries high-speed digital or analog signals, implement proper trace shielding and ground return paths rather than relying on the connector geometry alone to prevent ESD coupling.
• What is the insertion force specification for the HW-26-10-F-S-565-SM, and how does it affect user experience and mechanical design? Samtec does not publish a specific insertion force value for the HW-26-10-F-S-565-SM in standard datasheets; force depends on the mating receptacle design and contact pressure. Typical 0.100" pitch header receptacles require 2-5 pounds total insertion force for 26 positions, distributed across all contacts. High insertion force can cause mechanical stress on the solder joints during mate-demate cycles or field installation, particularly if technicians apply uneven pressure. Design mechanical guides or keying features to ensure alignment and reduce required force. If your application requires frequent user engagement (e.g., daughterboard installation in field service), test the HW-26-10-F-S-565-SM with your specific receptacle and apply force measurement tools to verify the interface is ergonomic and repeatable. Receptacles with spring-loaded or low-profile contacts may reduce insertion force compared to standard designs.
• Does the HW-26-10-F-S-565-SM require any special handling or pad preparation before PCB assembly, and are there recommended footprint tolerances? The HW-26-10-F-S-565-SM requires standard SMD solder pad design with typical tolerances of ±0.005" (±0.127mm) for pad position. Samtec publishes detailed footprint guidelines on their website; use their CAD libraries to ensure pad geometry, spacing, and solder mask openings match specifications. No special pre-assembly treatment is required; standard flux application during reflow is sufficient. Ensure solder mask clearance around pads (typically 0.008-0.010" beyond pad perimeter) to prevent bridging. For automated assembly, verify your pick-and-place machine can handle the connector's height (0.765" overall pin length) and profile without collisions on neighboring components. If the HW-26-10-F-S-565-SM is mounted on the same side as tall components, adjust placement sequencing or use lower-profile neighboring parts to avoid nozzle interference during pick-and-place operations.
• In a replacement or end-of-life scenario, what alternative connectors from other manufacturers (TE Connectivity, Molex, JAE, etc.) offer equivalent or superior functionality to the HW-26-10-F-S-565-SM? Direct mechanical and electrical equivalents to the HW-26-10-F-S-565-SM include TE Connectivity's standard 2.54mm pitch headers (part numbers in the 5-87622 series), Molex's generic 0.100" SMD headers, and JAE's comparable stacking connectors. TE's 5-87622 series offers similar 26-position single-row configurations with comparable gold plating and stack heights, though gold thickness (typically 0.1-0.2µm) may differ. Molex alternatives often feature lower insertion force and slightly different contact geometry, which may require receptacle compatibility verification. For cost-sensitive applications, generic unbranded 0.100" pitch headers from Asian suppliers (via distributors) are mechanically compatible but lack Samtec's manufacturing documentation and traceability. Trade-offs include shorter contact life expectancy, higher corrosion risk, and inconsistent solder joint reliability in these alternatives. When replacing the HW-26-10-F-S-565-SM, verify the new connector's solder pad footprint against your existing PCB design, as subtle pitch or corner radius differences can cause assembly misfeeds or solder defects. Request compatibility documentation from the alternative supplier before committing to large production volumes.