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9 Pin D-Sub Male Connector | OEM Factory in China

Precision-Engineered Connectivity for Business Equipment, Industrial Automation & Data Communication

Reliable 9 Pin D-Sub Male Connector Solution

YW Precision Electronics is a trusted OEM factory in China specializing in high-quality 9 pin D-Sub male connectors (also known as DB9 male connectors). Built with precision-machined brass pins, durable metal shells, and reliable insulation housings, our connectors deliver stable signal and power transmission for a wide range of demanding applications.

Whether you’re manufacturing business equipment, electronic office systems, industrial automation gear, or medical devices, our 9 pin D-Sub male connectors offer the durability, precision, and cost-efficiency required for reliable OEM production at scale.

Key Features & Benefits

🔩 Precision-Machined Pins

Brass Pins: Gold-plated or tin-plated contacts ensure low contact resistance and stable, long-term signal transmission.

🛡️ Durable Metal Shell

Zinc Alloy / Steel Shell: Provides mechanical protection, EMI/RFI shielding, and a secure mating interface for repeated connect/disconnect cycles.

⚡ Stable Signal & Power Transmission

Low Insertion Loss: Engineered for consistent data and power transmission, critical for control systems, PLCs, and automation equipment.

⚙️ Multiple Mounting Options

Flexible Termination: Available with solder cup, PCB right-angle, PCB straight, IDC, and crimp termination to fit diverse OEM designs.

🏭 OEM & ODM Factory Direct

Custom Manufacturing: Factory-direct pricing from China with support for custom plating, shell finishes, packaging, and private labeling.

✅ Industry-Standard Compatibility

DE-9 / DB9 Standard: Fully interchangeable with standard 9-pin D-Sub female counterparts used across legacy and modern equipment.

Technical Specifications

Electrical Parameters

Parametro	Specifiche	Notes
Pin Configuration	9-pin (2 rows: 5 + 4), DE-9 standard	Standard D-Sub layout
Valutazione attuale	1A – 5A per contact	Depends on pin gauge and plating
Tensione nominale	50V – 250V AC/DC	Application-dependent
Resistenza di contatto	≤ 10mΩ	Ensures minimal signal loss
Resistenza all'isolamento	≥ 1000MΩ @ 500VDC	High electrical isolation
Dielectric Withstanding Voltage	1000V AC / 1 minute	/

Physical Specifications

Dimension	Valore	Standard
Conteggio dei pin	9 pins (male)	DE-9 / DB9 standard
Shell Size	Shell size 1 (E-size)	D-Sub industry standard
Materiale di contatto	Brass / Phosphor Bronze	Gold or tin plated
Shell Material	Zinc Alloy / Steel / Plastic	Nickel or tin plated finish available
Insulator Material	Thermoplastic (PBT / Nylon)	UL94V-0 flame-rated
Temperatura di esercizio	-55°C to +105°C	Standard range

Termination & Mounting Options

Termination Type	Description	Typical Use
Solder Cup	Manual wire soldering to each pin	Cable assemblies, custom harnesses
PCB Right-Angle	Through-hole mount at 90° to board	Panel-mount equipment, PLCs
PCB Straight	Vertical through-hole mount	Internal board-to-board connections
IDC (Insulation Displacement)	Ribbon cable termination without stripping	High-volume production cabling
Crimpare	Individually crimped contacts	Field-serviceable, high-reliability applications

Applications of 9 Pin D-Sub Male Connector

The 9 pin D-Sub male connector remains one of the most widely adopted interconnect solutions across a broad range of sectors, valued for its proven reliability, standardized form factor, and broad compatibility:

Primary Application Sectors

Business Equipment: Point-of-sale terminals, barcode scanners, cash registers, and retail hardware requiring serial (RS232) connectivity
Electronic Office Systems: Printers, copiers, fax machines, and multifunction devices needing stable data interfaces
Automazione industriale: PLC programming ports, HMI panels, sensors, and factory automation controllers
Data Communications: RS232/RS422/RS485 serial links, modems, network switches, and legacy communication equipment
Medical Equipment: Diagnostic instruments, patient monitors, and laboratory analyzers requiring reliable serial data connections
Robotic Machinery: Robot controller interfaces, motion control feedback, and servo drive communication
Control Systems and PLCs: Industrial control cabinets, programmable logic controllers, and SCADA system interfaces
Signal and Power Transmission: Low-voltage power distribution combined with control signal transmission in compact equipment designs

Common Use Cases

Serial console connections for programming and configuring PLCs and industrial controllers
Interfacing legacy RS232 equipment with modern automation systems
Data logging connections between measurement instruments and computers
Cable harness assemblies for CNC machines and robotic arms
Panel-mount connectors on medical diagnostic and monitoring devices
Office equipment internal wiring and external serial peripheral connections

Why Choose Our 9 Pin D-Sub Male Connector?

Caratteristica	9 Pin D-Sub Connector	Connettore M12	USB / RJ45
Form Factor	Compact D-shell, 2-row 9-pin	Round, threaded coupling	Rectangular, tool-free plug
Sigillatura ambientale	IP20 (standard), IP67 with hood/boot option	IP67/IP68	IP20 (typical)
Durata	500+ mating cycles	500+ mating cycles	100-500 cycles
Industry Standardization	DE-9 / EIA-574 (RS232)	IEC 61076-2-109	USB-IF / IEEE 802.3
Legacy Equipment Compatibility	Excellent (industry standard for decades)	Limited (newer standard)	Limited for older serial systems
Cost Efficiency	Very cost-effective for OEM production	Moderate	Low to moderate

Installation & Wiring Guide

Pre-Installation Checklist

Confirm your equipment requires male (pin-type) rather than female (socket-type) connector
Verify pinout configuration matches your RS232/RS422/RS485 or custom signal assignment
Check current and voltage ratings against your application requirements
Select the correct termination type (solder cup, PCB mount, IDC, or crimp) for your assembly process
Review shell material and plating for your environmental and shielding needs

Installation Methods

Solder Cup Assembly: Best for custom cable assemblies requiring flexible wire routing
PCB Mounting: Ideal for panel-mount equipment with direct board-level integration
IDC Termination: Fast, high-volume production assembly using ribbon cable
Crimp Contacts: Preferred for field-serviceable or high-reliability harnesses

Wiring Tips

Follow standard RS232 pinout conventions (TXD, RXD, RTS, CTS, DSR, GND, DCD, DTR, RI) unless using a custom signal map
Use appropriate wire gauge (typically 24-28 AWG) for signal-level connections
Secure the shell with screw-lock or jack-screw hardware to prevent accidental disconnection
Apply strain relief boots for cable assemblies subject to flexing or vibration
Perform continuity and insulation resistance testing after assembly, before installation
For shielded cable applications, ensure the shell is properly grounded to reduce EMI

Domande frequenti (FAQ)

Q1: What industries use 9 pin D-Sub male connectors?

9 pin D-Sub male connectors are widely used in business equipment, electronic office systems, industrial automation, data communications, medical equipment, robotic machinery, control systems and PLCs, and general signal and power transmission applications requiring a compact, reliable serial interface.

Q2: What is the difference between a 9 pin D-Sub male and female connector?

The male connector has protruding pins, while the female connector has recessed sockets that receive the pins. Male and female connectors must be paired correctly based on your equipment’s port type; most computer and controller serial ports use a male DE-9 connector, requiring a female cable connector, though configurations vary by device.

Q3: What current and voltage ratings do 9 pin D-Sub connectors support?

Standard 9 pin D-Sub male connectors typically support 1A to 5A per contact and working voltages from 50V to 250V AC/DC, depending on contact plating and shell design. Always confirm ratings against the specific product datasheet for your application.

Q4: How long do D-Sub connectors last?

Our 9 pin D-Sub male connectors are rated for 500+ mating cycles, with metal shell versions offering long-term mechanical durability under normal industrial use. Actual service life depends on environmental exposure and handling frequency.

Q5: Can 9 pin D-Sub connectors be used outdoors or in harsh environments?

Standard D-Sub connectors are rated IP20 and best suited to indoor or enclosed environments. For outdoor or harsh conditions, we offer optional environmentally sealed hoods, backshells, and boots to improve dust and moisture resistance. For fully waterproof requirements, our M12 connector line may be a better fit.

Q6: What termination options are available?

We offer solder cup, PCB right-angle, PCB straight, IDC (insulation displacement), and crimp termination styles, allowing you to select the best option for your cable assembly or board-mount design.

Q7: Is the 9 pin D-Sub male connector compatible with RS232 equipment?

Yes. The 9 pin D-Sub (DE-9) connector is the industry-standard interface for RS232 serial communication and remains compatible with a wide range of legacy and modern equipment using the standard pinout.

Q8: How do I troubleshoot connection problems?

First, inspect for bent, corroded, or misaligned pins. Test continuity with a multimeter across each contact. Confirm the pinout matches your intended signal assignment. Ensure the connector is fully mated and the shell screws are secured. Replace the connector if pins show visible wear or oxidation.

Q9: Can you provide custom plating or shell finishes?

Yes. As an OEM/ODM factory, we support custom gold or tin plating thickness, nickel-plated or black-oxide shell finishes, custom packaging, and private labeling for bulk and project-based orders.

Q10: What’s the lead time for OEM orders from your China factory?

Standard 9 pin D-Sub male connectors typically ship within 5-10 business days. Custom-tooled or large-volume OEM orders may require 2-4 weeks depending on specification complexity. Contact our sales team at [email protected] for a lead time quote based on your requirements.

Certifications & Standards

Our 9 pin D-Sub male connectors meet international quality and industry standards:

EIA-574 (RS232)
MIL-DTL-24308 Reference
ISO 9001:2015
UL94V-0 Insulator
RoHS Compliant
CE Marked
REACH Compliant
Custom OEM/ODM Available

Looking for a Reliable 9 pin D-Sub Connector Supplier?

Partner with our OEM factory in China for competitively priced, high-quality 9 pin D-Sub male connectors. Our team provides technical support, custom manufacturing, and fast, reliable order fulfillment.

Request a Quote Today

Telefono: Available upon request
E-mail: [email protected]
Response Time: Within 24 business hours

Additional Resources & Documentation

9 Pin D-Sub Connector TechnicalManual (PDF) – Complete specifications, pinout, and assembly guide
RS232 Pinout Reference Chart – Standard signal assignments for 9 pin D-Sub connectors
Connector Comparison Chart – D-Sub vs M12 vs USB vs RJ45
Troubleshooting Guide – Common D-Sub connector issues and solutions
Telecommunications Industry Association (TIA) – Official RS232/EIA standards body (external link)
Blog: Selecting the Right D-Sub Connector for Your OEM Project – Expert tips and industry insight

About 9 Pin D-Sub Connectors & OEM Manufacturing

The 9 pin D-Sub connector, standardized as DE-9 and long associated with the RS232 serial interface, remains one of the most enduring and widely deployed connector formats in electronics manufacturing. Its distinctive D-shaped metal shell prevents incorrect insertion, while its two-row, 9-contact layout provides a compact yet reliable interface for both legacy and modern equipment.

Elettronica di precisione YW is a leading OEM/ODM factory based in China, supplying high-quality 9 pin D-Sub male connectors, cable assemblies, and connector components to manufacturers worldwide. With deep experience serving business equipment, industrial automation, medical device, and robotics markets, we understand the precision and consistency required for dependable serial connections in mission-critical equipment.

Whether you’re designing new office equipment, upgrading an industrial control panel, or sourcing components for a robotics platform, our 9 pin D-Sub male connectors deliver the durability, signal integrity, and manufacturing consistency your OEM production requires. We offer standard products for fast delivery as well as fully custom solutions tailored to your specifications.

Why 9 Pin D-Sub Connectors Still Matter

Proven Reliability: Decades of field deployment have proven the DE-9 connector’s mechanical and electrical reliability across countless applications.
Broad Compatibility: Continued use in industrial, medical, and office equipment ensures ongoing demand for high-quality replacement and OEM parts.
Manufacturing Flexibility: Multiple termination styles and shell finishes allow the same base connector to serve diverse OEM designs.
Cost Efficiency: Mature manufacturing processes keep unit costs low without sacrificing quality, ideal for high-volume OEM production.
Standardized Design: Compliance with EIA-574 and related standards ensures compatibility with a global base of existing equipment.

Parte NO	YWSDC-P09B0000	Tempi di consegna	3-4 settimane
Corrente nominale	5A	Tensione nominale	250V CA/CC
Posizione	9 pin	Quantità d'ordine	Piccolo ordine disponibile
Temperatura di esercizio	Da -40 a +105℃	Durata dell'accoppiamento	500 cicli per flash d'oro da 30u

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