DB9 D-Sub Connectors: China Sourcing Reference
1 resources tagged with "Db9"
DB9 is the 9-pin D-Sub connector that still anchors RS-232 serial, CAN, and a lot of industrial equipment, making it a high-volume staple from China connector factories. The two quality variables that matter most are contact plating (gold-flash versus a real micro-inch gold spec) and shell construction, since DB9 ports on field equipment endure repeated mating. EMC backshell options and proper shield termination separate an industrial-grade part from a commodity one.
When you source DB9, lock down male vs female, contact type (machined contacts last longer than stamped), termination style (solder cup, IDC, right-angle PCB), and plating thickness. The common pitfall is a low bid hiding thin plating that corrodes or wears through after limited insertions, which surfaces only as intermittent serial faults in the field.
Wiki (1)
FAQ
Is DB9 the same as DE-9?
Technically the 9-pin connector is DE-9 (E denotes the shell size), but the industry universally calls it DB9. Chinese suppliers list it as DB9, so order under that name and verify the shell size in the datasheet.
What plating should I specify for an industrial DB9?
Ask for a stated gold thickness on the contacts rather than 'gold flash,' which can be a fraction of a micro-inch. For frequent mating in the field, a defined gold spec plus machined contacts prevents intermittent connections.
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