D-Sub, D-Shaped Connectors - Accessories

Image Part Number Description / PDF Quantity Rfq
1731120109

1731120109

Woodhead - Molex

FCT DUST CAP S2 PLSTC RCPT W/CHA

0

1731120706

1731120706

Woodhead - Molex

FCT DUST CAP S2 PLSTC PLG ANTI/H

0

1731120429

1731120429

Woodhead - Molex

FCT FRONT SEAL S3

0

1731120450

1731120450

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731120703

1731120703

Woodhead - Molex

FCT FRONT SEAL S3 PLG/ML

0

1731120965

1731120965

Woodhead - Molex

FCT FRONT SEAL

0

1731120984

1731120984

Woodhead - Molex

FCT SLIDE LOCK S4 HOOD

0

1731121327

1731121327

Woodhead - Molex

FCT ACCESSORY

0

1731120435

1731120435

Woodhead - Molex

FCT DUST CAP S2 PLSTC RCPT ANTI

398

1731120115

1731120115

Woodhead - Molex

FCT DUST CAP S3 SHLD PLSTC PLG

0

1731121357

1731121357

Woodhead - Molex

FCT ACCESSORY

0

1731120361

1731120361

Woodhead - Molex

D-SUB PLASTIC DUST CAPS

0

1731121714

1731121714

Woodhead - Molex

FCT CONNECTOR HOUSING

0

1731121119

1731121119

Woodhead - Molex

FCT GUIDE PIN

0

1731121149

1731121149

Woodhead - Molex

FCT CRIMPING FLANGE 100PCS

0

1731121117

1731121117

Woodhead - Molex

FCT CABLE CLAMP

0

1731121370

1731121370

Woodhead - Molex

FCT ACCESSORY

0

1731121122

1731121122

Woodhead - Molex

FCT STRAIN RELIEF CLAMP

0

1731121329

1731121329

Woodhead - Molex

FCT ACCESSORY

0

1731120580

1731120580

Woodhead - Molex

D-SUB PLASTIC DUST CAPS

0

D-Sub, D-Shaped Connectors - Accessories

1. Overview

D-Subminiature (D-Sub) connectors are a family of electrical connectors characterized by a D-shaped metal shielding shell and multiple parallel contacts. They provide reliable signal and power transmission in demanding environments. These connectors remain critical in industrial automation, telecommunications, and legacy computer systems despite emerging alternatives. Their mechanical robustness and customizable configurations ensure continued relevance in specialized applications.

2. Main Types and Functional Classification

TypeKey FeaturesApplication Examples
DB-9 (DE-9)9 contacts, compact sizeRS-232 serial communication, PC COM ports
DB-15 (HD-15)15 contacts, high-densityVGA video interfaces, industrial sensors
DB-2525 contacts, parallel signalingOlder printer ports, industrial control systems
DB-3737 contacts, rugged designIndustrial instrumentation, military equipment

3. Structure and Components

Standard D-Sub connectors consist of: - Metal shell: Zinc or aluminum alloy housing with EMI shielding - Insulator: High-temperature thermoplastic (e.g., LCP, PBT) - Contacts: Phosphor bronze or beryllium copper with gold/tin plating - Mounting hardware: Threaded nuts or panel-mount flanges Variants include solder cup, PCB mount, and crimp termination options with optional environmental seals.

4. Key Technical Specifications

ParameterTypical RangeSignificance
Current Rating1-10A per contactDetermines power transmission capability
Voltage Rating50-600VEnsures dielectric insulation safety
Contact Resistance5-20m Impacts signal integrity
Insulation Resistance1000M minPrevents leakage currents
Operating Temp-55 C to +125 CDefines environmental tolerance

5. Application Fields

  • Computer Systems: Legacy serial/parallel ports, KVM switches
  • Industrial Automation: PLC interfaces, sensor/actuator connections
  • Telecommunications: Router/console ports, test equipment
  • Medical Devices: Diagnostic equipment data interfaces
  • Aerospace: Avionics control systems, ground support equipment

6. Leading Manufacturers and Products

ManufacturerKey ProductsSpecialization
TE ConnectivityDEUTSCH D-Sub seriesMilitary/aerospace grade connectors
Amphenol97-Series D-SubsHigh-density industrial connectors
MolexDuraCon D-SubCommercial/industrial applications
ITT CannonDelta-D-SubHarsh environment solutions

7. Selection Guidelines

Key selection factors: - Signal/power requirements (contact count, current/voltage needs) - Environmental conditions (temperature, vibration, moisture) - Mechanical constraints (panel space, mating cycles) - Shielding requirements (EMI/RFI protection level) - Termination method (solder, crimp, PCB mount) - Compliance standards (MIL-STD, RoHS, REACH) Example: Selecting DB-9 with gold contacts and IP67 rating for outdoor industrial control cabinets.

8. Industry Trends

Emerging trends include: - Miniaturization (e.g., micro D-Sub at 2.5mm pitch) - High-speed variants supporting USB 3.0+ signaling - Integration with fiber optic/hybrid contact designs - Adoption of lead-free plating processes - Modular designs enabling hot-swap functionality - Increased use in IoT edge devices for legacy system compatibility

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