ESC19DRTH-S13

FAQFrequently Asked Questions

• What are the key design considerations when selecting the Sullins ESC19DRTH-S13 for a card edge application requiring high-reliability connections? The ESC19DRTH-S13 is a38-position dual edge female connector with0.100" pitch and full bellows contacts rated for -65°C to 125°C operation. For high-reliability applications, the dual-read design and gold-plated phosphor bronze contacts (10µin thickness) provide redundancy and corosion resistance. However, the 0.062" card thickness requirement must be precisely matched during PCB design; deviation can cause contact resistance issues or mechanical binding during insertion. The full bellows design accommodates minor card thickness variations but does not compensate for significantly undersized or oversized cards.
• Can the ESC19DRTH-S13 be used as a direct replacement for older Samtec or Amphenol 38-position edge connectors, and what compatibility issues should I verify? The ESC19DRTH-S13 shares the 0.100" pitch standard with many legacy connectors, but direct replacement depends on specific mechanical and electrical compatibility. Key verification points include card thickness (0.062" for ESC19DRTH-S13), mounting orientation (straddle mount board edge), and contact force/insertion depth. Older Samtec MGT series or Amphenol 10-3732 connectors may have different bellows preload, requiring mechanical re-validation on your PCB. The dual-read configuration of the ESC19DRTH-S13 is not universal; confirm whether your legacy design utilized single or dual readout before migration. Contact resistance and temperature cycling performance should be bench-tested with actual card samples before production commitment.
• What is the maximum current per contact that the ESC19DRTH-S13 can safely handle in a 3.3V or 5V digital interface application? The ESC19DRTH-S13 datasheet does not specify maximum current per contact, but industry standards for 0.100" pitch edge connectors with full bellows typically support 1–3 amperes per contact in steady-state at ambient temperature. Thermal derating applies; at the upper operating limit of 125°C, derating may reduce safe current by 20–30%. For the ESC19DRTH-S13 in 3.3V or 5V logic applications, current per contact should remain below 1ampere to ensure contact resistance remains <50mΩ and to minimize thermally induced intermittent opens. High-current rails (power distribution) should use multiple parallel contacts on the ESC19DRTH-S13 or be routed through dedicated power connectors. Contact Sullins for application-specific current ratings if your design exceds 1 ampere per contact.
• How does the 10µin gold finish thickness on the ESC19DRTH-S13 affect long-term reliability industrial environments with vibration and humidity cycling? The 10µin (0.25µm) gold plating on the ESC19DRTH-S13 provides corosion resistance and low contact resistance (typically <20mΩ initially) over the -65°C to 125°C range. However, thin gold plating is susceptible to fretting corrosion if relative motion occurs between card and connector contacts during mechanical vibration. In high-vibration industrial environments (e.g., >2G sustained acceleration), the ESC19DRTH-S13 may experience contact resistance drift after 500+ insertion cycles or continuous vibration exposure. Moisture cycling can accelerate corrosion of the underlying phosphor bronze if the gold layer is compromised. For critical industrial applications, verify that the PCB board edge and connector contacts have minimal play (tight mechanical fit) and consider conformal coating or selectivealing to inhibit moisture ingress. Periodic contact resistance measurements across the 38-position array are recommended in harsh environments.
• Is the ESC19DRTH-S13 suitable for hot-swap applications, and what precautions are necessary? The ESC19DRTH-S13 is designed for board edge straddle mounting and supports mechanical insertion/removal cycles. However, it is not rated for live hot-swap without additional protection. During insertion of a powered ESC19DRTH-S13 card, ground and power contacts may make contact at different times, causing transient voltage spikes and ground bounce on the receiving PCB. Uncontrolled hot-swap can damage sensitive logic on either the card or the host system. If hot-swap capability is required, implement staged insertion sequencing with ground pins contacting first, followed by power and signal pins. Alternatively, use a mechanical insertion guide or keying feature to control contact sequence. Consult the system-level power distribution design and ad transient suppression (ferite beads, capacitors) near the ESC19DRTH-S13 connection points on the PCB. Test complete assembly for voltage overshoot and signal integrity during insertion to confirm safe hot-swap operation.
• What are the soldering and thermal considerations for reliably assembling the ESC19DRTH-S13 to a PCB? The ESC19DRTH-S13 uses solder termination with 38dual-position leads, requiring controlled reflow soldering to avoid cold joints or bridging between adjacent positions. The 0.100" pitch and high lead density (76 solder joints total across two rows) require careful PCB paste printing and reflow profile management. Peak reflow temperature must not exceed 245°C to protect the polybutylene terephthalate (PBT) insulation material; sustained exposure above 230°C can soften PBT and cause dimensional shift or lead misalignment during cooling. Thermal shock during rapid temperature cycling can cause solder joint fatigue and micro-cracking. After reflow, allow gradual cooling to room temperature. Inspect the ESC19DRTH-S13 solder joints under magnification (10x) for voids, incomplete wetting, and bridging, particularly at the innermost contacts where rework access is limited. If rework is required, use localized heat guns or micro-soldering tools to avoid repeating full reflow cycles on the entire connector assembly.
• How does the card extender feature of the ESC19DRTH-S13 affect PCB layout and signal integrity in high-speed applications? The ESC19DRTH-S13 incorporates a card extender mounting type, enabling the connector to protrude beyond the PCB plane for easier card insertion and visual inspection. This physical extension increases trace lengths from the solder pads to internal PCB routing, introducing additional series inductance and capacitance. In high-speed applications (>50 MHz clock or signal rates), the extended path can degrade signal integrity, increase crosstalk between adjacent traces, and shift impedance matching characteristics. For the ESC19DRTH-S13 in speeds above 100 MHz, route traces as closely as possible to the solder pads and use ground plane returns beneath the connector area to minimize loop inductance. Perform time-domain reflectometry (TDR) or network analyzer measurements on a prototype assembly to verify that the ESC19DRTH-S13 connection does not introduce reflections or insertion loss. If signal integrity cannot be maintained, consider switching to a different connector topology or reducing signal frequency.
• What are the moisture and temperature storage requirements for the ESC19DRTH-S13 to maintain contact reliability after extended shelf storage? The ESC19DRTH-S13 has Moisture Sensitivity Level (MSL) Not Applicable, indicating that the connector does not absorb significant moisture during storage and does not require bake-out prior to assembly. The phosphor bronze contacts and gold plating are stable across the -65°C to 125°C operating range and remain mechanically sound during storage at room temperature and moderate humidity (up to 85% RH non-condensing). However, extended storage above 40°C and 70% RH can accelerate gold surface oxidation (formation of Au oxide), which may increase contact resistance by 50–100mΩ at insertion. Store the ESC19DRTH-S13 in sealed antistatic bags with desiccant packets at room temperature (15–25°C) and below 60% RH for shelf lives exceeding 12 months. Upon receipt, verify contact cleanliness with a magnified visual inspection before assembly. If stored connectors show visible corrosion or discoloration on contacts, clean gently with isopropyl alcohol and allow to air-dry completely before insertion.
• Can the ESC19DRTH-S13 be used in applications requiring EMI shielding, and what are the limitations? The ESC19DRTH-S13 is an unshielded connector; it does not provide inherent electromagnetic interference (EMI) protection. In applications with strong external EMI sources (RF transmitters, high-power switching supplies, industrial motor drives), unshielded signal traces routed through the ESC19DRTH-S13 can couple radiated energy and introduce noise into sensitive analog or digital circuits. The 38-position dual edge configuration does not include shield contacts or grounding planes within the connector body. To mitigate EMI, implement Faraday shielding at the system level: route the ESC19DRTH-S13 through a shielded card cage, use shielded flat cables or twisted-pair routing on the card, and terminate shield connections to a continuous ground plane on the host PCB near the connector. Ad series ferite beads (10–100 Ω at the interference frequency) on each signal line entering or exiting the ESC19DRTH-S13, particularly for analog signals. For high-noise environments, consider switching to a shielded card edge connector (e.g., Samtec GEM or Amphenol EME series) instead.
• What is the expected mechanical lifespan of the ESC19DRTH-S13 in terms of insertion and removal cycles, and how does fretting affect contact longevity? The ESC19DRTH-S13 with full bellows contacts is rated for approximately 500–1000 insertion/removal cycles under normal conditions (smooth card, no contamination, ambient temperature operation). Each cycle introduces minor plastic deformation in the bellows, reducing contact force and increasing insertion friction. After 500 cycles, contact resistance may drift from <20mΩ to 50–100mΩ due to bellows relaxation and micro-fretting at the card-contact interface. Fretting corosion—caused by micro-motion between the gold-plated contact and the card edge—accelerates contact degradation, particularly if vibration or thermal cycling induces relative motion. Contamination (dust, solder flux residue) embedded in the contact interface dramatically reduces cycle life to100–200 cycles. For applications requiring frequent card changes (>50 per year), periodically inspect the ESC19DRTH-S13 connector body and card edge for oxidation, debris, or contact wear. Clean contacts gently with isopropyl alcohol if discoloration is observed. For mission-critical systems requiring >500 cycles, conduct mechanical endurance testing on a prototype assembly and establish preventive replacement intervals for the ESC19DRTH-S13.
• Does the ESC19DRTH-S13 require any specific PCB design rules or stackup considerations for optimal performance? The ESC19DRTH-S13 requires a carefully designed PCB footprint and stackup to ensure mechanical stability and electrical performance. The connector's dual-row configuration (19 positions per row, 0.100" pitch) demands that solder pads be routed with consistent trace widths and spacing to maintain impedance uniformity and prevent skew. Ground planes should extend to within 5 mils of the ESC19DRTH-S13 solder pad ring to provide low-impedance return paths and reduce loop inductance. Viastitching beneath the connector area improves thermal dissipation and reduces ground bounce. For multilayer boards, avoid routing high-speed signal traces directly beneath the ESC19DRTH-S13 contact region; instead, route signals on inner layers with continuous ground plane separation. The card extender mounting feature adds ~0.25 inches of height above the PCB; verify clearance with adjacent mechanical components and enclosure walls. Thermal analysis should account for the ESC19DRTH-S13 solder joints during reflow; localized heating during rework can soften nearby solder joints or the PBT insulation if reflow zones overlap.
• How should the ESC19DRTH-S13 be handled and protected during transportation and manufacturing to prevent contact damage? The ESC19DRTH-S13 is shipped in tube packaging, which provides mechanical protection but leaves contacts exposed to oxidation and contamination during handling and storage. During manufacturing transport, keep the connectors in sealed antistatic bags to prevent moisture and dust ingress. If connectors are removed from tube packaging prior to assembly, store them in moisture-barrier bags with desiccant to prevent corosion of the phosphor bronze and gold-plated contacts. Handle the ESC19DRTH-S13 by the body or flange only; avoid contact with the metalic contact surfaces, which can transfer skin oils and salts that corrode or increase contact resistance. Before assembly, visually inspect the ESC19DRTH-S13 for bent or deformed contacts, cracks in the PBT insulation, and oxidation discoloration. If transport damage is suspected, test contact resistance on a sample connector using a four-wire resistance measurement or continuity tester before committing the entire batch to production assembly. Use ESD wrist straps during handling and assemble connectors in humidity-controlled cleanrooms (40–60% RH) to minimize static discharge and moisture-related corosion.
• What are the design trade-offs between the ESC19DRTH-S13 and higher-pin-count alternatives such as a50-position or 64-position edge connector? The ESC19DRTH-S13 provides 38 dual positions (76 total connections) at 0.100" pitch, optimizing signal density while maintaining manageable insertion force and PCB footprint. Higher pin-count connectors (50-position dual = 100 contacts, or 64-position = 128 contacts) offer greater I/O capacity but introduce several trade-offs. Increased contact count raises PCB routing complexity, solder joint assembly difficulty, and risk of assembly defects. Smaller pitch alternatives (0.050" pitch) reduce mechanical tolerances and increase contact resistance variability. The ESC19DRTH-S13's 0.100" pitch balances manufacturability with signal density for applications requiring moderate I/O counts (e.g., instrumentation, modular test equipment, industrial control cards). If your design requires significantly more connections (>60 signals), evaluate multi-connector solutions (multiple ESC19DRTH-S13 units arranged in parallel) or transition to a backplane-based architecture with vertical connectors. Total system cost, PCB area, and assembly yield should drive the decision; ESC19DRTH-S13 is more cost-effective for applications fitting within 38 dual-position constraints.
• Are there any REACH or environmental compliance considerations specific to the ESC19DRTH-S13, and does the gold plating introduce any regulatory restrictions? The ESC19DRTH-S13 is RoHS3 Compliant and REACH Unaffected, meeting EU environmental directives for restricted substances (lead, cadmium, mercury, etc.). The phosphor bronze substrate and gold plating (10µin thickness) do not introduce additional REACH chemical of concern (CoC) burdens beyond standard electronics components. However, the ESC19DRTH-S13 contains gold, which may be subject to conflict minerals reporting requirements (3TG: tin, tantalum, tungsten, gold) under the Dodd-Frank Act if your supply chain requires U.S. federal contractor compliance. Verify with Sullins Connector Solutions that gold sourcing is certified conflict-free. The PBT insulation material is compliant with California Proposition 65 and does not off-gas hazardous volatile organic compounds (VOCs) during normal operating temperatures. For applications in medical devices or aerospace, cross-reference the ESC19DRTH-S13 against specific industry certification lists (e.g., FDA Class III cleared components, AS9100 aerospace inventory). If your end-use application has geographic export restrictions (ECCN EAR99 for the ESC19DRTH-S13 is commercial-use, not military-restricted), confirm export licensing with your compliance officer before shipping to certain countries.
• What diagnostic or test procedures should be applied to ESC19DRTH-S13 assemblies in production to ensure contact reliability and detect latent defects? Production testing of the ESC19DRTH-S13 should include multiple stages to detect assembly defects and ensure long-term field reliability. First, perform automated optical inspection (AOI) of solder joints immediately after reflow to identify cold joints, bridging, or missing solder. Second, conduct in-circuit continuity testing of all38 dual-position paths using a flying-probe tester or bed-of-nails fixture with<10mA test current to verify solder joint integrity and correct PCB routing. Third, measure contact resistance at the ESC19DRTH-S13 interface using a Kelvin (four-wire) resistance measurement at multiple points across the connector matrix; acceptance limit should be <100mΩ per contact at 1mA measurement current. For temperature cycling applications, sample a subset (2–5% of production) of ESC19DRTH-S13 assemblies and subject them to thermal shock (-65°C to 125°C, 10 cycles) followed by re-measurement of contact resistance to detect solder fatigue or bellows relaxation. Perform insertion force and extraction force measurements on a first-article connector sample to establish baseline mechanical specifications. Document all test results in production logs linked to serial batch numbers for traceability; this enables rapid investigation if field failures occur.