929700-08-19-RK

FAQFrequently Asked Questions

• Can the 929700-08-19-RK header be used as a direct replacement for legacy 0.1" pitch connectors from other manufacturers? The 929700-08-19-RK maintains the standard 0.1" (2.54mm) pitch and 19-position single-row configuration common across the industry, making it compatible with existing mating connectors designed to this specification. However, verify that the mating connector accommodates the 929700-08-19-RK's 0.318" (8.08mm) contact mating length and unshrouded design. Some legacy systems used shrouded headers or different contact geometries; the 929700-08-19-RK's square contact shape and tin finish (200.0µin) are standard but should be confirmed against your existing PCB layout and connector inventory before substitution.
• What are the solder joint reliability considerations when using the 929700-08-19-RK in high-vibration industrial environments? The 929700-08-19-RK is through-hole mounted with a 0.310" (7.87mm) post length, providing robust mechanical coupling to the PCB. In vibration-prone applications, ensure adequate solder fillet formation around all 19 pins and consider conformal coating to prevent electromigration. The tin contact finish (5.08µm thickness) meets industrial durability standards, but thermal cycling between the -40°C to 105°C operating range can stress solder joints; use a solder alloy with appropriate creep resistance and verify PCB trace routing minimizes mechanical stress concentration near the header.
• Is the 929700-08-19-RK suitable for applications requiring a sealed connector interface? The 929700-08-19-RK is an unshrouded header with no ingress protection rating, making it unsuitable for sealed or potted applications without additional conformal coating or housing. If your design requires IP67 or equivalent environmental sealing, consider using the 929700-08-19-RK only in sealed subsystems where the header remains inside an enclosure, or evaluate sealed connector alternatives with backshells or covers designed for the 2.54mm pitch standard.
• What is the maximum continuous current per pin for the 929700-08-19-RK in a fully loaded 19-position configuration? Each pin on the 929700-08-19-RK is rated for 2.5A continuous current, but in a fully loaded 19-position header, thermal management becomes a design concern. With all 19 pins carrying full current, total power dissipation in the connector body increases; ensure adequate PCB thermal spreading, consider trace widths and layer stack to dissipate heat away from the header, and verify your system does not expect all pins to simultaneously carry maximum current without active cooling or thermal derating.
• Can the 929700-08-19-RK be safely used in hot-swap or edge-insertion applications? The 929700-08-19-RK is designed for board-to-board connections with push-pull fastening, not hot-swap edge-card insertion. Repeated insertion and removal can cause wear on the tin contact finish and degrade mating performance over time. If your application requires frequent disconnection, design the system to power down and de-energize the 929700-08-19-RK before physical disconnect to minimize arc damage and contact erosion, and specify a rated contact cycle life expectation from your quality validation testing.
• How does the PCT insulation material of the 929700-08-19-RK perform compared to older PBT formulations? The 929700-08-19-RK uses polycyclohexylenedimethylene terephthalate (PCT) insulation, which offers superior moisture absorption and dimensional stability compared to PBT, particularly in humid or thermal cycling environments. PCT maintains UL94 V-0 flammability rating and an MSL of 1 (unlimited moisture sensitivity), allowing the 929700-08-19-RK to be used in diverse climates without desiccant storage. If your legacy design used PBT headers, the 929700-08-19-RK's PCT insulation provides better long-term reliability in variable humidity conditions but should be verified compatible with your existing PCB material and surface finish.
• What are the assembly and rework considerations for the 929700-08-19-RK during manufacturing? The 929700-08-19-RK is bulk-packaged and features a breakaway design, allowing row segments to be separated for custom configurations if needed. During reflow soldering, the through-hole termination requires adequate solder volume and time at temperature; ensure your reflow profile accounts for the thermal mass of 19 copper pins and PCT insulation. Post-reflow rework, especially desoldering and re-insertion, can damage the tin plating and contact integrity; minimize rework cycles and use low-temperature rework techniques when possible. MSL-1 rating means no bake-out is required before assembly.
• Is the 929700-08-19-RK compatible with automated test equipment (ATE) with standard 2.54mm pitch probe cards? Yes, the 929700-08-19-RK's standard 0.1" pitch and square contact geometry align with common ATE probe specifications. However, verify probe card compliance with the 0.318" contact mating length and confirm probe pressure and alignment tolerances do not exceed the connector's mechanical limits. Unshrouded design means probe approach must be precise; use fixtured probe cards with positive alignment to prevent probe skew, which could cause contact wear or short circuits between adjacent pins.
• What precautions are needed when using the 929700-08-19-RK at temperature extremes within the -40°C to 105°C range? The 929700-08-19-RK's tin contact finish (5.08µm) and PCT insulation remain stable across the full -40°C to 105°C range, but repeated thermal cycling causes coefficient-of-thermal-expansion (CTE) mismatch between the header, PCB, and mating connector. Design solder joints with stress relief and avoid sharp trace corners near the header. At low temperatures, tin contact resistance may increase slightly; verify signal integrity and power delivery at -40°C during design validation. At 105°C, contact clamping force can relax; select mating connectors with sufficient spring force to maintain reliable contact throughout the operating range.
• How does the 929700-08-19-RK compare to alternative 19-pin connector solutions in terms of cost, size, and integration complexity? The 929700-08-19-RK offers a low-cost, compact through-hole header solution suitable for moderate-speed digital and power applications. Compared to alternatives: shrouded headers add cost and height but improve signal integrity and safety; edge-card connectors reduce PCB area but increase assembly complexity; IDC (insulation-displacement) connectors eliminate soldering but require precise crimping tooling and provide lower contact reliability over time. The 929700-08-19-RK's unshrouded design and solder termination make it ideal for prototyping, internal interconnects, and cost-sensitive production where environmental protection is not critical.
• What signal integrity issues should be considered when routing high-speed signals through the 929700-08-19-RK? The 929700-08-19-RK is optimized for low-frequency digital and analog signals in the audio and power distribution range; it is not recommended for high-speed differential signaling or clock rates above a few MHz. The unshrouded geometry provides minimal shielding, so crosstalk between adjacent pins increases with signal frequency. If routing clock signals or fast logic (>50 MHz), use separate ground pins (every 2-3 signal pins) to provide return paths, keep trace lengths matched, and validate timing margins during board bring-up. For speeds above 100 MHz, evaluate shielded or coaxial connector alternatives.
• Can the 929700-08-19-RK be used in medical device applications, and what certifications or additional testing are required? The 929700-08-19-RK is RoHS compliant, REACH unaffected, and carries UL94 V-0 flammability rating, meeting baseline regulatory requirements. However, medical device applications require additional validation: biocompatibility testing (if the connector contacts body fluids), shelf-life studies, sterility assurance if applicable, and design history documentation per IEC 62304 or equivalent. The 929700-08-19-RK's tin contact finish and PCT insulation are not inherently problematic for medical use, but your design must define the intended use environment, establish a quality assurance plan, and perform risk assessment per ISO 14971 to ensure the connector and assembly process meet medical device standards.
• What are the differences between the 929700-08-19-RK and other positions in the 3M 929 series, and how do I select the correct pin count for my application? The 929 series offers multiple pin counts (typically 2 to 40+ positions) with identical 0.1" pitch and mounting style; the 929700-08-19-RK specifically provides 19 positions. Select pin count based on your signal and power distribution needs: smaller counts (2-8 pins) suit simple interconnects and cost optimization, while larger counts (16-40 pins) reduce board area and connector count. Ensure your mating connector, PCB footprint library, and test fixtures all specify the same pin count; mixing pin counts can result in assembly errors or functional failures.
• How should the 929700-08-19-RK be stored and handled to maintain contact quality before assembly? The 929700-08-19-RK has MSL-1 (unlimited moisture sensitivity), requiring no special moisture storage conditions. However, store in a clean, dry environment (20-25°C, <60% RH) to prevent dust accumulation in the unshrouded contact cavities. Avoid static discharge; handle with wrist straps grounded to workbench earth. Do not touch contact surfaces with bare fingers, as skin oils and salts can degrade the tin finish and contact resistance. Keep the connector in its original bulk packaging or anti-static bags until assembly, and inspect visually for bent pins or damaged insulation before soldering.
• What is the expected contact resistance of the 929700-08-19-RK after mating, and how does it degrade with thermal cycling? The 929700-08-19-RK's tin contact finish (5.08µm) typically exhibits contact resistance in the range of 10-30 mΩ per pin when newly mated, depending on contact pressure and surface cleanliness. Thermal cycling (repeated temperature swings across the -40°C to 105°C range) can cause tin whisker growth, oxidation, and creep in the solder joint, potentially increasing contact resistance by 20-50% over 500+ cycles. For critical power distribution or precision analog applications, design the system to tolerate contact resistance variation, use lower-impedance signal levels, and validate actual contact resistance in your application through thermal shock testing before production release.