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In2Connect offer a wide range of machined pin 'D' subminiature connectors: lugs, sockets, hoods and accessories from 9 to 50 way. Flame retardant glass filled polyester insulators and gold over nickel plated machined contacts are housed in trivalent chromated zinc or tin plated steel shells. Plugs can have dimpled shells to ensure good conductivity for EMI/RFI shielding.
Because of their machined, circular cross-section, turned contacts have a lower electrical transfer resistance than their stamped and formed counterparts. Male and female connectors fit more precisely together and give a more reliable, gas-tight connection with more tolerance to vibration.
The part-numbering system uses on most d-sub connectors is based on the American topology using "D" as the prefix for the whole series, followed by a letter denoting the shell size (A=15 pin, B=25 pin, C=37 pin, D=50 pin, E=9 pin), followed by the actual number of pins, followed by the gender (P=plug, S=socket). For example, DB25S denotes a D-sub with a 25 position shell size and a 25 position female contact configuration. Many specifiers call all D-sub connectors "DB" connectors instead of specifying "DA," "DC" or "DE." When the PC serial port began to use 9-pin connectors, they were often called "DB9" instead of DE9. It is now common to see DE9 connectors sold as "DB9" connectors. DB-9 is nearly always intended to be a 9 pin connector with an E size shell.
There are two differing PC Board "footprints", the American MIL-C, where the contacts are spaced approximately 0.108 inches (2.74 mm) apart with the rows spaced 0.112 inches (2.84 mm) apart and the UK/European which is generally 2.54mm (0.100") between both contacts and rows. This is a very important consideration to PCB design engineers and is easily picked up from the PDF files we publish from ITW McMurdo, Conec, etc. Irrespective of PCB footprint the mating faces of d-sub connectors are fully interchangeable with MIL-C-24308 types from all other manufacturers.
Historically the widest application of D-subs has been in RS 232 serial communications. RS-232 devices originally used the DB25 25-pin D-sub, but for many applications the less common signals were omitted, allowing a DE9 D-sub to be used. Female connectors are normally fitted to the device and male connectors at the cable , but PCs often tend to have male connectors at the device, while modems may have female connectors.
In2Connect stock product from ITW McMurdo, Conec and others. A choice of many termination styles including crimp are available making this range one of the most versatile:
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