D-Sub, D-Shaped Connectors - Accessories

Image Part Number Description / PDF Quantity Rfq
1731121723

1731121723

Woodhead - Molex

FCT PACKAGING

0

1731100417

1731100417

Woodhead - Molex

FCT DSUB WD

0

0716283000

0716283000

Woodhead - Molex

GUIDE PIN LFH MATRIX 50/75

0

0716294000

0716294000

Woodhead - Molex

MTX50&75 DKG HDW GUIDE SLEEVE

0

1731121140

1731121140

Woodhead - Molex

FCT DUST CAP

0

1731121339

1731121339

Woodhead - Molex

FCT STANDOFF NUT 4-40UNC 6.3 ZIN

0

1731120962

1731120962

Woodhead - Molex

FCT DUST CAP

0

1731121060

1731121060

Woodhead - Molex

FCT CRIP COVER PFHGR 3-4

0

1731121076

1731121076

Woodhead - Molex

FCT NUT 4-40 SW4.5/1.5 ZINC

0

1731121139

1731121139

Woodhead - Molex

FCT DUST CAP

0

1731120974

1731120974

Woodhead - Molex

FCT BRACKET SET

0

1731120972

1731120972

Woodhead - Molex

FCT BRACKET SET

0

1731121342

1731121342

Woodhead - Molex

FCT ACCESSORY

0

1731120975

1731120975

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731121376

1731121376

Woodhead - Molex

FCT ACCESSORY

0

1731120131

1731120131

Woodhead - Molex

FCT DUST CAP S4 SHLD PLSTC RCPT

0

1731120127

1731120127

Woodhead - Molex

FCT DUST CAP S5 SHLD PLSTC PLG W

0

1731121373

1731121373

Woodhead - Molex

FCT ACCESSORY

0

1731120632

1731120632

Woodhead - Molex

FCT DUST CAP S3 PLSTC RCPT W/LUG

0

1731121313

1731121313

Woodhead - Molex

FCT THREADED INSERT M2.5

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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