HW-18-12-L-S-575-SM

FAQFrequently Asked Questions

• Can Samtec HW-18-12-L-S-575-SM be used to create a 0.575-inch board-to-board stack, and what mechanical dimensions should I verify? Samtec HW-18-12-L-S-575-SM provides a nominal 0.575-inch (14.605 mm) stack height, with an approximately 0.390-inch (9.906 mm) mating post and 0.965-inch (24.511 mm) overall pin length. Verify the mating connector's engagement depth, PCB thickness, component keep-outs, coplanarity, and enclosure clearance before releasing the board design. The nominal stack height should not be treated as the complete finished board-to-board spacing because PCB thickness, solder joint geometry, connector tolerances, and mating travel also affect the assembly.
• What mating connector should I select for Samtec HW-18-12-L-S-575-SM in a single-row 2.54 mm board-to-board design? Samtec HW-18-12-L-S-575-SM is an 18-position, single-row header with 2.54 mm pitch, so the mating connector must match the position count, pitch, row arrangement, contact geometry, and required stack height. Select a compatible Samtec Flex Stack or HW-series receptacle based on the required mating direction and board spacing, then confirm the manufacturer's mating recommendations and engagement range. A connector with the same pitch but a different contact length or stack-height code may produce insufficient contact overlap or excessive mechanical loading.
• Can Samtec HW-18-12-L-S-575-SM be assembled with standard SMT reflow processing? Samtec HW-18-12-L-S-575-SM uses surface-mount solder termination, making it suitable for an SMT assembly flow when the PCB land pattern, stencil aperture, placement accuracy, and reflow profile are compatible with the manufacturer's recommendations. The available data identifies the part as MSL 1, but the assembler should still follow the supplier's current packaging and reflow guidance. Check solder-joint inspection results after the first build because the connector's pin length and body geometry can affect paste transfer, alignment, and reflow shadowing.
• How should I design the PCB footprint for Samtec HW-18-12-L-S-575-SM? Create the footprint for 18 surface-mount contacts on a single 2.54 mm pitch row and use the exact Samtec recommended land pattern rather than scaling a generic header footprint. Samtec HW-18-12-L-S-575-SM has no second-row spacing, so the footprint should preserve the specified single-row geometry and include mechanical courtyard clearance around the black insulator and mating posts. Validate pad dimensions, solder-mask openings, paste coverage, courtyard limits, and connector orientation against the latest supplier drawing before fabrication.
• Is Samtec HW-18-12-L-S-575-SM suitable for high-current power distribution? Samtec HW-18-12-L-S-575-SM should not be assigned a high-current rating solely from its 18 contacts or 2.54 mm pitch because the supplied product data does not state a contact-current specification. For power distribution, evaluate the allowable current per contact, temperature rise, PCB copper geometry, parallel-contact sharing, voltage drop, mating-cycle requirements, and derating conditions using the manufacturer's electrical specifications. A dedicated power connector or a connector family with a published current rating may be a better fit when continuous current or fault current is substantial.
• Can I use Samtec HW-18-12-L-S-575-SM for high-speed differential signals or controlled-impedance interfaces? Samtec HW-18-12-L-S-575-SM may be usable for low- to moderate-speed interconnects, but the supplied description does not define impedance, insertion loss, crosstalk, or high-speed signal-integrity performance. For USB, LVDS, SERDES, Ethernet, or other controlled-impedance interfaces, model the connector and launch geometry, keep differential pairs symmetric, minimize stubs, and obtain verified high-frequency data from Samtec. The single-row 2.54 mm format can require more routing space and may have higher parasitic effects than a dedicated high-speed connector.
• What should I consider when replacing Samtec HW-18-12-L-S-575-SM with another Samtec header? When replacing Samtec HW-18-12-L-S-575-SM with another Samtec HW or Flex Stack part, compare the full ordering code rather than only the HW-18-12 base number. Confirm position count, 2.54 mm pitch, single-row layout, surface-mount termination, mating-post length, stack-height code, contact finish, mounting orientation, and mechanical body dimensions. A part with the same number of positions but a different stack-height suffix can change board spacing, while a through-hole or different termination variant can require a new PCB footprint and assembly process.
• Can Samtec HW-18-12-L-S-575-SM replace a standard 18-position 2.54 mm pin header? Samtec HW-18-12-L-S-575-SM is not automatically a drop-in replacement for a conventional 18-position 2.54 mm pin header. Its surface-mount termination, 0.575-inch stack height, approximately 0.390-inch mating post, contact geometry, and specified Flex Stack construction must be compared with the existing connector. Replacing a through-hole header may require a new PCB land pattern, different solder-process controls, revised mechanical support, and confirmation that the mating receptacle can engage the available post length.
• How does the gold mating finish on Samtec HW-18-12-L-S-575-SM affect connector selection for long-term use? Samtec HW-18-12-L-S-575-SM uses a 10.0 microinch (0.25 micrometre) gold finish on the mating posts. For industrial or frequently mated equipment, review the complete contact system, including the mating connector's finish, contact normal force, rated mating cycles, environmental limits, and fretting or corrosion performance. Gold plating on one connector does not establish the durability of the complete interface when the mating part uses a different finish or has incompatible contact geometry.
• Is Samtec HW-18-12-L-S-575-SM appropriate for vibration-prone industrial equipment? Samtec HW-18-12-L-S-575-SM can be evaluated for industrial assemblies, but suitability in vibration-prone equipment depends on the complete mechanical design and the connector's published vibration, shock, retention, and mating-cycle ratings. Provide PCB support near the connector, control board flex during insertion, maintain the specified mating alignment, and prevent cable or board loads from being transferred into the solder joints. Qualification should use the intended board stack, enclosure, mating connector, temperature range, and vibration profile rather than the connector alone.
• What operating-temperature and environmental checks are needed before using Samtec HW-18-12-L-S-575-SM outdoors or in harsh environments? Before using Samtec HW-18-12-L-S-575-SM outdoors or in a harsh industrial environment, obtain the current operating-temperature, humidity, corrosion, contamination, and environmental ratings for the complete connector system. The provided product data confirms the gold mating finish and RoHS3 status but does not define sealing or ingress protection. Use enclosure protection, conformal coating rules, contamination controls, and suitable mating hardware when moisture, dust, salt spray, or chemical exposure is present.
• Does the MSL 1 classification change how Samtec HW-18-12-L-S-575-SM should be stored and assembled? Samtec HW-18-12-L-S-575-SM is listed as Moisture Sensitivity Level 1, which supports normal moisture handling within the supplier's stated conditions, but the assembly site should still follow the package label, shelf-life information, and applicable JEDEC procedures. Keep components in their original packaging until production, inspect for package damage or oxidation, and document any extended exposure or unusual storage condition. MSL 1 does not replace process controls for solder paste, board cleanliness, placement, or reflow verification.