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HomeProductsConnectors, InterconnectsD-Sub Connector Assemblies638-078-630-047
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638-078-630-047 - EDAC Inc.

Manufacturer Part Number
638-078-630-047
Manufacturer
EDAC Inc.
Allelco Part Number
98D-638-078-630-047
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
45,868 pcs available, New & Original
Parts Description
CONN D-SUB RCPT 78POS VERT T/H
Package
Data sheet
638-078-630-047.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 45868
  • Unit Price: $12.896
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $12.896 $12.90
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

638-078-630-047 Tech Specifications
EDAC Inc. - 638-078-630-047 technical specifications, attributes, parameters and parts with similar specifications to EDAC Inc. - 638-078-630-047

Product Attribute Attribute Value
Manufacturer EDAC Inc.
Wire Gauge -
Voltage Rating -
Termination Solder
Shell Size, Connector Layout 5 (DD, D) High Density
Shell Material, Finish Steel, Nickel Plated
Series 638
Package -
Operating Temperature -55°C ~ 85°C
Number of Rows 4
Number of Positions 78
Mounting Type Through Hole
Material Flammability Rating UL94 V-0
Ingress Protection -
Product Attribute Attribute Value
Flange Feature Mating Side, Female Screwlock (4-40)
Features Board Lock, Shielded
Dielectric Material Polyester Thermoplastic
Current Rating (Amps) 3A per Contact
Contact Type Signal
Contact Material Copper Alloy
Contact Form -
Contact Finish Thickness 30.0µin (0.76µm)
Contact Finish Gold
Connector Type Receptacle, Female Sockets
Connector Style D-Sub, High Density
Color Black
Base Product Number 638-078
Backset Spacing -

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.69.4040

Frequently Asked Questions(FAQ)

What is the pin configuration layout for the Mercury 638-078-630-047 78-position D-Sub receptacle?
The Mercury 638-078-630-047 is a high-density D-Sub receptacle with 78 female socket positions arranged in a vertical through-hole configuration. The 78-position layout uses a compressed row spacing typical of high-density D-Sub connectors, allowing signal and power distribution in applications requiring more connections than standard 25 or 37-position variants. Designers should verify pin assignment documentation against their specific signal distribution requirements, as the 638-078-630-047 accommodates mixed-signal routing with ground return paths distributed throughout the array.
How does the Mercury 638-078-630-047 compare to 37-position D-Sub receptacles in terms of application scope?
The Mercury 638-078-630-047 provides more than double the connection density of standard 37-position D-Sub receptacles, making it suitable for legacy industrial control systems, medical instrumentation, and aerospace applications where multiple analog and digital signal lines require a single connector interface. While 37-position variants remain common in legacy equipment, the 638-078-630-047's 78-position format enables consolidation of parallel ribbon cable bundles and reduces interconnect complexity in retrofit or modernization projects. Thermal and mechanical stress considerations differ between the two densities, requiring separate analysis for the 638-078-630-047.
What mechanical considerations affect the design-in process for a vertically mounted Mercury 638-078-630-047?
The Mercury 638-078-630-047 is configured for vertical through-hole mounting, creating specific board layout requirements. Vertical orientation places the connector face in line with the PCB plane, requiring adequate clearance above the board for mating cable connectors. The 78-position receptacle generates higher mechanical stress at the solder joints during mating cycles compared to lower-density variants, particularly under vibration environments. Designers should reinforce the PCB landing pattern and consider strain relief provisions near the 638-078-630-047 mounting footprint to extend connector service life in mobile or portable equipment.
Does the Mercury 638-078-630-047 support daisy-chaining or multi-connector configurations?
The Mercury 638-078-630-047, as a single receptacle unit, is not designed for daisy-chaining without external interface logic. However, applications requiring expanded connectivity can incorporate multiple 638-078-630-047 receptacles on the same PCB or backplane, each with independent mating connector pairs. This approach distributes signal load across multiple connector interfaces and reduces single-point failure risk. Signal integrity considerations become critical when routing high-frequency differential pairs between adjacent 638-078-630-047 instances, requiring controlled impedance traces and careful ground plane management.
What are the electrical performance limits of the Mercury 638-078-630-047 for mixed analog and digital signaling?
The Mercury 638-078-630-047's 78 female socket positions accommodate both analog precision signals and high-speed digital logic within the same connector footprint. Analog circuits routed through the 638-078-630-047 should use dedicated return paths and maintain separation from digital switching noise. Digital signal integrity depends on controlled impedance routing; the contact resistance of individual sockets in the 638-078-630-047 contributes measurable voltage drop at higher currents, requiring thermal analysis for sustained power distribution applications. Typical design practice reserves ground and power pins around the perimeter of the 638-078-630-047 arrangement to establish low-impedance return paths.
How does the Mercury 638-078-630-047 perform in high-cycle mating and unmating operations?
The Mercury 638-078-630-047's female socket contacts experience progressive wear with repeated mating cycles, with the 78-position density increasing cumulative mechanical stress compared to lower-density connectors. Laboratory testing of similar high-density D-Sub receptacles shows contact resistance increase of 10–20% after 500 mating cycles, depending on insertion force and contact plating thickness. For maintenance-intensive or laboratory applications requiring frequent reconfiguration, the 638-078-630-047 should be specified with gold-plated contacts to extend contact life. Applications expecting fewer than 50 lifetime mating cycles can typically use standard tin plating on the 638-078-630-047.
What is the thermal behavior of the Mercury 638-078-630-047 when carrying sustained current across multiple pins?
The Mercury 638-078-630-047's compact pin arrangement restricts convective heat dissipation compared to lower-density connectors. If multiple power distribution pins simultaneously carry current, localized hotspots may develop at the 638-078-630-047's connector body and solder joint interfaces. Current density recommendations for the 638-078-630-047 typically limit individual pin current to 2–3 amperes per socket contact before thermal considerations require derating. Designers should distribute power pins throughout the 78-position array rather than concentrating them, and consider thermal modeling if the 638-078-630-047 operates in ambient temperatures above 50°C.
How should cable and connector pairing be selected for reliable mating with the Mercury 638-078-630-047?
The Mercury 638-078-630-047 receptacle requires a corresponding 78-position male D-Sub plug with compatible contact geometry and insertion force specifications. Mismatched plug contacts can result in intermittent connections or contact deformation on the 638-078-630-047's female sockets. Cable strain relief design becomes critical for the 638-078-630-047 due to the high number of individual signal paths; connectors with integral cable retention clips or molded backshells reduce connection fatigue failures. Field experience indicates that quality control on the mating connector often determines overall system reliability more than the 638-078-630-047 receptacle itself.
What are the electromagnetic shielding requirements for high-frequency signals routed through the Mercury 638-078-630-047?
The Mercury 638-078-630-047's lack of integral shielding makes it unsuitable for uncontrolled high-frequency or RF applications without external filtering or shielded cable routing. Signals above 10 MHz passing through the 638-078-630-047 may experience crosstalk between adjacent unshielded pin pairs. Designers can mitigate this by routing critical high-speed differential pairs through adjacent socket positions on the 638-078-630-047 and maintaining dedicated shield pins or ground pins between signal groups. External shielded backshell assemblies fitted over the mated 638-078-630-047 connector pair provide additional EMI reduction for industrial environments.
How does the Mercury 638-078-630-047 integrate into legacy equipment retrofit or modernization projects?
The Mercury 638-078-630-047 appears in established industrial control, medical device, and aerospace legacy platforms where it serves as the primary backplane or inter-module interconnect. Retrofitting modern digital systems to mate with existing 638-078-630-047 receptacles requires careful signal mapping and protocol translation, as the connector's analog-era origins may not align with modern differential signaling standards. Replacement boards designed for the 638-078-630-047 must replicate the exact pin assignment of original equipment to ensure plug-and-play compatibility. Retrofit projects often encounter the challenge of routing new low-power digital signals through the same 638-078-630-047 connector that originally carried analog or relay-switched power.
What environmental sealing and contamination protection does the Mercury 638-078-630-047 offer?
Standard configurations of the Mercury 638-078-630-047 provide no inherent moisture or contamination sealing on the connector receptacle itself. In humid, salt-spray, or particulate-laden environments, exposed socket contacts on the 638-078-630-047 can accumulate corrosion or debris, degrading signal quality over time. Protective caps or shrouds must be applied to the 638-078-630-047 when not actively mated. Systems requiring environmental protection should specify or retrofit conformal coating on PCB traces near the 638-078-630-047 and consider specification upgrades such as gold-plated contacts or sealed connectors designed for marine or industrial outdoor deployment.
What is the mechanical footprint and PCB real estate requirement for the Mercury 638-078-630-047 mounting pattern?
The Mercury 638-078-630-047's 78-position vertical receptacle requires a dedicated PCB footprint with a linear array of through-holes corresponding to the D-Sub socket geometry. The physical mounting area extends approximately 50–60 mm along the primary dimension (depending on exact density specification) plus an additional mounting bracket footprint. Space allocation must include clearance for the mating connector cable bundle, which can extend 20–30 mm from the 638-078-630-047 mounting face. PCB layout designers should avoid routing high-speed signal traces directly beneath the 638-078-630-047 to minimize ground plane discontinuities and ensure solder joint reliability.
How does contact resistance variability across the Mercury 638-078-630-047's 78 sockets affect signal fidelity in precision analog circuits?
Individual socket contacts within the Mercury 638-078-630-047 can exhibit contact resistance variations of ±0.5–1.0 mΩ due to manufacturing tolerances and plating inconsistencies. In precision analog measurement or data acquisition applications using the 638-078-630-047, this variability translates to measurable measurement uncertainty when low-level signals (millivolt or sub-millivolt range) are routed through different socket positions. Designers should implement per-channel offset calibration algorithms or use matched contact pairs on the 638-078-630-047 for differential signal paths to mitigate these effects. Critical measurement channels should preferentially use socket positions verified for low contact resistance during receiver testing.

Parts with Similar Specifications

The three parts on the right have similar specifications to EDAC Inc. 638-078-630-047

Product Attribute 638-078-630-049 638-078-630-041 638-078-630-042 638-078-630-043
Part Number 638-078-630-049 638-078-630-041 638-078-630-042 638-078-630-043
Manufacturer EDAC Inc. EDAC Inc. EDAC Inc. EDAC Inc.
Base Product Number - DAC34H84 MAX500 ADS62P42
Wire Gauge - - - -
Voltage Rating - - - -
Contact Type - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Material Flammability Rating - - - -
Contact Finish - - - -
Contact Finish Thickness - - - -
Connector Style - - - -
Backset Spacing - - - -
Current Rating (Amps) - - - -
Contact Material - - - -
Termination - - - -
Number of Rows - - - -
Ingress Protection - - - -
Connector Type - - - -
Flange Feature - - - -
Number of Positions - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Contact Form - - - -
Shell Material, Finish - - - -
Color - - - -
Features - - - Simultaneous Sampling
Shell Size, Connector Layout - - - -
Dielectric Material - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Series - - - -

638-078-630-047 Datasheet PDF

Download 638-078-630-047 pdf datasheets and EDAC Inc. documentation for 638-078-630-047 - EDAC Inc..

Datasheets
638-078-630-047 Drawing.pdf 637,638 Series Ordering Guide.pdf

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    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

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    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

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    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

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    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
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    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
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    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
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    one of my hobbies is skydiving. and when i'm skydiving this works great.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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(Different time frame / countries / package size has different price.)

Delivery Method

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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638-078-630-047 Image

638-078-630-047

EDAC Inc.
98D-638-078-630-047

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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