MTSW-132-13-L-D-990

FAQFrequently Asked Questions

• Can the MTSW-132-13-L-D-990 header be used in applications requiring board-to-board stacking with minimal clearance? The MTSW-132-13-L-D-990 is rated for board-to-board or cable applications with a contact length of 0.990" (25.15mm) and an overall contact length of 1.230" (31.24mm). When stacked, the mated stacking height specification should be verified against your PCB spacing constraints. The through-hole mounting design allows for controlled stack heights, but you must account for the solder joint depth and insulation height of 0.100" (2.54mm) when calculating clearances for adjacent components or thermal management solutions.
• What are the thermal design considerations when using the MTSW-132-13-L-D-990 industrial environments near its maximum operating temperature? The MTSW-132-13-L-D-990 operates from -55°C to 125°C with a current rating of 3A per pin. At the upper temperature extreme, resistive heating from current flow through the phosphor bronze contacts and gold-plated mating surfaces must be modeled. With 64 positions in a 2-row configuration and maximum continuous current on all pins (theoretical 192A total), thermal dissipation becomes critical. The polyester glass-filled insulation (UL94 V-0 rated) maintains structural integrity but has limited thermal conductivity. For designs operating near 125°C, verify that solder joint reliability is maintained and consider thermal cycling stress on the through-hole terminations.
• Is the MTSW-132-13-L-D-990 suitable as a direct replacement for legacy0.100" pitch connectors in 40+ year old equipment? The MTSW-132-13-L-D-990 matches the 0.100" (2.54mm) pitch standard and can be mechanically compatible with legacy equipment, but design considerations apply. The contact length specifications (0.990" mating, 0.140" post) must align with the original connector's depth and mating force characteristics. Modern gold plating thickness of 10.0µin (0.25µm) on mating surfaces may differ from original specifications, affecting contact resistance and wear patterns. The phosphor bronze base material and UL94 V-0 flame rating represent current manufacturing standards rather than original specifications. For critical replacements, verify mechanical envelope, electrical performance under operating current, and any changes to insertion force before full deployment.
• What moisture and solderability concerns apply to the MTSW-132-13-L-D-990 in high-humidity or coastal environments? The MTSW-132-13-L-D-990 carries MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitation during storage and handling. The polyester glass-filled insulation resists moisture ingress. However, the unshrouded design exposes the 64 pin positions and mating surfaces to direct environmental contact. In coastal or high-humidity environments, the10.0µm gold plating on mating surfaces provides corosion resistance, but the tin-plated solder posts are susceptible to tin whisker growth or oxidation over extended periods. PCB layout should include conformal coating or selective poting around the connector footprint if moisture exposure is continuous. Contact resistance may increase over time due to surface oxidation on the tin posts.
• How does the MTSW-132-13-L-D-990 perform when subjected to repeated insertion and withdrawal cycles in a design-in or test environment? The MTSW-132-13-L-D-990 features a push-pull fastening mechanism and gold-plated mating contacts rated for repeated mating cycles. The contact length of 0.990" (25.15mm) and square contact shape are designed for consistent contact pressure across cycles. However, each mating cycle introduces mechanical stress on the through-hole solder joints and potential flexing of the PCB. The phosphor bronze contact material exhibits fatigue over high cycle counts. For test benches or development environments requiring1000+ insertion cycles, verify that the PCB pad design incorporates stress relief (teardrops or chamfered corners) and consider the cumulative wear on the gold plating thickness. After sustained cycling, re-measure insertion force and contact resistance to detect degradation.
• Can the MTSW-132-13-L-D-990 be partially populated, and what electrical isolation exists between loaded and unloaded positions? The MTSW-132-13-L-D-990 is specified with 'All' positions loaded, meaning all 64 pin positions are populated and soldered. However, the cuttable design allows mechanical separation of specific positions if required. Each pin position is electrically isolated within the connector itself, as the phosphor bronze contacts and polyester glass-filled insulation provide no cross-talk paths between adjacent pins. If selective loading is required for your application, verify mechanical stability after cutting; the header can become fragile at the cut interface. From an electrical perspective, unloaded positions remain open-circuit but present minor parasitic capacitance to adjacent loaded traces. For high-frequency or noise-sensitive applications, unloaded positions should be routed to ground or left floating with care to avoid coupled noise.
• What are the design-in considerations for the MTSW-132-13-L-D-990 in mixed-signal systems with both analog and digital signals? The MTSW-132-13-L-D-990 does not specify differential pair characteristics, impedance control, or return path management. Each pin position carries independent signal paths with no integrated ground return. In mixed-signal designs, ground pins must be strategically assigned to establish return paths for analog and digital sections. The 2-row configuration with 0.100" (2.54mm) pitch allows minimal pin spacing, risking crosstalk between adjacent signal pins if analogd digital signals share rows. Signal integrity analysis is necessary to determine acceptable clock frequencies and analog bandwidth. The unshrouded design offers no shielding from external RF or EMI. For applications above 50MHz or with sensitive analog measurements, consider external shielding or alternative connectors with integrated ground planes.
• How does the MTSW-132-13-L-D-990 compare to spring-probe test connectors when used in burn-in or validation environments? The MTSW-132-13-L-D-990 is a permanent through-hole connector intended for board-to-board or cable interconnection, not temporary testing. In burn-in environments, spring-probe or pogo-pin connectors offer non-destructive repeated contact, while the MTSW-132-13-L-D-990 requires permanent soldering. The gold-plated mating surfaces of the MTSW-132-13-L-D-990 provide better corrosion resistance than typical spring probes for long-term use. However, if your validation protocol requires temporary test access without PCB modification, the MTSW-132-13-L-D-990 is unsuitable; a separate test connector or flying leads would be necessary. If permanent interconnection is acceptable, the MTSW-132-13-L-D-990 avoids probe wear and delivers stable contact resistance across thousands of hours.
• What is the electrical path and current distribution in a fully loaded MTSW-132-13-L-D-990 when 64 pins carry mixed signal and power levels? The MTSW-132-13-L-D-990 contains 64 independent male pin positions, each rated for 3A continuous current. Total system current capacity is not limited by the connector itself but by individual pin thermal effects and solder joint heating. If all 64 pins carry maximum current (theoretical 192A), resistive heating from the phosphor bronze contact resistance and tin-plated post resistance will generate significant heat at each joint. Current distribution is determined by circuit topology and load impedances, not by the connector. The 0.100" (2.54mm) pitch between rows means power and ground pins must be interspersed to manage return paths. For high-current applications, dedicate multiple pins to power and ground distribution rather than loading signal current on all64 positions. Verify PCB trace widths and layer stack to handle current density without thermal runaway.
• Is the MTSW-132-13-L-D-990 suitable for applications requiring frequent firmware updates or field reconfiguration? The MTSW-132-13-L-D-990 is a passive connector with no integrated electronics or firmware support. It serves only as an electrical interconnect between two PCBs or a cable and a board. If your application requires frequent connection/disconnection (e.g., swapping daughterboards for firmware updates), the push-pull fastening mechanism is designed for repeated engagement. However, thermal cycling during repeated use may accelerate fatigue of through-hole solder joints. The gold-plated mating contacts will eventually wear from repeated insertions. For field-reconfigurable systems, specify a connector designed for higher cycle ratings or consider mechanical guides to reduce lateral forces during insertion. The MTSW-132-13-L-D-990 is best suited for permanent or semi-permanent installations rather than daily field swaps.
• What are the RoHS and supply chain considerations when designing with the MTSW-132-13-L-D-990? The MTSW-132-13-L-D-990 is RoHS3 Compliant, meeting EU Directive 2011/65/EU restrictions on lead, cadmium, mercury, hexavalent chromium, PBBs, and PBDEs. The gold plating (10.0µm on mating surfaces) and tin plating (posts) are RoHS-compatible. ECCN classification is EAR99 (General Commercial), allowing standard export without license restrictions in most markets. HTSUS code 8536.69.4040 applies for customs classification. The Samtec MTSW series is actively manufactured by a Tier 1 supplier, ensuring long-term availability. However, verify lead times with your distributor, as custom or high-volume orders may require minimum quantities. The MSL 1 rating allows unlimited storage without environmental controls, reducing cost of goods sold for inventory management.
• How should PCB layout account for the 0.100" (2.54mm) spacing and through-hole solder joints of the MTSW-132-13-L-D-990? The MTSW-132-13-L-D-990 requires through-hole vias for each of the 64 pin positions spaced at 0.100" (2.54mm) pitch in two rows. Via diameter must accommodate the 0.140" (3.56mm) solder post without clearance violations; minimum via size is typically 0.035" (0.89mm) for a 0.025" (0.64mm) pad ring on each side. Trace routing under the connector is constrained by via placement; escape routing depends on layer count and trace width. The 2-row configuration spans 0.100" vertically, requiring careful escape planning to avoid conflicts with adjacent components. Solder mask clearance around via pads must prevent solder bridges between pins. Via-to-via spacing of 0.100" (2.54mm) leaves minimal room for trace insertion; bus topology or ground fills between signals help manage crosstalk. Thermal relief via design is recommended to maintain solder joint strength while allowing controlled thermal connection to ground planes.
• Can the MTSW-132-13-L-D-990 support high-speed differential signaling or LVDS protocols? The MTSW-132-13-L-D-990 provides no impedance matching, controlled spacing, or return path management required for high-speed differential pairs. Each pin carries independent signals with no predefined pairing or symmetry. Differential signaling (LVDS, CML, or PECL) requires precise impedance control, tightly coupled transmission lines, and matched signal routing. The 0.100" (2.54mm) pitch and unshrouded design offer no built-in shielding or impedance continuity. If differential protocols are required, routes must be manually length-matched and placed on inner layers with ground plane returns. Common-mode noise rejection sufers without shielded differential pairs. For LVDS or higher-speed protocols, consider specialized high-speed connectors with integrated transmission line geometry or external twisted-pair cabling. The MTSW-132-13-L-D-990 is best suited for parallel bus interfaces, power distribution, or low-frequency digital/analog signals below 50MHz.
• What are the long-term reliability risks when the MTSW-132-13-L-D-990 operates at the extremes of its temperature range? The MTSW-132-13-L-D-990 is rated from -55°C to 125°C, with the polyester glass-filled insulation maintaining structural integrity across this span. However, long-term reliability concerns emerge at the extremes. At -55°C, the contact material (phosphor bronze) becomes more britle, and insertion force increases; repeated mating cycles risk fracturing the contact springs or cracking solder joints due to reduced ductility. Thermal cycling between -55°C and 125°C induces differential expansion between the connector body (polyester), contacts (phosphor bronze), PCB substrate, and solder joints (tin/lead-free), accelerating fatigue failure. The tin-plated solder posts are susceptible to whisker growth and oxidation at temperature extremes. The gold plating on mating contacts (10.0µm thickness) may develop micro-porosity or lose adhesion after thousands of thermal cycles. For aerospace, military, or extended-life industrial applications, specify burn-in testing or select connectors with higher cycle ratings and thicker plating. Standard MTSW-132-13-L-D-990 units are suitable for commercial temperature ranges with controlled thermal cycling.
• How does the unshrouded design of the MTSW-132-13-L-D-990 impact EMI/RFI performance in electromagnetically hostile environments? The MTSW-132-13-L-D-990 lacks housing shrouding, shielding cans, or integrated ferite cores that would attenuate electromagnetic interference. All 64 pin positions are directly exposed to external RF fields, making the connector susceptible to radiated EMI coupling. In environments with high RF power (industrial machinery, RF transmitters, or mobile base stations), unshielded signal lines on the connector may pick up noise, causing false triggers or data corruption. The 0.100" (2.54mm) pitch and 2-row configuration create loop areas that resonate at specific frequencies, amplifying certain EMI bands. If your application operates in electromagnetically hostile environments, external shielding (Faraday cage or shielded enclosure) is required around the connector or PCB assembly. Alternatively, select a shielded connector variant or route critical signals through shielded cables. The MTSW-132-13-L-D-990 is suitable for controlled laboratory, office, or mild industrial environments where EMI levels are low and controlled.
• What are the practical differences between the MTSW-132-13-L-D-990 and Samtec's alternative connector series when migrating designs? The MTSW-132-13-L-D-990 belongs to the Samtec Flex Stack MTSW series, which is characterized by 0.100" (2.54mm) pitch, cuttable headers, and unshrouded rectangular form. Comparable alternatives from Samtec include the FTSH series (dual-row headers with shrouding and higher durability), which offers improved EMI shielding and mechanical robustness but requires more PCB footprint space. The TSM series provides surface-mount alternatives with similar pitch and position counts. For space-constrained designs, Samtec's higher-pitch connectors (0.156", 0.200") reduce footprint but require-layout and may limit future expansion. Migration to alternative series impacts PCB routing, thermal management, and mechanical assembly. The MTSW-132-13-L-D-990 is the most cost-effective entry point for0.100" standard pitch; alternatives trade cost for enhanced features. Evaluate insertion force, cycle life ratings, and environmental resistance when considering migration.
• Can the MTSW-132-13-L-D-990 be used in applications requiring hot-swap or field replacement without powering down the system? The MTSW-132-13-L-D-990 is not designed for hot-swap operation and has no breaking capacity or surge protection built in. If you disconnect the connector while live current flows through pins, arc formation is possible at the gold-plated mating contacts, causing accelerated wear, contact erosion, or signal corruption. The push-pull fastening mechanism is mechanically smooth but offers no electrical protection during insertion or removal. For hot-swap applications, ad external protection: series resistors to limit inrush current, bypass capacitors to absorb transient energy, or a dedicated hot-swap controller managing sequenced connection. Alternatively, establish operational procedures requiring system shutdown before connector removal. If field replacement is anticipated, design the power management board to de-energize the connector pins before mechanical removal, protecting both the connector and downstream electronics from transient surges.
• How do solder joint reliability and fatigue life scale with increased pin count in the MTSW-132-13-L-D-990? The MTSW-132-13-L-D-990 has 64 pin positions, each requiring a through-hole solder joint on the PCB. Solder joint reliability is governed by lead-free solder fatigue under thermal cycling, mechanical vibration, or repeated mating. With 64 joints, the statistical probability of at least one premature failure increases relative to designs with fewer pins. Each tin-plated post interfaces with the solder joint; quality variability in plating thickness or solder wetting affects individual joint strength. Vibration environments (automotive, aerospace, industrial machinery) accelerate fatigue by inducing shear stress on solder filets. Stress concentration at the via-to-pad interface exacerbates cracking risk. PCB material selection (FR-4, polyimide) and glass-weave orientation influence joint durability. For vibration-critical applications, design solder joints with large fillet radii, use thicker copper traces for thermal spreading, and specify stress-relief scoring or conformal coating to dampen vibration. Test vehicles should include thermal cycling (-40°C to 85°C minimum, 1000+ cycles) followed by thermal-mechanical shock to validate joint robustness before production.
• What are the configuration and design trade-offs when choosing between single-row and dual-row pin assignments on the MTSW-132-13-L-D-990? The MTSW-132-13-L-D-990 is a 2-row configuration with 32 pins per row at 0.100" (2.54mm) spacing, spanning 0.100" vertically between rows. Signal assignment flexibility allows routing high-speed signals, power, or ground to either row. Trade-offs include: single-row routing simplifies trace escape and reduces via congestion but leaves one row underutilized; dual-row interleaving (e.g., alternating signal/ground) improves return paths and EMI performance but increases layout complexity and requires precise routing symmetry. If power delivery is critical, dedicate an entire row to power and ground pins, ensuring low-impedance distribution. For signal integrity in clock or differential routing, place ground pins adjacent to signal pins to establish controlled return paths. The cuttable design allows removing one row if single-row operation is preferable, reducing component footprint by half and saving PCB area.
• How should the MTSW-132-13-L-D-990 be protected in outdoor or weather-exposed enclosures? The MTSW-132-13-L-D-990 offers no integrated protection against moisture, UV, dust, or mechanical shock. The unshrouded design and polyester glass-filled insulation material (UL94 V-0 rated for flammability) do not provide weatherproofing. In outdoor or weather-exposed applications, external protection is mandatory: poting compounds or conformal coatings protect against moisture ingress and corosion; hermetic enclosures or sealed connectors prevent direct water contact; UV-stabilized plastics or metalic shielding guard against solar degradation. The gold plating on mating contacts (10.0µm) provides corosion resistance compared to bare copper or nickel, extending outdoor life. Solder joints exposed to salt spray environments are vulnerable to electrochemical corrosion and whisker growth, especially on tin-plated posts. Design enclosures with drainage and ventilation to prevent condensation accumulation around the connector footprint. Consider conformal coating with acrylic or urethane for cost-effective weatherproofing of the entire PCB assembly. For marine or harsh industrial environments, upgrade to marine-grade epoxy poting and specify stainless steel or gold-plated hardware.