ECC20MMDN

FAQFrequently Asked Questions

• Can Sullins Connector Solutions ECC20MMDN be used with a 1.57 mm (0.062 in) printed circuit board edge card? Sullins Connector Solutions ECC20MMDN is specified for female edge cards with a nominal 1.57 mm (0.062 in) thickness. Verify the mating card's finished thickness, copper pattern, edge bevel, and contact location before production because plating, solder mask, or board-thickness tolerances can affect insertion force and contact engagement.
• What PCB layout should I use for the Sullins ECC20MMDN right-angle card-edge connector? Sullins ECC20MMDN is a 40-position, two-row connector with 2.54 mm pitch and through-hole, right-angle solder termination. The PCB footprint should follow the manufacturer's recommended land pattern, including the 20 holes per row, row spacing, hole diameter, pad dimensions, connector body keepouts, and the mechanical clearance required for the inserted edge card.
• Is Sullins ECC20MMDN suitable for carrying high-speed digital signals or controlled-impedance interfaces? Sullins ECC20MMDN provides a 2.54 mm dual-row card-edge interface, but the supplied data does not define impedance, crosstalk, insertion-loss, or return-loss performance. It can be evaluated for lower-speed or electrically tolerant signals, while high-speed interfaces require a complete channel analysis that includes the edge-card geometry, contact transitions, routing, grounding, and measured signal-integrity results.
• Can Sullins ECC20MMDN carry power and ground through the same connector as signal lines? Sullins ECC20MMDN can be assigned mixed power, ground, and signal positions, but the connector description does not provide a complete current-rating or derating profile. Size each circuit using the actual contact resistance, temperature rise, PCB copper, number of adjacent energized contacts, and expected continuous current, and reserve additional ground contacts where return-current inductance or noise control requires it.
• What should I check when replacing an older 40-position 0.100-inch card-edge connector with Sullins ECC20MMDN? When replacing an older connector with Sullins ECC20MMDN, compare more than pin count and pitch. Check the two-row contact numbering, mating side, right-angle orientation, through-hole pattern, card thickness, body envelope, mounting-hole alignment, insertion depth, contact wipe, solder-tail dimensions, and the position of keying or polarization features. A 40-position connector with the same 2.54 mm pitch may still be mechanically or electrically incompatible.
• Can Sullins ECC20MMDN replace a Samtec or other manufacturer's 40-position card-edge connector? Sullins ECC20MMDN may be considered as a replacement for a Samtec or other manufacturer's 40-position card-edge connector only after a dimensional and electrical comparison. Match the 1.57 mm card thickness, two-row 2.54 mm contact spacing, right-angle through-hole mounting, contact numbering, mating envelope, contact plating, insertion-force range, current and voltage ratings, and environmental requirements; the same nominal position count does not establish interchangeability.
• How does the 30 microinch gold finish on Sullins ECC20MMDN affect repeated insertion and removal? Sullins ECC20MMDN uses a 30.0 microinch (0.76 micrometre) gold contact finish. Repeated mating life depends on the mating contact finish, contact normal force, insertion alignment, contamination, and mechanical wear. For serviceable equipment with frequent card swaps, qualify the complete connector-and-edge-card pair through insertion-cycle testing rather than assuming that the gold finish alone defines the usable cycle count.
• Can Sullins ECC20MMDN be used in an industrial enclosure operating from -65°C to 125°C? Sullins ECC20MMDN has a listed operating-temperature range of -65°C to 125°C. The complete assembly must also meet the temperature limits of the edge-card laminate, solder joints, PCB materials, cable or board attachments, and mating connector. At temperature extremes, validate contact resistance, insertion force, dimensional tolerance, vibration performance, and thermal expansion across the full operating cycle.
• How should Sullins ECC20MMDN be handled and stored before PCB assembly? Sullins ECC20MMDN is listed as MSL 1 with unlimited moisture exposure under the applicable handling conditions, and it is supplied in tray packaging. Keep contacts protected from dirt, oils, and mechanical damage, avoid bending or scraping the mating surfaces, and use an assembly process that controls solder temperature and alignment. MSL 1 status does not remove the need to follow the connector manufacturer's soldering and packaging guidance.
• Does Sullins ECC20MMDN provide protection against incorrect card insertion? Sullins ECC20MMDN is described as a 40-position male connector that fits female edge cards, with no listed keying or flange feature. If the application has multiple possible card orientations or incompatible replacement cards, implement polarization through the PCB and edge-card geometry, a separate keying mechanism, connector placement, or system-level coding. Do not rely on the contact count or connector body alone to prevent misinsertion.