D-SUB connector: designation, description, classification of the device

The D-SUB connector is known to virtually every user of a personal computer. It is designed to connect a PC or laptop to monitors, TVs, etc. The D-SUB connector (the second name is VGA) was present on all video cards of computers, but recently it was replaced by a new standard - the DVI interface. Nevertheless, this type is still common in the stuffing of "old iron".

Interface Description

The D-SUB connector contains a pad with pins in two, three or four rows. The number of pins in the first row is one more than in the second. Contacts are protected by a special metal casing, the profile of which resembles the shape of letter D. Due to this, the possibility of incorrect connection of the connector is excluded.

The connectors of this series (both socket and plug) can have a different number of contacts:

1. The number of pins in the standard density connectors varies from 9 to 50 units.
2. High density products contain 15 to 78 contacts.
3. Hybrid devices (enlarged pins) can consist of 3-43 pins.

As a rule, the D-SUB connectors (for a reliable connection) are subjected to additional processing. Thus, the contacts of this device can be covered with gilding or tin (tinning). This interface is installed on a block, card or cable. In the latter case, different types of housings are used. Such connectors are widely used for data transmission in many interfaces, as well as for supplying power to a variety of devices.

D-SUB connector: classification

1. DB - for soldering. The connector is mounted on the cable by soldering. They are of increased and ordinary density.
2. DC - crimping. The contacts are pre-crimped on the cable, and then inserted into the shoe shell with a special tool.
3. DI - tattoos for a train. The connector is punctured with a pitch of 1.27 mm per loop. The density of the device is increased and normal.
4. DBI - for fast mounting. The cores of the cable are laid out on the connectors of the connector, which has the shape of a dovetail, and clamped with a special insert (included in the connector). To mount such a product, a specialized tool is used.
5. DBC - hybrid (increased contacts). In a single body there are signal (from 4 to 1) and power (from 1 to 8) terminals. Such a connector allows to save space in the device, when it is necessary to use different types of signals. These connectors are mounted on the board by soldering. The D-SUB (VGA) connector may have a different layout on the circuit. In this connection, the following types of device are distinguished:

• DRB - horizontal (right angle). There are three modifications: A = 7.2 mm, B = 9.4 mm, C = 13.8 mm. These values correspond to the distance from the edge of the connector to the first row of contacts.
• DBB - vertical. On the inside of the connector are cylindrical pins that are soldered into the board.
• DRN - coupled (combined). They represent a single unit, which consists of 2 or 3 D-SUB connectors with a different number of pins. The compact size of the connector saves space on the PCBs.

Connectors D-SUB MIL-C

This type of connector is designed for use in military equipment. Such connectors are considered power, they can be mounted on cables of various sizes. There are modifications with replaceable crimp terminals. The connectors of this series are characterized by more stringent requirements for technical characteristics. They have a very strong housing, resistant to environmental influences. These devices meet high reliability requirements, but their use is very limited due to the high cost.