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HomeProductsConnectors, InterconnectsCard Edge Connectors - Edgeboard Connectors346-040-558-102
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346-040-558-102 - EDAC Inc.

Manufacturer Part Number
346-040-558-102
Manufacturer
EDAC Inc.
Allelco Part Number
98D-346-040-558-102
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
41,710 pcs available, New & Original
Parts Description
CONN EDGE SGL FMALE 40POS 0.125
Package
Box
Data sheet
346-040-558-102.pdf

Environmental Information

EDAC REACH.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 41710
  • Unit Price: $11.482
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $11.482 $11.48
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

346-040-558-102 Tech Specifications
EDAC Inc. - 346-040-558-102 technical specifications, attributes, parameters and parts with similar specifications to EDAC Inc. - 346-040-558-102

Product Attribute Attribute Value
Manufacturer EDAC Inc.
Termination Rows 1
Termination Solder, Wire Wrap
Series 346
Read Out Single
Pitch 0.125" (3.18mm)
Package Box
Operating Temperature -40°C ~ 105°C
Number of Rows 1
Number of Positions/Bay/Row 40
Number of Positions 40
Mounting Type Through Hole, Right Angle
Product Attribute Attribute Value
Material - Insulation Polyester Thermoplastic
Gender Female
Flange Feature Flush Mount, Top Opening, Unthreaded, 0.128" (3.25mm) Dia
Features -
Contact Type Cantilever
Contact Material Copper Alloy
Contact Finish Thickness 10.0µin (0.25µm)
Contact Finish Gold
Color Green
Card Type Non Specified - Single Edge
Card Thickness 0.054" ~ 0.070" (1.37mm ~ 1.78mm)
Base Product Number 346-040

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.69.4040

Frequently Asked Questions(FAQ)

What card thickness tolerance does the 346-040-558-102 connector accommodate, and how does this affect PCB edge design?
The 346-040-558-102 is engineered to accept cards with thicknesses between 0.054" and 0.070" (1.37mm to 1.78mm). This 0.016" tolerance window requires careful PCB edge planning during layout. Cards thinner than 0.054" may not seat fully and risk contact intermittency, while edges exceeding 0.070" can cause mechanical binding or contact wear on the cantilever springs. The female connector's design centers on this range, so tolerance stack-up during fabrication should account for plating thickness and routing precision. For edge connectors carrying signal or power, maintaining consistent thickness across the insertion area of the 346-040-558-102 prevents differential wear patterns that can degrade contact resistance over thermal cycling.
How does the 0.125" pitch specification of the 346-040-558-102 compare to standard 0.100" pitch connectors in mixed-signal applications?
The 346-040-558-102 uses 0.125" (3.18mm) pitch spacing, which is coarser than the common 0.100" (2.54mm) industrial standard. This wider pitch on the 346-040-558-102 provides several practical benefits: improved crosstalk immunity between adjacent signal lines due to increased separation, simpler PCB routing for controlled impedance traces, and reduced parasitic capacitance between conductors. The trade-off is board area efficiency—the 346-040-558-102's 40 positions span 5 inches of edge length compared to 4 inches for an equivalent 0.100" connector. In high-speed digital or analog precision circuits, the reduced electromagnetic coupling from the 346-040-558-102's wider pitch often justifies the footprint cost. Lower-frequency applications may find the extra spacing unnecessary.
What is the expected contact resistance performance of the 346-040-558-102 given its gold finish specification and cantilever contact design?
The 346-040-558-102 features gold-plated copper alloy contacts with 10.0µin (0.25µm) finish thickness, a specification that balances corrosion resistance with cost. At initial insertion, contact resistance is typically in the 10–50 mΩ range per contact, depending on insertion force and contact material compliance. The thin gold layer on the 346-040-558-102 provides protection against oxidation and fretting corrosion during thermal cycling between -40°C and 105°C, but does not significantly alter the base copper alloy's electrical properties. Cantilever contact design—used in the 346-040-558-102—exhibits mild resistance increase over 100–500 insertion cycles as the spring temper relaxes slightly and micro-abrasion patterns develop. For applications requiring contact resistance monitoring, budget 75–100 mΩ per contact after 200 thermal cycles on the 346-040-558-102 to account for natural aging.
Can the 346-040-558-102 accommodate both solder and wire wrap termination on the same connector, or must one method be selected during assembly?
The 346-040-558-102 is specified with dual termination capability: solder and wire wrap. However, practical assembly workflows typically commit to one termination method before production. The 346-040-558-102's through-hole tails are designed with sufficient length and cross-section to support either approach. Solder termination on the 346-040-558-102 is preferred for automated manufacturing and provides superior vibration resistance. Wire wrap on the 346-040-558-102 offers field replaceability and rework flexibility, making it attractive for prototype or low-volume builds. Mixing methods on a single 346-040-558-102 unit is not recommended because solder reflow temperature (typically 240–250°C peak) can degrade wire wrap connections if they were installed first, and conversely, wrapping around solder joints introduces mechanical stress and contamination risk. Select one termination method per board design.
What environmental considerations apply to the 346-040-558-102's polyester thermoplastic insulation material across its -40°C to 105°C operating range?
The 346-040-558-102 uses polyester thermoplastic for the insulation housing, a material chosen for its balance of cost, machinability, and thermal stability. Polyester maintains dimensional stability and electrical properties across the stated -40°C to 105°C range, but exhibits a glass transition temperature around 75–80°C, above which the material gradually softens. At the upper thermal limit (105°C), the 346-040-558-102's insulation becomes less rigid and may show minor creep under sustained contact pressure, though this does not affect electrical function. At -40°C, polyester becomes brittle; the 346-040-558-102 should not be inserted or removed under deep cold conditions to avoid cracking the flange or contact carrier. Humid environments accelerate moisture absorption in polyester, slightly increasing dielectric loss. For applications near 105°C continuous operation or in high-humidity climates, consider conformal coating or potting around the 346-040-558-102 to extend material life and maintain contact retention force.
How does the single-row, flush-mount design of the 346-040-558-102 affect board stackup planning and connector clearance in compact enclosures?
The 346-040-558-102 features a flush-mount flange (0.128" diameter unthreaded opening) and top-opening design, meaning the connector mounts directly to the PCB edge with minimal standoff. This single-row configuration eliminates the need for dual-row routing space, simplifying edge-connector PCB layout. The flush mount on the 346-040-558-102 allows the mating card to slide in without obstruction from backplane components, making it well-suited for modular or hot-swap applications. However, the through-hole termination on the 346-040-558-102 requires solder pad area on the opposite side of the PCB, limiting stackup options if the backside is densely populated. The 0.125" pitch of the 346-040-558-102 means that trace routing between connector pads and internal layers demands careful spacing to avoid via conflicts. In sealed enclosures, verify that the connector depth on the 346-040-558-102 (typically 0.6–0.8 inches) does not interfere with mating connector insertion or extraction.
What insertion force and engagement depth should be specified for cards using the 346-040-558-102 connector to ensure reliable contact without mechanical overstress?
The 346-040-558-102's cantilever contact springs are designed for typical edge-connector insertion forces between 3–6 pounds (13–27 N) total for all 40 positions combined, or approximately 0.08–0.15 pounds per position. This force range balances secure contact pressure (required for low contact resistance) against excessive deformation that accelerates spring fatigue. Engagement depth on the 346-040-558-102 typically runs 0.6–0.8 inches to fully seat the card and establish all 40 contacts. Over-insertion (exceeding design depth) can bend the contact cantilevers permanently, reducing spring return and contact pressure on subsequent removal cycles. Insufficient insertion leaves the card floating, causing intermittent connections. Mechanical guides, keying features, or polarization slots on the 346-040-558-102 help users identify correct insertion direction and depth. For field-replaceable cards, include tactile feedback (a distinct mechanical stop) on the 346-040-558-102 to signal full seating and reduce the risk of partial engagement.
Is the 346-040-558-102 suitable for high-speed digital signaling, and what transmission-line effects should be considered?
The 346-040-558-102 is fundamentally a low-to-medium frequency connector. Its 0.125" pitch and single-row cantilever contact geometry do not support controlled impedance design or differential pair routing without significant engineering effort. For signals exceeding approximately 10 MHz with rise times below 5 ns, the 346-040-558-102 introduces reflections, crosstalk, and group delay variations across the 40-position array due to uncontrolled impedance (typically 80–120 Ω in unshielded card-edge configurations). The 346-040-558-102 works well for digital I/O, parallel data busses, or analog signal distribution where impedance precision is not critical. High-speed applications should reserve dedicated power and ground positions on the 346-040-558-102 (using multiple ground connects) to establish a low-impedance return path. If the 346-040-558-102 must carry high-speed clock or serial data, route signals away from card-edge positions when possible, or add termination resistors and length-matched traces on the backplane to mitigate reflections.
What is the RoHS3 compliance status of the 346-040-558-102, and are there any restricted substance concerns for automotive or medical applications?
The 346-040-558-102 is marked as RoHS3 Compliant, meaning it conforms to EU Directive 2011/65/EU and its amendments (RoHS3), which restrict lead, cadmium, mercury, hexavalent chromium, and specified brominated flame retardants. The 346-040-558-102's gold finish, copper alloy contacts, and polyester insulation all meet these thresholds. REACH status is listed as Unaffected, indicating the 346-040-558-102 does not contain substances of very high concern (SVHC) above notification thresholds or requires additional documentation for EU market access. For automotive (AEC-Q standards) or medical device applications, verify that your end-market's supply chain accepts RoHS3 compliance; some aerospace or legacy military programs may require non-RoHS variants. The 346-040-558-102's EAR99 classification (Export Administration Regulations) indicates no export controls beyond standard commerce, simplifying international distribution.
How does the 346-040-558-102's green polyester housing affect visual inspection and troubleshooting in production test or field service environments?
The 346-040-558-102 uses green polyester for the insulation housing, a color choice that provides good visual contrast against most PCB substrates and test fixtures. The green color on the 346-040-558-102 aids rapid identification during assembly and allows clear sightlines for verifying full card insertion (checking alignment of the card edge with the connector flange). Under UV or halogen work lights, the green housing on the 346-040-558-102 is transparent enough to inspect internal contact wear or foreign material lodged in the contact cavity. However, green polyester can discolor slightly after extended thermal cycling or UV exposure in outdoor applications, potentially making older boards harder to visually inspect. For field service, the neutral green color of the 346-040-558-102 does not fade dramatically, but consider applying protective conformal coating if the connector will be exposed to sunlight or corrosive industrial environments.
What is the expected mechanical lifespan of the 346-040-558-102 in frequent insertion/removal cycles, and when should preventive replacement be considered?
The 346-040-558-102's cantilever contacts undergo elastic deformation with each insertion cycle, and fatigue life depends on card thickness consistency and insertion force uniformity. Published specifications for edge connectors typically guarantee 500–1000 insertion cycles before contact resistance degradation becomes significant (exceeding 100 mΩ per contact). The 346-040-558-102 will likely reach this threshold sooner if cards are repeatedly inserted at angles, if insertion force varies widely between positions, or if card thickness drifts outside the 0.054–0.070" specification. In laboratory-controlled conditions with standardized card geometry and insertion technique, the 346-040-558-102 can sustain 1000+ cycles with acceptable contact performance. In field service with manual card changes, expect 200–500 cycles before noticeable contact wear patterns emerge on the 346-040-558-102. Preventive replacement should be considered after 300–500 cycles if the application requires low contact resistance (below 50 mΩ) or if you observe any contact chatter during electrical testing of cards on the 346-040-558-102.
Does the 346-040-558-102 require any special handling or storage procedures to preserve contact cleanliness and mechanical integrity before field deployment?
The 346-040-558-102 should be stored in its original packaging (listed as Box) in a clean, dry environment between 15–25°C and 40–60% relative humidity to prevent moisture absorption into the polyester housing and oxidation of the gold-plated contacts. Extended storage above 50% humidity can cause polyester to absorb moisture, increasing dielectric loss and dimensional instability. The 346-040-558-102's contact cavities are open to the environment and can collect dust or flux residue during manufacturing or transport; visually inspect the connector before installation and use compressed air (below 40 psi) to remove loose particles. Do not insert or remove cards repeatedly during storage or initial testing without cause, as this accelerates contact wear on the 346-040-558-102. If the 346-040-558-102 has been stored for over 12 months or exposed to temperature swings, perform a contact resistance check on at least 10% of the connector positions before committing to production to verify no degradation has occurred.
Can the 346-040-558-102 be used in applications requiring high current distribution across multiple positions, and what are the thermal or current-rating limits?
The 346-040-558-102 datasheet does not specify maximum current per contact or total connector current capacity, which is typical for edge connectors designed for mixed signal and digital I/O rather than power distribution. Based on standard copper alloy contact cross-sections and 10.0µin gold plating, each contact on the 346-040-558-102 can safely carry approximately 2–4 A under typical PCB trace cooling conditions (20°C rise above ambient). At 3 A per contact and 100 mΩ contact resistance, each position on the 346-040-558-102 will dissipate roughly 0.9 W of heat. For applications requiring bulk power distribution, do not rely on a single position on the 346-040-558-102; instead, parallel multiple contacts (e.g., 4–6 positions) to carry 10–15 A total while keeping individual contact current below 3 A and junction temperature rise below 30°C. Thermal management of the 346-040-558-102 connector itself depends on PCB copper weight and airflow; passive convection cooling is often insufficient for high-current designs, so consider auxiliary heat sinking or active cooling for sustained power applications.

Parts with Similar Specifications

The three parts on the right have similar specifications to EDAC Inc. 346-040-558-102

Product Attribute 346-040-558-107 346-040-558-112 346-040-558-108 346-040-558-101
Part Number 346-040-558-107 346-040-558-112 346-040-558-108 346-040-558-101
Manufacturer EDAC Inc. EDAC Inc. EDAC Inc. EDAC Inc.
Base Product Number - DAC34H84 MAX500 ADS62P42
Contact Finish Thickness - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Flange Feature - - - -
Number of Positions/Bay/Row - - - -
Number of Rows - - - -
Gender - - - -
Pitch - - - -
Features - - - Simultaneous Sampling
Termination - - - -
Material - Insulation - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Contact Finish - - - -
Termination Rows - - - -
Number of Positions - - - -
Color - - - -
Contact Material - - - -
Card Thickness - - - -
Card Type - - - -
Read Out - - - -
Contact Type - - - -
Mounting Type - Surface Mount Through Hole Surface Mount

346-040-558-102 Datasheet PDF

Download 346-040-558-102 pdf datasheets and EDAC Inc. documentation for 346-040-558-102 - EDAC Inc..

Datasheets
346-040-558-102 Drawing.pdf 346,396 Series Ordering Guiide.pdf
Environmental Information
EDAC REACH.pdf

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346-040-558-102 Image

346-040-558-102

EDAC Inc.
98D-346-040-558-102

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