FCC17C37PC44B

FAQFrequently Asked Questions

• Can the FCC17C37PC44B be used as a direct replacement for older 37-pin D-Sub connectors in legacy industrial equipment? The FCC17C37PC44B is a right-angle, through-hole solder mount connector with a 37-position, 2-row configuration in size 4 (DC, C) shell. While it is mechanically compatible with standard D-Sub footprints, direct replaceability depends on your existing design. If your legacy system uses straight connectors rather than right-angle, or if it employs a different mounting method (such as panel-mount instead of PCB through-hole), the FCC17C37PC44B will require PCB redesign. The gold-plated machined contacts and 5A current rating of the FCC17C37PC44B are suitable for most signal and low-power applications, but verify that your original design did not rely on non-standard pin assignments or higher current ratings before committing to the replacement.
• What are the thermal and environmental limits of the FCC17C37PC44B in outdoor or high-temperature industrial applications? The FCC17C37PC44B operates across -40°C to 85°C, which covers most industrial and commercial environments. However, it is not rated for extreme outdoor conditions without additional environmental protection. The thermoplastic dielectric material and tin-plated steel shell provide baseline moisture resistance (MSL 1, unlimited moisture sensitivity), but long-term exposure to high humidity, salt spray, or thermal cycling can degrade the tin plating over time. For harsh outdoor applications, consider supplementary conformal coating, sealed connector backshells, or periodic contact inspection. The 5A current rating assumes ambient conditions; at elevated temperatures near 85°C, continuous high-current draws may require thermal analysis to prevent contact resistance rise.
• Is the FCC17C37PC44B suitable for high-speed digital or analog signal integrity applications, and what impedance characteristics should I expect? The FCC17C37PC44B is designed for standard signal-level applications and is not specified for controlled impedance or high-speed digital signaling. The connector lacks coaxial shielding on individual contacts, making it unsuitable for differential pair routing or high-frequency applications above several megahertz. If your design requires high-speed signal integrity (USB, Ethernet, or RF), alternative shielded or coaxial connectors are necessary. The FCC17C37PC44B is well-suited for legacy parallel communication buses (RS-232, parallel data, industrial discrete signals) where signal integrity margins are generous and frequencies remain below 1 MHz.
• How does the gold-plated contact finish of the FCC17C37PC44B affect mating cycles and contact resistance over time? The FCC17C37PC44B features gold-plated machined contacts with a thickness of 15.0µin (0.38µm) over a phosphor bronze base. This thin gold plating is sufficient for typical commercial mating cycles (hundreds to low thousands) and provides excellent initial low contact resistance. However, the thin plating (0.38µm) is more prone to wear-through than thicker gold platings (> 2µm) during frequent unmating or in high-vibration environments. In applications with frequent connections or vibration, monitor contact resistance periodically; if resistance rises above 50mΩ per contact, contact degradation may be occurring. For long-term reliability in harsh vibration environments, consider connectors with thicker gold plating or palladium-nickel underlayers.
• What is the exact pin layout and contact arrangement of the FCC17C37PC44B, and can I verify compatibility with my legacy DB37 equipment? The FCC17C37PC44B is a 37-position D-Sub in a size 4 (DC, C) shell with 2 rows of pins in a standard D-Sub arrangement (19 pins in the upper row, 18 in the lower row). This layout is consistent with the RS-449 and legacy computer interface standards. Before assuming compatibility, verify three factors: (1) pin assignment—your legacy equipment may use a different pin-out subset or signal assignment; (2) connector orientation—the FCC17C37PC44B is a plug with male pins, so it must mate with a female receptacle on your legacy system; and (3) shell size consistency—confirm that both connectors use the same size 4 shell. Obtain or cross-reference the original equipment's connector documentation to avoid signal misrouting.
• Does the FCC17C37PC44B comply with modern environmental standards, and what are the constraints for use in new product design? The FCC17C37PC44B is RoHS non-compliant, meaning it contains lead solder or lead-bearing finishes. This designation restricts its use in new product designs destined for European markets or applications subject to RoHS Directive 2002/95/EC. If your product targets the EU, China, or other RoHS-enforcing regions, sourcing an RoHS-compliant variant (if available from Amphenol ICC) is mandatory. For domestic or non-regulated markets, RoHS non-compliance poses no legal barrier, but clarify your target market and regulatory requirements before design finalization. The MSL 1 rating indicates the connector can be stored indefinitely without moisture bake-out.
• How do I secure the FCC17C37PC44B to the PCB, and are there any soldering process considerations I should follow? The FCC17C37PC44B is mounted as a through-hole, right-angle connector with solder termination. The board-side flange features 4-40 threaded mounting holes for mechanical stabilization. During assembly, insert the connector through the PCB alignment holes and solder all 37 pins and ground indents simultaneously using standard wave or reflow soldering. The thermoplastic dielectric material has a UL94 V-0 flammability rating, which means it can tolerate reflow temperatures (typically 240–260°C peak) without degradation. After soldering, inspect solder joints for cold-solder conditions or insufficient fill, as the 37-pin density and right-angle geometry can trap flux and obscure visual inspection. Use the mounting brackets to mechanically anchor the connector to the PCB before potting or conformal coating to prevent strain on solder joints during thermal cycling.
• What substitutes or alternatives should I consider if the FCC17C37PC44B becomes obsolete, and how do they compare? The documented substitutes for the FCC17C37PC44B include part numbers 09654666816, 09654236800, 09664227801, 09654627816, and 09654666810 (all Amphenol ICC variants). These alternatives may differ in shell finish (tin vs. nickel), gold plating thickness, dielectric material, or RoHS compliance. Before substitution, cross-reference the alternative's datasheet against your original design requirements: verify the mounting method (right-angle vs. straight), termination type (solder vs. IDC), shell size, and operating temperature range remain unchanged. If sourcing constraints force a substitution with a different shell size (e.g., size 3) or contact pitch, redesign of the connector footprint is unavoidable. Document all substitutions in your design change order and retest the electrical and mechanical interfaces.
• What is the voltage rating of the FCC17C37PC44B, and how does it apply to mixed analog and digital signal designs? The FCC17C37PC44B is rated for 200V, which establishes the maximum voltage that can be applied across any two contacts without risking arcing or dielectric breakdown. In mixed-signal designs, this rating applies to the DC bias voltage between the highest and lowest signal levels. For example, if your design carries both ±15V analog signals and 5V digital logic on separate pins, verify that the potential difference between any two pins does not exceed 200V under worst-case conditions (including transient overshoot or fault states). The 5A current rating and 200V voltage rating yield a power dissipation limit of approximately 1kW per connector; designs approaching this limit require thermal analysis to ensure gold contacts do not experience excessive heating.
• Can the FCC17C37PC44B support both shielded and unshielded twisted-pair wiring, and are there signal integrity concerns with the right-angle design? The FCC17C37PC44B does not provide internal shielding or filtering on individual pins, so both shielded and unshielded wire types can be soldered to the backshell contacts. However, the right-angle PCB mount design introduces a critical layout consideration: the connector sits close to the PCB surface, which can couple high-frequency noise from the board into adjacent wires. For shielded twisted pairs, ensure the shield is grounded to the connector's backshell or to a ground plane directly beneath the connector footprint. For unshielded wires, maintain physical separation between high-current power lines and sensitive analog signal lines to minimize crosstalk. The built-in grounding indents on the FCC17C37PC44B shell provide additional grounding contact area; utilize these in your PCB layout to reduce return-path impedance.
• Is the FCC17C37PC44B filtered or unfiltered, and does it include EMI suppression? The FCC17C37PC44B includes a filter feature and grounding indents but does not specify active EMI suppression (ferrite beads, capacitive filtering, or shielded cavities). The filter designation refers to the connector's internal architecture that reduces signal crosstalk between adjacent pins through physical separation and grounding geometry. For applications requiring active EMI suppression (industrial drive control, radio-frequency environments), add external filtering circuits or shielded backshells at the connector interface. The grounding indents provide a low-impedance ground reference for filtering networks; design your ground return path to leverage these indents directly to a ground plane.
• What wire gauge compatibility should I assume when designing a harness for the FCC17C37PC44B, and are there conductor size limitations? The FCC17C37PC44B datasheet does not specify wire gauge in the parameters, but as a 5A-rated solder-termination connector, it accommodates wire gauges typically from 24 AWG to 16 AWG for general signal and power distribution. For the full 5A current rating, use 16 AWG minimum to stay within industry standards for copper conductivity and voltage drop (typically < 100mV per foot at 5A). For low-power signal lines, 24 AWG or finer is acceptable. When mixing wire gauges in a single harness, ensure all wires intended for the same current path use consistent gauge; mismatches increase contact resistance and potential hot spots. If your design requires currents above 5A through a single pin pair, consider parallel pins or alternative high-current connectors.
• How should I route return paths and ground conductors through the FCC17C37PC44B to minimize noise and ensure signal integrity? Route ground and return conductors through the FCC17C37PC44B immediately adjacent to signal conductors (interleaved ground-signal pairing where possible) to maintain a low-impedance return path and reduce loop area. The FCC17C37PC44B's grounding indents and shell design provide a secondary ground reference; connect the connector shell and backshell ground to your PCB ground plane with multiple short traces (ideally < 0.5 inches) directly beneath the connector. Avoid routing high-speed clock signals or fast digital edges through the connector without a ground return immediately adjacent; this practice is critical for the unshielded FCC17C37PC44B in industrial environments where return-path inductance can couple noise into adjacent pins. For 37-pin layouts, allocate at least 4–6 pins specifically for ground return to ensure adequate current carrying and EMI suppression.
• What is the difference between the FCC17C37PC44B and other Amphenol ICC D-Sub variants, and when should I choose the FCC17 series over alternatives? The FCC17C37PC44B is part of the FCC17 series, which targets standard commercial D-Sub applications with solder termination and right-angle mounting. Amphenol ICC offers alternative D-Sub series (e.g., FCC03, FCC09) with different shell sizes, mounting methods (straight vs. right-angle), and termination types (IDC, press-fit). The FCC17 series is optimized for PCB design-in with through-hole soldering and modest current/voltage requirements (5A, 200V). If your application requires panel-mount straight connectors, higher current (> 10A per pin), or integrated EMI shielding, explore other Amphenol series. The FCC17C37PC44B's combination of 37-pin capacity, right-angle form factor, and 5A rating makes it suitable for legacy serial communication, parallel data buses, and industrial control interfaces where density and cost are balanced.
• Are there any vibration or mechanical shock concerns when using the FCC17C37PC44B in mobile or transportation applications? The FCC17C37PC44B is not explicitly rated for vibration or shock resistance according to standard MIL specifications. However, the connector's mounting brackets and through-hole solder termination provide reasonable mechanical robustness for light to moderate vibration environments (< 5g RMS). In high-vibration applications (automotive, rail, aerospace), the right-angle solder interface is vulnerable to stress concentration at the PCB interface, especially during thermal cycling combined with mechanical shock. Mitigation strategies include: (1) potting or conformal coating around the connector to dampen vibration transmission to the solder joints, (2) strain relief boots on the wire harness exit, and (3) mechanical anchoring of the connector via the 4-40 mounting holes directly to a reinforced PCB region or chassis. If sustained vibration > 5g is expected, specify a connector qualified to MIL-DTL-24308 or equivalent vibration standards.
• Can the FCC17C37PC44B be used in applications requiring frequent hot-swap or quick-disconnect operations? The FCC17C37PC44B is not designed for frequent hot-swap operations. As a solder-mount connector, it is permanently affixed to the PCB and not intended for repeated disconnection. Each mating cycle introduces mechanical wear on the gold-plated contacts; with only 15.0µin (0.38µm) gold thickness, the contacts can wear through after several hundred mating cycles in high-wear scenarios. If your application requires frequent cable or module disconnection, consider mated connector pairs (plug and receptacle that mate together) or use a separate quick-disconnect interface upstream of the FCC17C37PC44B. Alternatively, specify a high-cycle connector rated for thousands of mating operations with thicker gold plating (> 2µm).
• What conformal coatings or potting materials are compatible with the FCC17C37PC44B dielectric material? The FCC17C37PC44B uses thermoplastic dielectric material rated UL94 V-0. Standard conformal coatings (acrylic, urethane, silicone, parylene) are compatible with thermoplastic dielectrics. However, avoid potting materials that cure with high exothermic reactions (epoxy resins) or that generate solvents that can soften thermoplastics; instead, use polyurethane potting compounds or silicone-based encapsulants that cure without solvent release. Test a sample connector with your selected coating or potting material under your specified operating temperature range (-40°C to 85°C) to confirm no material incompatibility or stress cracking occurs during thermal cycling. Ensure coating thickness does not exceed the connector's specified maximum to avoid mechanical stress on the dielectric.
• How does the FCC17C37PC44B perform in corrosive or chemically aggressive environments, and what precautions should I take? The FCC17C37PC44B features tin-plated steel shell and gold-plated phosphor bronze contacts. Tin plating provides adequate corrosion resistance in dry industrial environments but is vulnerable to galvanic corrosion in high-humidity or salt-spray conditions (marine, coastal installations). The 15.0µin gold plating on contacts is resistant to most laboratory chemicals but can be compromised by prolonged exposure to strong acids or bases. In chemically aggressive environments, apply supplementary protection: (1) conformal coating on the entire connector assembly to block moisture and chemical ingress, (2) sealed backshells or boots to prevent condensation inside the connector cavity, and (3) periodic inspection of the connector shell and backshell for white corrosion products (tin oxide/sulfide) which indicate active corrosion. Consider upgrading to nickel-plated or stainless-steel shell variants if your environment is classified as C5-M (very high corrosivity per ISO 12944).
• What is the maximum current per pin for the FCC17C37PC44B when all 37 pins are simultaneously loaded? The FCC17C37PC44B is rated at 5A total connector current rating. When all 37 pins are simultaneously loaded with current, the practical limit per pin depends on the application's power distribution design. If all pins equally share the 5A budget, each pin would carry approximately 135 mA. However, the connector's total current capacity is shared among all pins; overloading any subset of pins to the full 5A per pin would violate the total rating and risk thermal runaway. In practice, power and ground pins should be limited to prevent hot spots; use multiple ground and power pins to distribute current and reduce contact resistance buildup. Calculate the total power dissipation at the connector interface: P = I² × R_contact × (number of loaded pins), and ensure thermal dissipation does not raise local junction temperatures above 85°C.
• Is the FCC17C37PC44B backward compatible with legacy 37-pin D-Sub connectors from other manufacturers, or are there subtle differences in pin spacing or shell dimensions? The FCC17C37PC44B conforms to the EIA D-Sub standard for 37-pin connectors (size 4, DC, C shell), which ensures mechanical and dimensional compatibility with legacy 37-pin D-Sub connectors from other manufacturers. Pin spacing (0.109 inches per row and 0.125 inches between rows) and shell dimensions follow EIA specifications. However, verify these subtle compatibility factors: (1) connector style—the FCC17C37PC44B is a plug with male pins and right-angle mounting; ensure your legacy receptacle is female and compatible with right-angle entry; (2) shell finish—legacy connectors may use chromium or other finishes that have different corrosion properties; (3) contact material and plating—gold-plated contacts may exhibit different mating force characteristics than nickel or tin-plated legacy contacts; and (4) operating temperature—verify the legacy connector shares the -40°C to 85°C range. Cross-reference the original equipment's connector part number and test a prototype mate before full-scale deployment to confirm electrical continuity and mechanical fit.