MTSW-116-24-S-D-268

FAQFrequently Asked Questions

• Can the MTSW-116-24-S-D-268 be used as a direct replacement for legacy0.1-inch pitch connectors in existing board designs without re-layout? The MTSW-116-24-S-D-268 features a standard 0.100" (2.54mm) pitch with2-row, 32-position configuration and through-hole solder termination, making it mechanically and electrically compatible with most legacy0.1-inch pitch designs. However, verify that the original connector footprint accounts for the 0.112" (2.84mm) post length and 0.480" (12.19mm) overall contact length of the MTSW-116-24-S-D-268. If the board was designed for a connector with significantly different post or mating contact length, you may need to adjust via-placement or clearance zones. Additionally, confirm that the original design does not rely on specific shrouding or retention features that the unshrouded MTSW-116-24-S-D-268 does not provide.
• What are the thermal and electrical limitations of the MTSW-116-24-S-D-268 when carrying continuous3A per pin in a compact multi-layer PCB? The MTSW-116-24-S-D-268 is rated for 3A per contact and operates across -55°C to 125°C. In a densely populated board, all32 pins carrying 3A simultaneously would dissipate approximately 288W, which is significant. Thermal management depends on PCB copper area, via density, and ambient cooling. The polyester glass-filled insulation (UL94 V-0) will not degrade within the operating range, but localized heating around the connector body may occur. Distribute high-current traces across multiple pins where possible, use low-impedance ground and power planes, and ensure adequate via-stitching near the connector pads. For sustained maximum current applications, perform thermal simulations or prototype testing to verify that solder joint temperatures remain below 150°C and that insulation material does not approach its glass transition region.
• Is the MTSW-116-24-S-D-268 suitable for quick-disconnect or hot-swap applications where mating cycles are frequent? The MTSW-116-24-S-D-268 uses a push-pull fastening mechanism and is classified as a cuttable, through-hole header connector rather than a high-reliability connector designed for repeated mating cycles. While the contact finish (gold on mating surface, tin on post) and phosphor bronze base material provide reasonable durability, this connector is not optimized for applications requiring hundreds or thousands of hot-plug cycles. If frequent disconnection is required, consider connectors specifically rated for mating cycle endurance (typically rated for 10,000+ cycles) and featuring keying or polarization features to prevent damage during insertion. The MTSW-116-24-S-D-268 can handle occasional maintenance disconnects industrial environments, but repeated quick-disconnect use may accelerate contact wear and increase contact resistance over time.
• How does the 30µin (0.76µm) gold plating thickness on the MTSW-116-24-S-D-268 compare to military or high-reliability standards, and does it provide adequate corosion protection? The MTSW-116-24-S-D-268 provides 30µin (0.76µm) of gold on the mating contact surface. Military specifications such as MIL-DTL-83513 typically require 50µin (1.27µm) or greater for connectors in harsh environments. The thinner 30µin plating on the MTSW-116-24-S-D-268 provides baseline protection against oxidation and minor tarnishing in controlled environments and is suitable for consumer, industrial, and benchtop laboratory use. In corosive environments (salt spray, high humidity, chemical exposure), the reduced plating thickness may offer shorter service life before contact resistance degradation becomes noticeable. For applications requiring maximum corosion resistance or long-term outdoor exposure, verify that the design includes conformal coating, poting, or environmental sealing around the connector body. The tin post finish, while solderable, is more susceptible to oxidation than gold and should not be exposed to repeated environmental cycling.
• Can the MTSW-116-24-S-D-268 be field-repaired or reworked if a solder joint fails or a pin becomes damaged during assembly? The MTSW-116-24-S-D-268 is a through-hole, solder-terminated connector, making individual pin rework difficult but possible under controlled conditions. If a solder joint cracks, it can be reflowed locally with a soldering iron, though access may be limited depending on board layout and component density. If a contact pin is bent or damaged before soldering, the connector cannot be easily disassembled; the entire connector must be desoldered and replaced. Samtec does not provide individual replacement pins for the MTSW-116-24-S-D-268. During initial assembly, use appropriate wave-soldering or hand-soldering techniques with adequate thermal control (typically 260°C peak, 5–10 seconds time-above-liquidus) to minimize stress on the polyester glass-filled insulation. For high-reliability production, implement automated optical inspection (AOI) and in-circuit testing (ICT) to catch solder defects before deployment. Field replacement requires complete connector desoldering, which may damage the underlying PCB if not executed carefully.
• What is the insertion force and extraction force of the MTSW-116-24-S-D-268, and how does this affect user experience in applications with frequent mating? Specific insertion and extraction force data for the MTSW-116-24-S-D-268 is not detailed in the base product specification, but as a 32-position push-pull header with unshrouded pin geometry, insertion force scales with the number of pins being mated simultaneously. Cuttable headers in the Flex Stack series typically exhibit insertion forces ranging from 50–200 grams-force per row, depending on pin contact pressure and insulation geometry. When mating a 2-row, 32-position configuration, cumulative insertion force may exceed 300 grams-force, requiring deliberate, guided insertion. Extraction typically involves releasing the push-pull clips and withdrawing the mated connector with similar or slightly higher force. In applications with restrictive physical access or where users may be wearing gloves, this force level can lead to misalignment, pin damage, or user frustration. Prototype insertion and extraction tests in the target mechanical environment, and consider adding guide features, alignment posts, or mechanical fixtures to assist users if mating frequency is high.
• Does the MTSW-116-24-S-D-268 meet RoHS3 and MSL requirements for lead-free soldering and moisture-sensitive device handling? The MTSW-116-24-S-D-268 is RoHS3 compliant, meaning it contains no lead in the solder or contact finishes and meets the requirement for use with lead-free soldering processes (typically 255–260°C peak reflow temperature). The MSL (Moisture Sensitivity Level) rating of 1 (Unlimited) indicates that the connector has no moisture absorption limitations and does not require dry-pack storage, desiccant bags, or baking before soldering. This simplifies supply chain logistics and reduces handling costs. The polyester glass-filled insulation material is inherently low in moisture absorption, contributing to the MSL-1 classification. For wave-soldering or hand-soldering applications, no special moisture conditioning is needed. Upon arrival, the MTSW-116-24-S-D-268 can be stored at ambient temperature and humidity and soldered immediately without risk of delamination or voids.
• How should the cuttable feature of the MTSW-116-24-S-D-268 be utilized in custom or prototype designs, and what are the mechanical considerations? The MTSW-116-24-S-D-268 is designated as cuttable, meaning the individual connector strips can be mechanically cut or separated at predefined break points between each2-pin block (one row pair). This allows engineers to order a full32-position strip and cut it down to a smaller 2-pin, 4-pin, 6-pin, etc., configuration to match board-specific requirements. Cutting must be performed with appropriate tooling (typically a dull chisel and hammer or precision shears) applied perpendicular to the connector length, ideally before soldering to the board. Avoid cutting the connector after soldering, as mechanical shock may fracture solder joints or damage the PCB. The break points are designed to cleanly separate without damaging the internal contact spring or insulation structure, but residual burs or sharp edges should be smoothed with a file or sandpaper after cutting. Cutting reduces cost for low-volume protypes but introduces variability in the final connector profile; for production volumes, ordering connectors in the desired pre-cut form is recommended.
• What are the design-in considerations for the MTSW-116-24-S-D-268 in applications requiring long-term outdoor or industrial exposure? The MTSW-116-24-S-D-268 operates across -55°C to 125°C and carries UL94 V-0 flammability rating, meeting basic industrial temperature and safety requirements. However, long-term outdoor exposure introduces environmental stressors not explicitly addressed by the datasheet: the30µin gold plating may gradually corrode under salt spray or acidic atmospheres, the tin post finish oxidizes in high-humidity environments, and the polyester glass-filled insulation can undergo photodegradation if exposed to direct UV sunlight. For outdoor applications, implement protective measures such as conformal coating (acrylic or silicone) applied over the entire connector body, potting with moisture-resistant epoxy if moisture ingress is a concern, or housing the connector within an environmentally sealed enclosure with gaskets and drain holes. Additionally, verify that solder joint reliability is maintained across thermal cycling; the mismatch between PCB CTE (typically 16–17 ppm/K) and the connector insulation CTE may produce stress over -55°C to 125°C extremes. Prototype validation with thermal cycling (IPC-9701 or equivalent) is recommended before high-volume outdoor deployment.
• Can the MTSW-116-24-S-D-268 be used in parallel with other connectors on the same board without cross-talk or signal integrity issues? The MTSW-116-24-S-D-268 is a passive, unshrouded header connector with no integrated filtering, buffering, or impedance control. When multiple connectors are placed in close proximity on the same board, signal integrity depends entirely on PCB layout, trace routing, and the characteristics of the signals themselves. For low-speed digital or analog signals (up to a few MHz), cross-talk is typically negligible if ground planes are continuous beneath the connector pads and traces are routed with adequate separation. For high-speed signals (MHz to GHz range), the unshrouded design offers no inherent shielding; adjacent connectors carrying different signal types may exhibit measurable cross-coupling. Mitigation strategies include: placing ground pins or ground vias between signal pins within each connector, routing high-speed traces on inner layers with solid ground planes above and below, using differential pairs with matched length and spacing for high-speed signals, and maintaining 3–5× trace spacing between different signal types. Use a signal integrity simulation tool (e.g., HyperLynx, ADS, or SPICE) to validate that cross-talk and insertion loss remain within system budget for applications carrying frequencies above 10 MHz.
• Is the MTSW-116-24-S-D-268 suitable for use in medical, aerospace, or automotive applications where qualification and traceability are mandatory? The MTSW-116-24-S-D-268 is a commercial-grade connector carrying RoHS3 compliance and UL94 V-0 flammability certification but is not explicitly qualified for medical (IEC 601), aerospace (AS9100), or automotive (AEC-Q200) applications. Medical devices typically require connectors with higher contact reliability ratings, documented biocompatibility testing, and traceability to regulatory-approved material batches. Aerospace applications demand connectors rated to MIL-DTL-83513 or equivalent, with higher plating thickness, mating cycle endurance testing, and detailed failure analysis documentation. Automotive applications require AEC-Q200 qualification, extended temperature cycling validation, and electromagnetic compatibility (EMC) testing. To use the MTSW-116-24-S-D-268 in these regulated markets, consult with the design authority and regulatory body to determine if a commercial-grade connector is acceptable or if a specifically qualified alternative is required. Samtec offers higher-reliability variants of the MTSW series; review the Samtec product selector or contact applications engineering to identify pre-qualified alternatives that meet specific regulatory or market standards.
• What are the voltage and current derating considerations for the MTSW-116-24-S-D-268 when operating near the 125°C upper temperature limit? The MTSW-116-24-S-D-268 is rated for 3A per contact across the full -55°C to 125°C operating range. No explicit voltage rating is provided in the datasheet, but as a standard 0.1-inch pitch header with 0.100" (2.54mm) insulation height and polyester glass-filled insulation, typical isolation voltage is 600V DC or higher between adjacent pins. Current-carrying capacity does not automaticallyderate with temperature in Samtec headers; however, contact resistance increases slightly at temperature extremes due to material resistivity changes. At 125°C, the30µin gold plating becomes more susceptible to interdiffusion with the underlying phosphor bronze, potentially increasing contact resistance by 5–15% over the lifetime. For applications carrying near-rated current (2–3A) at sustained elevated temperatures (>100°C), perform thermal analysis to estimate localized solder joint and insulation temperatures; if the insulation surface approaches125°C, reduce applied current or improve thermal management. Additionally, ensure that any conformal coating or potting material applied to the connector maintains its mechanical properties and electrical insulation above 100°C; organic coatings may soften or outgas at the upper operating range.
• How does the unshrouded design of the MTSW-116-24-S-D-268 affect assembly yield and the risk of solder bridges or accidental shorts? The MTSW-116-24-S-D-268 lacks shrouding around individual pin groups, leaving the pin fields exposed during assembly. This increases the risk of solder bridges between adjacent pins if wave-soldering parameters are not tightly controlled or if solder paste application is excessive. Bridge formation typically occurs when solder wets multiple pins simultaneously due to high temperature or prolonged time-above-liquidus. To minimize bridging with the MTSW-116-24-S-D-268: use appropriately sized solder paste apertures in the stencil (typically 80–90% of pad area), maintain consistent paste height (3–4 mils), limit peak reflow temperature to 260°C with 5–10 second time-above-liquidus, and use solder with flux chemistry optimized for low-residue or no-clean applications. Automated Optical Inspection (AOI) immediately after reflow is critical to detect and repair any bridges before functional testing. In wave-soldering, reduce solder pot temperature to 240–245°C and increase conveyor speed to minimize dwell time. The unshrouded design also exposes the connector to mechanical damage during handling and assembly; implement protective measures (e.g., temporary covers or fixtures) until the board reaches final test.
• What are the compatibility considerations when mating the MTSW-116-24-S-D-268 header with third-party connector receptacles or cables? The MTSW-116-24-S-D-268 is a male pin header with0.100" (2.54mm) pitch, designed to mate with standard 0.1-inch pitch female receptacles from numerous manufacturers (e.g., Molex K, TE Connectivity AMP, Samtec MEC, etc.). Pin count, row configuration, and pitch must match exactly for mechanical and electrical compatibility. Verify that the mating receptacle accommodates the 0.268" (6.80mm) mating contact length of the MTSW-116-24-S-D-268; shorter mating contacts may not achieve full insertion and will result in intermittent connection or damage. Contact force and press-fit pressure specifications of the receptacle must be compatible with the spring force of the MTSW-116-24-S-D-268 pins to ensure reliable electrical contact without excessive wear. If using cables with attached connectors, confirm that cable gauge, length, and connector connector's crepage and clearance ratings meet the application's voltage and current requirements. Perform continuity testing and low-voltage resistance measurements after mating to verify that contact resistance is below10 mΩ per pin; elevated resistance may indicate poor contact, contamination, or connector wear and requires investigation.
• What supply chain or lead-time considerations should be evaluated when designing with the MTSW-116-24-S-D-268? The MTSW-116-24-S-D-268 is a standard commercial connector from Samtec Inc., a well-established electronics distributor with global availability through multiple channels (direct, authorized distributors, and e-commerce platforms). Lead times are typically short (2–4 weeks) for stock quantities, though volume constraints or market disruptions may extend delivery times. The MSL-1 rating and lack of moisture sensitivity eliminate special handling costs and expedite inventory management. However, the cuttable design and specific configuration (MTSW-116-24-S-D-268) may have lower stock levels than generic0.1-inch pitch headers; verify availability for your production volume and timeline during design phase. Consider maintaining a small buffer stock (5–10% of annual consumption) to mitigate supply disruptions. If the MTSW-116-24-S-D-268 becomes unavailable, compatible alternatives exist from other manufacturers (Molex, TE Connectivity, Phoenix Contact, etc.) with similar 0.1-inch pitch, 2-row configuration, but verify that pin assignment, contact length, and fastening mechanism match to avoid re-layout. Perform a supply-chain risk assessment early in design to identify single-source vulnerabilities or obsolescence risks.