How to Choose D-sub Connectors？

D-sub Connector Selection Guide

Step 1: Determine the Number of Cores and Layout

How many signals are needed? Standard density: 9, 15, 25, 37, 50; High density: 15, 26, 44, 62, 78

If space is limited but the core count is high → Choose the high-density series

Step 2: Select installation and termination type

Cable termination: Solder cup, Crimp, IDC piercing, PCB soldering

Equipment termination: Right angle or vertical pins

Panel mounting: Front/rear mounting, flange size (standard/compact)

Step 3: Consider environmental protection level

Ordinary indoor dry environment → Plastic shell or standard metal shell

Damp, dusty, outdoor → Waterproof series (IP67/IP68), with sealing ring and locking screws

Strong electromagnetic interference → Full metal shielded shell + grounding spring

Step 4: Is a special combination (mixed installation) required?

Simultaneous signal + power (e.g., 5A/10A/20A) Power pins)

Simultaneous signal + coaxial (for video or high frequency)

Simultaneous signal + pneumatic/fiber optic → Custom mixed module

Step 5: Confirm terminal and process requirements

High mating life (>1000 cycles) → Turned contact

High-volume, cost-sensitive → Stamped contact

Special plating: Gold plating (signal/low contact resistance), Tin plating (soldering), Silver plating (high current)

Step 6: Accessories and secondary processing

Is injection molding of cable assemblies required? Is overmolding required?

Are locking screws (4-40, M2.5, M3) required? Are dust covers required?