D-Sub, D-Shaped Connectors - Accessories

Image Part Number Description / PDF Quantity Rfq
1731121712

1731121712

Woodhead - Molex

FCT INSULATOR

0

1731120954

1731120954

Woodhead - Molex

FCT DUST CAP

0

1731121719

1731121719

Woodhead - Molex

FCT CONTACT WIRE WRAP RCPT

0

1731121713

1731121713

Woodhead - Molex

FCT WASHER

0

1731120657

1731120657

Woodhead - Molex

FCT LATCH LOCK M3

0

1731121328

1731121328

Woodhead - Molex

FCT ACCESSORY

0

1731120541

1731120541

Woodhead - Molex

SOCKET FRONT BODY PLATED

0

1731120707

1731120707

Woodhead - Molex

FCT DUST CAP S3 PLSTC RCPT LUG/W

0

1731120609

1731120609

Woodhead - Molex

FCT CAB-RED PLT PLSTC 9 FPHGR5

0

1731121375

1731121375

Woodhead - Molex

FCT ACCESSORY

0

1731120976

1731120976

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731120132

1731120132

Woodhead - Molex

FCT DUST CAP S5 SHLD PLSTC RCPT

0

1731120977

1731120977

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731120950

1731120950

Woodhead - Molex

FCT DUST CAP

0

1731120125

1731120125

Woodhead - Molex

FCT DUST CAP S3 SHLD PLSTC PLG W

0

1731121009

1731121009

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731121308

1731121308

Woodhead - Molex

FCT ACCESSORY

0

1731120129

1731120129

Woodhead - Molex

FCT DUST CAP S2 SHLD PLSTC RCPT

0

1731120556

1731120556

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731120631

1731120631

Woodhead - Molex

FCT DUST CAP S1 PLSTC PLG W/LUG

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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