FGG.2K.310.CLAK90

FAQFrequently Asked Questions

• Can the FGG.2K.310.CLAK90 handle both wet and dusty industrial environments without degradation? The FGG.2K.310.CLAK90 carries an IP66/IP68 rating, meaning it is dust-tight and water-resistant to waterproof conditions. The chrome-plated brass shell and gold-plated contact finish resist corrosion in mixed industrial environments. However, sustained exposure to salt spray or harsh chemical atmospheres may require periodic inspection of the contact surfaces, particularly if the connector remains mated for extended periods without disconnection cycles that naturally clean the contacts.
• How does the 1.00µm gold plating thickness on the FGG.2K.310.CLAK90 compare to industry standards for 10-position circular connectors? The FGG.2K.310.CLAK90 specifies 39.4µin (1.00µm) contact plating, which falls within typical LEMO connector specifications for general industrial applications. This thickness provides adequate fretting corrosion resistance for standard mating cycles (typically 50–500 cycles before wear becomes noticeable). For applications exceeding 1000 mating cycles annually or requiring ultra-low contact resistance stability over years, thicker gold plating (2.0–3.0µm) may offer longer service life, though this would require selecting a variant part number or a different connector series.
• What cable diameter constraints should I consider when designing the cable assembly for the FGG.2K.310.CLAK90? The FGG.2K.310.CLAK90 has a cable opening range of 0.339" to 0.354" (8.60mm to 9.00mm). This dimension determines the maximum outer diameter of the cable jacket that can pass through the backshell. For a 10-position solder-cup design, typical cable assemblies range from 8.0mm to 8.8mm OD. If your cable diameter falls outside this window, you may need to resize the jacket, use a strain relief boot, or select an alternative shell size such as the 320 or 300 series.
• Is the FGG.2K.310.CLAK90 suitable for high-temperature aerospace or automotive underhood applications? The FGG.2K.310.CLAK90 has an operating temperature range of -55°C to +200°C, which accommodates many aerospace and automotive environments. However, aerospace applications typically require additional certifications (TSO, DO-160, or equivalent) and may mandate thicker gold plating or hermaphroditic contact designs not present in standard commercial LEMO connectors. For underhood automotive use, the 200°C upper limit is borderline; sustained temperatures above 180°C may accelerate contact oxidation and reduce mating cycle life. Consult application-specific standards (e.g., AEC-Q200) before finalizing design.
• Can I replace a Deutsch DT-series 10-pin connector with the FGG.2K.310.CLAK90, or are there mechanical and electrical incompatibilities? No direct replacement is possible without redesign. The FGG.2K.310.CLAK90 is a circular push-pull connector with a 310 shell size; Deutsch DT-series connectors use rectangular housings with different mating interfaces and keying systems. Even though both may carry 8A per contact, the physical size, mating force, insertion keying, and backshell attachment differ substantially. Pin-to-pin migration requires custom cabling and mechanical adapter plates, which introduce reliability risks. If a connector change is mandatory, evaluate LEMO's alternative series (e.g., FXP or ERG models) or consult with the component engineering team on the cost-benefit of redesign.
• What is the maximum total current I can safely draw through all 10 positions of the FGG.2K.310.CLAK90 simultaneously? Each contact in the FGG.2K.310.CLAK90 is rated at 8A, yielding a theoretical maximum of 80A across all 10 positions if every pin carries full load. However, practical thermal management depends on the specific cable gauge, mating cycle frequency, and ambient temperature. In a sealed connector environment, heat dissipation is limited; sustained operation at 80A may elevate internal contact temperatures above the design baseline. For critical designs, limit concurrent loads to 60–70A total, or consult thermal simulation or application notes from LEMO. Additionally, verify that the solder-cup termination is rated for the wire gauge and current density you intend to use.
• How do solder-cup terminals in the FGG.2K.310.CLAK90 compare to crimp contacts in terms of field replaceability and rework capability? Solder-cup terminals require a soldering iron and heat management; they are generally field-repaired with standard desoldering techniques or solder wick. Crimp contacts (found in other LEMO series such as the FGG with crimp inserts) demand a calibrated crimping tool and are less forgiving of operator variability but offer faster assembly in high-volume production. The FGG.2K.310.CLAK90 solder-cup design is well-suited for low-volume or custom applications where rework flexibility and minimal tooling investment are priorities. If high-frequency field terminations or rapid rework cycles are anticipated, evaluate crimp-insert variants as an alternative.
• Does the PEEK insert material in the FGG.2K.310.CLAK90 provide superior electrical isolation compared to glass-filled nylon inserts? PEEK (polyetheretherketone) in the FGG.2K.310.CLAK90 offers superior thermal stability, chemical resistance, and dimensional retention compared to glass-filled nylon. At temperatures above 120°C, PEEK exhibits minimal creep and maintains tighter insert tolerances, which reduces crosstalk and improves contact retention in high-vibration environments. For isolation performance, both materials achieve adequate insulation resistance at standard operating voltages (typically >10^6 Ohms). The advantage of PEEK is long-term reliability in extreme thermal cycling (-55°C to +200°C) rather than a fundamental electrical difference. For cost-sensitive or moderate-temperature applications, nylon-insert variants may suffice; specify PEEK if thermal cycling or chemical exposure is a design concern.
• What is the push-pull mating force for the FGG.2K.310.CLAK90, and could it be problematic in vibration-prone installations? LEMO does not publicly specify exact insertion or withdrawal forces for the FGG.2K.310.CLAK90 in standard datasheets; typical push-pull 2K series connectors require 5–15 N (1.1–3.3 lbf) of axial force. In high-vibration environments (e.g., military helicopters, industrial machinery), the combination of repetitive mating cycles and vibration can induce fretting corrosion on the backshell threads. To mitigate, use a secondary locking mechanism (safety wire, adhesive ring, or mechanical clip) if the connector is subject to >2 G acceleration or frequent vibration. Periodic torque verification (if a backshell thread exists) ensures the connector remains secure.
• How does the chrome plating on the FGG.2K.310.CLAK90 shell affect EMC performance, and should I add grounding straps for shielded cable? The chrome-plated brass shell provides EMI shielding and environmental corrosion protection. For optimal EMC performance, ground the shield to the backshell of the FGG.2K.310.CLAK90 through a 360° contact (typically included in standard backshell designs). Chrome plating does not degrade conductivity if the underlying brass is intact; however, if the shell is scratched during installation or thermal cycling, the exposed brass may corrode, raising shield impedance. Always use a dedicated ground return path and verify continuity across the mating interface with a multimeter before field deployment. In high-frequency applications (>100 MHz), consult transmission-line impedance calculations to ensure the connector geometry supports your required insertion loss and return loss specs.
• Can the FGG.2K.310.CLAK90 be used in medical or food-processing equipment where washdown and sanitization are required? The FGG.2K.310.CLAK90 meets IP66/IP68 ingress protection and is RoHS3 compliant, making it suitable for washdown and sanitization exposure. However, medical (ISO 13485) and food-processing applications often require additional certifications, material traceability, or biocompatibility testing not documented in standard product datasheets. Additionally, if washdown involves caustic alkaline or acidic cleaning agents, the chrome-plated brass shell may experience pitting corrosion over months of repeated exposure, especially in crevices near the backshell. For medical applications, verify compliance with specific device standards and consider stainless-steel variants or Teflon-coated housings if aggressive chemical exposure is expected. Food-industry applications generally tolerate the FGG.2K.310.CLAK90 design, but material certifications and cleaning chemical compatibility should be confirmed with LEMO technical support.
• What are the key differences between the FGG.2K.310.CLAK90 and the FGG.2K.320 series, and when would I choose one over the other? The primary difference between 310 and 320 shell sizes lies in cable diameter capacity and contact count flexibility. The FGG.2K.310.CLAK90 accommodates cables of 8.60–9.00mm OD and provides 10 positions; the 320 series typically supports larger cable diameters (9.5–10.5mm OD) and offers different pin counts (often 14 or 20 positions). Choose the 310 if your 10-pin signal configuration and cable size fit the envelope; select the 320 if you need more pins, thicker cables, or a physically larger connector frame. Mechanical dimensions of mating interfaces also differ, so switching between them requires redesign of both connector mounting and cable assembly. Evaluate footprint constraints and future expandability when making this decision.
• Is the FGG.2K.310.CLAK90 rated for unmanned aerial vehicle (UAV) or drone power distribution? The FGG.2K.310.CLAK90 carries an 8A per-contact rating and an operating range of -55°C to +200°C, which aligns with typical UAV power and signal interconnect requirements. However, UAV certifications and standards (e.g., military MIL-STD-1377 or commercial DO-160G) may impose additional requirements for vibration resistance, thermal cycling endurance, or contact plating thickness. The connector's solder-cup termination is suitable for small-format PCB integration but requires careful strain relief design to prevent solder-joint failure under the high vibration and thermal cycling characteristic of aerial platforms. If operating altitude exceeds 15,000 feet, verify that contact erosion from low-pressure arcing does not occur at your intended voltage levels; consult LEMO for altitude derating curves.
• How does the FGG.2K.310.CLAK90 perform in thermal shock scenarios, such as rapid transitions from -55°C to +85°C? The FGG.2K.310.CLAK90 is rated from -55°C to +200°C, but the thermal coefficient of brass (11–13 ppm/K) and PEEK insert material (47 ppm/K) differ, creating stress during rapid thermal transients. Repeated cycles between temperature extremes can induce contact creep, mechanical loosening of solder joints, and microcracking in the backshell material. To mitigate, ensure that cable strain relief is flexible and does not impose rigid constraints on the connector body during thermal cycling. Additionally, use thermal cycling test data (if available from LEMO) to confirm solder-joint reliability under your specific temperature profile. For applications exceeding 100 thermal cycles per year across the full range, consider conformal coating or potting of the solder-cup region to reduce vibration-induced loosening.
• What maintenance or inspection intervals should I establish for FGG.2K.310.CLAK90 connectors in field service, and how do I assess contact degradation? Field maintenance intervals depend on operating environment, mating frequency, and criticality. In benign indoor environments, annual visual inspection suffices; in harsh or marine environments, quarterly checks are prudent. Assess contact degradation by measuring contact resistance with a multimeter (expect <50 mΩ per mated pair for a new connector; rising above 200 mΩ signals wear or oxidation). Perform mating/unmating cycles under light load to observe insertion force changes; increasing force indicates contact buildup or contact plating wear. If resistance exceeds 500 mΩ or insertion force doubles, the connector should be replaced. Document baseline measurements after installation to establish a reference for trending. Maintain records of environmental exposure, temperature extremes, and mating cycles to predict service life.