L77TWA7W2SMP2SV4R vs L77TWA3W3SEP3V4F
| Part Number |
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| Category | D-Sub Connectors | D-Sub Connectors |
| Manufacturer | Amphenol ICC (Commercial Products) | Amphenol ICC (Commercial Products) |
| Description | CONN D-SUB RCPT 7POS R/A SOLDER | CONN D-SUB RCPT 3POS R/A SOLDER |
| Package | - | - |
| Series | TW | TW |
| Mounting Type | Panel Mount, Through Hole, Right Angle | Panel Mount, Through Hole, Right Angle |
| Termination | Solder | Solder |
| Current Rating | 7.5A | - |
| Contact Finish | Gold | Gold |
| Number of Positions | 7 (5 + 2 Power) | 3 (Power) |
| Connector Type | Receptacle, Female Sockets | Receptacle, Female Sockets |
| Contact Finish Thickness | 16µin (0.40µm) | 16µin (0.40µm) |
| Number of Rows | 2 | 1 |
| Connector Style | D-Sub, Combo | D-Sub, Combo |
| Contact Type | Signal and Power | Power |
| Flange Feature | Board Side (4-40) | Mating Side, Female Screwlock (4-40) |
| Shell Material, Finish | Steel, Tin Plated | Steel, Tin Plated |
| Shell Size, Connector Layout | 2 (DA, A) - 7W2 | 2 (DA, A) - 3W3 |
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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. Specifications and models of D-SUB connectors
There are many specifications and models of D-SUB connectors, and the common ones are D-SUB 9-pin, D-SUB 15-pin, D-SUB 25-pin and other series. These series have their own scope of application and characteristics. Users can choose the appropriate specifications and models according to actual needs. At the same time, the prices of different specifications and models are also different. Users need to consider factors such as cost and applicability when choosing.
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3. Problems caused by poor contact of D-SUB connectors
Performance: increased contact resistance, circuit breakage, contact curtain movement, etc.
Causes: inadequate connection, insufficient contact area, dirt, corrosion, oxidation, etc.
Solution: Re-plug the connector, clean the connection part (use alcohol or other cleaning agents), replace the contact or connector. -
4. 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.
