684M21W1103L461 vs DAO7W2S300G40LF
| Part Number |
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| Category | D-Sub Connectors | D-Sub Connectors |
| Manufacturer | NorComp Inc. | Amphenol ICC (FCI) |
| Description | CONN D-SUB PLUG 21POS R/A SOLDER | CONN D-SUB RCPT 7POS VERT SOLDER |
| Package | - | - |
| Series | 684M | DW |
| Features | Board Lock, Grounding Indents, Mounting Brackets | Board Lock |
| Mounting Type | Board Edge, Through Hole, Right Angle | Through Hole |
| Termination | Solder | Solder |
| Current Rating | 5A, 40A | 7.5A, 40A |
| Contact Finish | Gold | Gold |
| Number of Positions | 21 (20 + 1 Power) | 7 (5 + 2 Power) |
| Connector Type | Plug, Male Pins | Receptacle, Female Sockets |
| Contact Finish Thickness | Flash | - |
| Number of Rows | 2 | 2 |
| Connector Style | D-Sub, Combo | D-Sub, Combo |
| Contact Type | Signal and Power | Signal and Power |
| Flange Feature | Housing/Shell (4-40) | Board Side (4-40) |
| Shell Material, Finish | Steel, Nickel Plated | Steel, Tin Plated |
| Material Flammability Rating | UL94 V-0 | UL94 V-0 |
| Shell Size, Connector Layout | 3 (DB, B) - 21W1 | 2 (DA, A) - 7W2 |
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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. 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. Applications of D-SUB full range of connectors
1. Computer field: D-SUB connectors are widely used in the computer field, such as the connection of external devices such as monitors, keyboards, mice, etc.
2. Communication field: D-SUB connectors can be used for signal transmission between various communication devices, such as telephones, fax machines, routers, etc.
3. Industrial control field: D-SUB connectors are widely used in the industrial control field, such as the connection of PLCs, sensors, actuators and other equipment.
4. Automation field: D-SUB connectors can be used for signal transmission and power supply in automation equipment, such as robots, automated assembly lines, etc.
5. Other fields: In addition to the above fields, D-SUB connectors can also be used in other fields such as security, lighting, and medical equipment. -
4. D-SUB connector insulation is poor
Performance: short circuit, insulation resistance is too poor.
Cause: high humidity in the use environment, serious pollution, water or other liquids penetrate into the insulator, etc.
Solution: Improve the use environment, clean the inside of the insulator, and replace the insulator.
