L77SDDG50SOL2RM5GC309 vs DAO3W3P500G40LF

Part Number
L77SDDG50SOL2RM5GC309
DAO3W3P500G40LF
Category D-Sub Connectors D-Sub Connectors
Manufacturer Amphenol ICC (Commercial Products) Amphenol ICC (FCI)
Description CONN D-SUB RCPT 50POS VERT SLDR CONN D-SUB PLUG 3POS R/A SOLDER
Package - -
Series SD DW
Features Board Lock Board Lock, Grounding Indents, Mounting Brackets
Mounting Type Through Hole Through Hole, Right Angle
Termination Solder Solder
Current Rating 5A 40A
Contact Finish Gold Gold
Number of Positions 50 3 (Power)
Connector Type Receptacle, Female Sockets Plug, Male Pins
Contact Finish Thickness 30µin (0.76µm) -
Number of Rows 3 1
Connector Style D-Sub D-Sub, Combo
Contact Type Signal Power
Flange Feature Board Side (M3) Board Side (4-40)
Shell Material, Finish Steel, Tin Plated Steel, Tin Plated
Material Flammability Rating UL94 V-0 UL94 V-0
Shell Size, Connector Layout 5 (DD, D) 2 (DA, A) - 3W3
  • 1. What is a D-SUB connector

    The name of the D-SUB connector comes from the D-shaped appearance of its plug. It is a double-row cable connector widely used in computer, industrial automation and communication fields. This connector consists of two parts: a plug and a socket. It is connected through pinholes and pins. It can transmit video, audio and digital signals and provide a large number of grounding points.
    The D-SUB connector is a compact and versatile connector mainly used to support power, analog, RF or digital signal transmission. It has a variety of models, options and accessories and is a very economical interconnection solution.

  • 2. Classification of D-SUB connectors

    ‌Solder cup D-Sub connector‌: This connector meets commercial industrial standards and can be paired with any docking solder cup D-Sub connector. The contacts are electroplated with flash gold, and the connector insulator meets the UL94V-0 standard. The maximum wire size is 20 AWG, and 9, 25, 37 and 50 pin specifications are available.

    ‌Crimp D-Sub connector‌: Crimp D-Sub connectors meet commercial industrial standards and can be used for most standard D-Sub male connectors. Compatible with 20-28 AWG wire range, available in 9, 15, 25 and 50 pin sizes.

    ‌Punch-type D-Sub connector‌: This connector is easily soldered into the through-hole of the printed circuit board or used in many other applications. Solder placement follows a standard footprint, and gold-plated contacts ensure long life. As an industrial standard commercial DB37 female PCB type connector, it has standard mounting holes for application flexibility.

  • 3. FAQ of D-SUB Connector

    ‌D-SUB connector connection is poor

    Performance: shell damage, bayonet connector loose or stuck after plugging.
    Cause: internal defects of the connector, external force damage.
    Solution: Check and repair internal defects of the connector and avoid external force damage.

    ‌D-SUB connector oxidation What are the manifestations?

    Performance: increased contact resistance.
    Cause: environmental factors and current effects.
    Solution: Clean and maintain the connector regularly, and use a protective cover to avoid pin exposure.

    ‌‌What problems are caused by deformation of D-SUB connector?

    Performance: Affects contact area and stability.

    Cause: Mechanical pressure or temperature change.

    Solution: Avoid excessive mechanical pressure and check connector status regularly.

  • 4. FAQ of D-SUB Connector

    ‌What is the reason for no signal in D-SUB connector?
    Performance: No signal.

    Solution: Check whether the signal cable is plugged in properly and ensure stable connection. 3.

    ‌‌D-SUB connector causes the monitor to fail to display.
    Performance: The monitor cannot display.
    Solution: Adjust the computer resolution to the highest resolution supported by the monitor.

    ‌‌What is the reason for poor connection of D-SUB connector?
    Performance: Poor connection.

    Cause: The pin is exposed and easily damaged.
    Solution: Use a protective cover to avoid pin exposure and operate carefully.

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