D-Sub, D-Shaped Connectors

D-Sub, D-Shaped Connectors - Contacts

Part Number	Description / PDF	Quantity
1731120152 Woodhead - Molex	CONN DSUB SCKT 12-16AWG SLDR CUP	0
1731120829 Woodhead - Molex	COAX PCB STAIGHT CONTACT 50 OHM	0
1731140298 Woodhead - Molex	FCT TERM HFREQ SDR RCPT 50 OHM N	0
1731120838 Woodhead - Molex	FCT TERM HPWR	0
1731120673 Woodhead - Molex	FCT TERM HPWR	0
1731140196 Woodhead - Molex	FCT TERM HPWR SDR PLG 20 AMP 12-	0
1731120400 Woodhead - Molex	FCT THMB SCREW M3 70.5	320
1731120731 Woodhead - Molex	RCPT FCT CRP 20-24AWG 8U	0
1731120768 Woodhead - Molex	FCT TERM HFREQ	0
1731120720 Woodhead - Molex	PLUG FCT CRP 20-24AWG 50U	0
1731121105 Woodhead - Molex	FCT TERM SIGN STAMPED PLG CRP 26	0
1731120357 Woodhead - Molex	FCT TOOL CRIMPING DIE	0
1731120736 Woodhead - Molex	'FCT SIGN RCPT CRP 26-28AWG 30U'	0
1731120207 Woodhead - Molex	CONN D-SUB PIN 26-28AWG CRIMP	0
1731140199 Woodhead - Molex	FCT TERM HFREQ CRP RCPT 50 OHM N	0
1731120409 Woodhead - Molex	CONN D-SUB PIN 20-24AWG CRIMP	0
1731120020 Woodhead - Molex	CONN D-SUB PIN 20-24AWG CRIMP	10000
1731120887 Woodhead - Molex	FCT TERM HPWR	0
1731120795 Woodhead - Molex	FCT TERM HFREQ	0
1731121199 Woodhead - Molex	FCT TERM HPRC	0

D-Sub, D-Shaped Connectors - Contacts

1. Overview

D-Subminiature connectors, commonly referred to as D-Sub or D-Shaped connectors, are electrical connectors featuring a D-shaped metal shield. They are widely used for data, signal, and power transmission in industrial, computing, and communication systems. Their robust design ensures reliable electrical continuity and mechanical stability in demanding environments.

2. Main Types and Functional Classification

Type	Function Features	Application Examples
DE-9	9-pin configuration, compact size	RS-232 serial interfaces, PC COM ports
DB-25	25-pin configuration, parallel signal transmission	Older printer ports, industrial control systems
DC-37	37-pin high-density arrangement	Military equipment, test instrumentation
HD D-Sub	High-density double-row contacts	Video graphics (VGA), industrial automation

3. Structure and Components

Typical D-Sub connectors consist of: - Metal Shell: Zinc alloy or steel housing with EMI shielding - Insulator: High-temperature resistant thermoplastic or ceramic - Contact Arrangement: Male pins (plug) or female sockets (jack) in staggered rows - Mounting Hardware: Threaded or snap-in fixing mechanisms Contacts are usually made of phosphor bronze or beryllium copper with gold/tin plating for corrosion resistance.

4. Key Technical Specifications

Parameter	Typical Range	Significance
Current Rating	1-5 A per contact	Determines power handling capacity
Voltage Rating	50-600 V AC/DC	Ensures dielectric strength
Contact Resistance	10 m	Impacts signal integrity
Insulation Resistance	1000 M	Prevents leakage currents
Operating Temperature	-55 C to +125 C	Environmental durability

5. Application Fields

Computer peripherals (monitors, keyboards)
Industrial automation (PLCs, sensors)
Telecommunications (modems, routers)
Aerospace (avionics systems)
Test and measurement equipment

6. Leading Manufacturers and Products

Manufacturer	Representative Product
TE Connectivity	DEUTSCH D-Sub series with EMI filtering
Amphenol	High-density HD D-Sub 90-position connectors
Molex	Micro D-Sub for compact industrial applications
Samtec	High-speed D-Sub with 10 Gbps data rate

7. Selection Guidelines

Verify current/voltage requirements against contact ratings
Choose shell size based on pin count needs
Consider locking mechanisms for vibration-prone environments
Specify plating material for corrosion resistance
Ensure compliance with industry standards (e.g., MIL-DTL-24308)

8. Industry Trends

Key developments include miniaturization (sub-D connectors), hybrid designs integrating USB-C/HDMI signals, improved EMI shielding for 5G applications, and surface-mount technology (SMT) compatibility. Environmental regulations drive adoption of RoHS-compliant materials and lead-free plating solutions.