D-Sub, D-Shaped Connectors - Accessories

Image Part Number Description / PDF Quantity Rfq
1731120378

1731120378

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731120458

1731120458

Woodhead - Molex

D-SUB SLIDE LOCKS

0

1731120946

1731120946

Woodhead - Molex

FCT DUST CAP

0

1731120260

1731120260

Woodhead - Molex

D-SUB SLIDE LOCKS

0

1731121300

1731121300

Woodhead - Molex

FCT ACCESSORY

0

0681540011

0681540011

Woodhead - Molex

OBD2 DUMMY PLUG ASSY

0

1731121091

1731121091

Woodhead - Molex

FCT CABLE CLAMP 16.0X3.2 SI 1GEW

0

1731120986

1731120986

Woodhead - Molex

FCT REDUCTION PLATE

0

1731120103

1731120103

Woodhead - Molex

FCT DUST CAP S1 PLSTC PLG W/CHAI

0

1731120108

1731120108

Woodhead - Molex

FCT DUST CAP S1 PLSTC RCPT W/CHA

0

1731120363

1731120363

Woodhead - Molex

D-SUB PLASTIC DUST CAPS

0

1731120557

1731120557

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731121071

1731121071

Woodhead - Molex

FCT TERM HFREQ STR PC RCPT 75 OH

0

1731120111

1731120111

Woodhead - Molex

FCT DUST CAP S4 PLSTC RCPT W/CHA

0

1731120578

1731120578

Woodhead - Molex

D-SUB PLASTIC DUST CAPS

0

1731120713

1731120713

Woodhead - Molex

FCT STRAIN RELIEF CLAMP S4

0

1731120665

1731120665

Woodhead - Molex

FCT RF CLAD FOAM GASKET S3

0

1731121025

1731121025

Woodhead - Molex

FCT BLIND HFREQ CRP RCPT 50 OHM

0

1731120434

1731120434

Woodhead - Molex

D-SUB PLASTIC DUST CAPS

0

1731120339

1731120339

Woodhead - Molex

FCT STRAIN RELIEF CLAMP

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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