D-Sub, D-Shaped Connectors

D-Sub, D-Shaped Connectors - Accessories

Part Number	Description / PDF	Quantity
1731120564 Woodhead - Molex	FCT DUST CAP S1 PLSTC PLG ANTI/H	200
747746-1 TE Connectivity AMP Connectors	CONN GROMMET DB9/15 BLACK	1839
1-750877-7 TE Connectivity AMP Connectors	CONN TERM COVER 68POS .050	0
61030000070 HARTING	CRIMP FLNG - HOOD 9-37P 75-85MM	0
SF6715 NorComp	CONN D-SUB 15POS HD SEALING FLNG	0
552655-1 TE Connectivity AMP Connectors	LATCH	1037
5206942-1 TE Connectivity AMP Connectors	CONN D-SUB LATCH SLIDE CLIP	895
2-747580-2 TE Connectivity AMP Connectors	CONN FERRULE STRAIGHT DB37	1651
09664080001 HARTING	DSUB IDC 37POLE PLAST CBL CLAMP	59
1-2308272-1 TE Connectivity AMP Connectors	CABLE CLAMPS (CASE RAW)	0
1727040092 Woodhead - Molex	FCT DUST CAP S5 PLSTC RCPT	200
QLOCKPOST-1 NorComp	QUICK LOCK .118" MAX M3 KIT	0
09670029062 HARTING	D SUB IP 67 SHIELDED CAP_FE_25P	0
2-2308349-0 TE Connectivity AMP Connectors	CRIMP FLANGE 10 SMALL	88
025-9528-000 VEAM	DUST CAP FOR MDM-21P ANTISTATIC	0
09670029004 HARTING	D SUB IP 67_37 POLE FRONT SEAL	22
4-745130-4 TE Connectivity AMP Connectors	SHLDING FERRULE,PLTD,BULK PKG	0
3448-8D37A 3M	STRAIN RELIEF 37 POS	602
2-2308350-1 TE Connectivity AMP Connectors	CRIMP BARREL11	134
SF6725 NorComp	CONN D-SUB 25POS HD SEALING FLNG	170

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

Type	Key Features	Application Examples
DB-9 (DE-9)	9 contacts, compact size	RS-232 serial communication, PC COM ports
DB-15 (HD-15)	15 contacts, high-density	VGA video interfaces, industrial sensors
DB-25	25 contacts, parallel signaling	Older printer ports, industrial control systems
DB-37	37 contacts, rugged design	Industrial 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

Parameter	Typical Range	Significance
Current Rating	1-10A per contact	Determines power transmission capability
Voltage Rating	50-600V	Ensures dielectric insulation safety
Contact Resistance	5-20m	Impacts signal integrity
Insulation Resistance	1000M min	Prevents leakage currents
Operating Temp	-55 C to +125 C	Defines 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

Manufacturer	Key Products	Specialization
TE Connectivity	DEUTSCH D-Sub series	Military/aerospace grade connectors
Amphenol	97-Series D-Subs	High-density industrial connectors
Molex	DuraCon D-Sub	Commercial/industrial applications
ITT Cannon	Delta-D-Sub	Harsh 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