D-Sub, D-Shaped Connectors - Accessories

Image Part Number Description / PDF Quantity Rfq
1731100103

1731100103

Woodhead - Molex

FCT DUST CAP S1 W/SCREWLCK

300

1727040086

1727040086

Woodhead - Molex

FCT DUST CAP S2 PLSTC RCPT

0

0685030103

0685030103

Woodhead - Molex

OBD PLUG CPA

275

1731120301

1731120301

Woodhead - Molex

FCT RUBBER BUSHING SIZE 1-2A

85

1731120069

1731120069

Woodhead - Molex

FCT RUBBER BUSHING SIZE 3-4

794

1731120062

1731120062

Woodhead - Molex

FCT DUST CAP S3 MTL PLG

0

1731120257

1731120257

Woodhead - Molex

FCT DUST CAP S1 PLSTC RCPT ANTI

200

1731090644

1731090644

Woodhead - Molex

FCT DSUB

0

1731120641

1731120641

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731120565

1731120565

Woodhead - Molex

FCT COVER PLATE S4

200

1201000004

1201000004

Woodhead - Molex

CONN D-SUB 9PIN ATTCH VERT/H

0

1731120365

1731120365

Woodhead - Molex

FCT LOCKPLATE S1-S4 HOOD SIDE

198

1731120640

1731120640

Woodhead - Molex

FCT CRIMPING FLANGE

0

1731121101

1731121101

Woodhead - Molex

D-SUB PLASTIC DUST CAPS

0

1731121135

1731121135

Woodhead - Molex

FCT DUST CAP

0

1731121099

1731121099

Woodhead - Molex

D-SUB PLASTIC DUST CAPS

0

1731120369

1731120369

Woodhead - Molex

FCT BRACKET MTL TIN PLATED

0

1731121338

1731121338

Woodhead - Molex

FCT ACCESSORY

0

1731120341

1731120341

Woodhead - Molex

FCT STRAIN RELIEF CLAMP

0

1731120334

1731120334

Woodhead - Molex

FCT CRIMPING FLANGE

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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