HTSW-110-17-F-D

FAQFrequently Asked Questions

• What are the key differences between the HTSW-110-17-F-D and other 20-position 2.54mm headers when designing a board-to-board connection? The HTSW-110-17-F-D features a 2-row, 10-position-per-row configuration with 0.100" (2.54mm) pitch in both mating and row spacing, making it suitable for compact PCB layouts. The gold-plated mating contacts (3.00µin thickness) provide reliable signal integrity over manyating cycles, while the tin-plated solder posts ensure good solderability. The 0.620" mating contact length and push-pull fastening mechanism distinguish it from friction-fit alternatives, offering positive engagement for applications requiring repeated connect-disconnect cycles. The LCP insulation rated UL94 V-0 and operating range of -55°C to 125°C make it suitable for industrial environments where thermal cycling and flame rating compliance are design constraints.
• Can the HTSW-110-17-F-D be used as a replacement for legacy DIP header connectors in retrofit or legacy system upgrades? The HTSW-110-17-F-D can replace legacy DIP headers if the original design used 0.100" pitch and 2-row configuration. However, several design implications warrant verification: the 0.110" (2.79mm) post length requires PCB-via hole placement to accommodate solder filets, the push-pull fastening mechanism may not be present in older designs lacking corresponding mating socket features, and the gold-mating/tin-post finish combination differs from legacy tin-over-nickel plating, which may affect long-term reliability in high-vibration environments. If the legacy system used 0.050" or other non-standard pitches, direct substitution is not possible without redesigning the PCB footprint and mating connector.
• What current-carrying capacity should be assumed for the HTSW-110-17-F-D in high-power applications, and how does contact cross-section affect thermal design? The HTSW-110-17-F-D datasheet specifies current rating as 'Varies by Wire Gauge,' meaning the connector itself does not limit current—the wire or PCB trace used for interconnection becomes the limiting factor. For through-hole solder joints, typical copper traces (1 oz/ft² thickness) with 10-mil width can safely handle 0.5–1.5 A before reaching 10°C rise. The phosphor bronze contacts with gold plating (3.00µin) minimize contact resistance, typically 5–15 miliohms per contact pair when mated. In designs carrying >5 A per signal line, use multiple contacts in parallel, verify PCB trace impedance budgets, and account for I²R heating in the solder joint and trace. The -55°C to 125°C operating range means thermal design must factor ambient temperature; a connector dissipating 100 mW at 25°C ambient will dissipate proportionally more in125°C environments.
• How does the HTSW-110-17-F-D perform in applications requiring high-frequency signal transmission, and what impedance considerations apply? The HTSW-110-17-F-D is a general-purpose through-hole header with no defined characteristic impedance control, making it unsuitable for matched-impedance applications exceding approximately 100 MHz. The two-row, 0.100" pitch geometry, combined with solder-joint inductance and uncontrolled trace routing, introduces transmission-line discontinuities that cause signal reflections and crosstalk. For digital signals below 50 MHz, the connector performs adequately with standard design practices (short traces, ground vias). For applications requiring controlled impedance—such as CAN, RS-485, USB, or RF circuits—alternative connectors with defined impedance (typically 50Ω or 75Ω) and differential pair spacing should be evaluated. If the HTSW-110-17-F-D must be used for moderate-speed differential signals, maintain consistent trace widths, place ground return vias near signal transitions, and limit trace lengths to <3 inches to minimize reflections.
• What are the practical constraints when hand-soldering HTSW-110-17-F-D headers versus using automated assembly, and how does the post length affect rework? The HTSW-110-17-F-D's 0.110" (2.79mm) post length is designed for PCB through-holes with standard 0.040" diameter, leaving approximately 0.070" of post exposed above the PCB surface for solder fillet formation. Hand soldering is straightforward using standard irons (25–40 W) with lead-free solder (SAC305), typically requiring 3–5 seconds per joint at 250–260°C tip temperature. Automated assembly (wave or reflow) performs well, though wave-soldering requires proper conveyor speed adjustment to ensure complete solder bridge formation between top and bottom rows. Rework is challenging because the 20-position header requires desoldering all joints simultaneously; a rework station with a 20-pad heated block or careful hand-iron rework of each post is necessary. The LCP insulation material (UL94 V-0) withstands repeated heating to 250°C, but excessive rework cycles (>3 per joint) risk plastic crep around the solder joint, potentially loosening the contact.
• Is the HTSW-110-17-F-D suitable for outdoor or high-humidity industrial applications, and what corosion considerations apply to the gold and tin finishes? The HTSW-110-17-F-D is classified as Not Applicable for Moisture Sensitivity Level (MSL), indicating the plastic enclosure itself does not absorb moisture. However, the gold-plated mating contacts (3.00µin thickness over phosphor bronze base) and tin-plated solder posts present different corrosion profiles. Gold plating provides excellent corosion resistance in humid environments, protecting the underlying base metal for decades. The tin-plated posts are susceptible to white corosion (tin oxide formation) in environments with high humidity and salt spray (marine, coastal), typically within 6–12 months of exposure without protective coating. For outdoor applications, consider conformal coating (acrylic or polyurethane) over the solder joints, or specify a connector variant with nickel-plated posts if available. The -55°C to 125°C operating range does not account for thermal cycling in outdoor humidity, which accelerates corrosion; designs should include condensation management (desiccant, heating, or moisture barriers) or specify higher-grade finishes.
• How does the HTSW-110-17-F-D perform in vibration-prone environments, and what mechanical stress factors should be considered for solder joint reliability? The HTSW-110-17-F-D uses push-pull fastening, which locks the mating connector and reduces mechanical stress on solder joints compared to friction-fit headers. However, vibration testing per IEC 6068-2-6 (Category 4, 10–500 Hz sweep, 2g amplitude) shows that through-hole solder joints are susceptible to fatigue cracking at frequencies near PCB resonance (typically 150–300 Hz for small boards). The 0.110" post length, combined with the 0.100" insulation height, creates a compliant structure that can flex under vibration, inducing cyclic stress in the solder fillet. Designs in high-vibration environments (automotive, industrial machinery, aerospace) should implement: (1) mechanical strain relief clamps on the mating cable or connector, (2) shorter traces to reduce PCB flex, (3) solder joint inspection after thermal cycling and vibration testing, and (4) consideration of a lower-profile alternative connector if space allows. The tin-plated posts are more prone to microcracking in cold-solder conditions; inspection with X-ray or acoustic microscopy after vibration qualification is recommended.
• Can the HTSW-110-17-F-D be intermixed with other connector pitches or row spacings on the same board, and what design rules apply when mixing connector types? The HTSW-110-17-F-D's fixed 0.100" pitch in both mating and row spacing means it is fundamentally incompatible with 0.050", 0.125", or other pitch standards without custom PCB routing and mechanical fixtures. If a design requires multiple connector types on the same board, each connector must occupy its own footprint area; attempting to stack or nest dissimilar pitches will result in mechanical interference or electrical shorts. The push-pull fastening on the HTSW-110-17-F-D is specific to this connector series; mixing with friction-fit headers or right-angle variants requires custom mechanical hardware or custom molded interface plates, adding cost and assembly complexity. Best practice is to standardize on a single connector family (such as HTSW series across all form factors) to simplify procurement, assembly, and field replacement. If multi-pitch designs are unavoidable, document the connector positions clearly in assembly drawings, use color-coded cable harnesses, and implement mechanical keying or polarization to prevent misconnection.
• What is the shelf life of the HTSW-110-17-F-D when stored in bulk, and are there any precautions needed for long-term warehousing before assembly? The HTSW-110-17-F-D is supplied in Bulk packaging (unwrapped or in trays) and is RoHS3 Compliant with no Moisture Sensitivity Level assigned, indicating the connector does not degrade from humidity during storage. Storage life is typically 2–5 years under standard conditions (15–25°C, <60% RH), limited primarily by corosion of the tin-plated solder posts rather than the plastic or gold contacts. When stored in high-humidity or salt-fog environments (coastal, chemical plants), white corrosion can form on the tin posts within6–12 months, which appears as white powder but typically dissolves during soldering without affecting electrical performance. For extended storage (>2 years) or harsh environments, store connectors in moisture-sealed bags with desiccant packs, and verify post appearance before assembly. Unwrapped bulk storage in open air is not recommended beyond 6 months; re-packaging into sealed bags every 6 months extends usable shelf life. The LCP insulation material is stable across the entire storage period and does not require special handling.
• How should the HTSW-110-17-F-D be tested during incoming inspection or qualification, and what failure modes are most common in field deployments? Incoming inspection for the HTSW-110-17-F-D should verify: (1) visual conformance—no bent pins, cracked insulation, or discolored solder posts, (2) contact resistance—<50 miliohms per contact using a micro-ohm meter with 100mA test current, (3) mating force—measured with a force gauge, typically 20–50 grams-force per contact (total 400–1000 grams for a 20-position header), and (4) insertion/withdrawal cycles—at least 5mate-demate cycles to verify fastening mechanism operation. Field failures typically fall into three categories: (1) cold solder joints around the post perimeter, identifiable by visual inspection or X-ray, resulting from inadequate reflow temperature or rework; (2) contact corosion on tin posts in high-humidity environments, manifesting as intermittent signal loss or elevated contact resistance; and (3) mechanical loosening of contacts due to vibration-induced solder fatigue, occurring over6–24 months in vibration-prone applications. Qualification testing per IEC 60512-93 (temperature cycling, humidity, vibration, and thermal shock) is recommended for critical applications before production release. Post-assembly testing should include continuity verification (ohm meter or bed-of-nails probe) and visual inspection of solder filets under magnification (10–20x).