DB9 Female Straight Solder Type D-SUB Connector

Specifications

• Product Type: D-SUB Straight Solder Cup / Cable Socket Header
  
• Gender: Female (Receptacle / Socket Contacts)
  
• Pin Count: 9 Pins (2-Row Standard DB9 / DE-9)
  
• Pitch (Pin Spacing): Standard D-SUB 2.77mm
  
• Termination Style: Rear Solder Cups (Solder Bucket)
  
• Mounting Type: Panel Mount / Cable Mount (Flanged)
  
• Mounting Hardware: Dual Panel-Mount Flange Holes (3.05mm)
  
• Current Rating: 3A Continuous per pin
  
• Rated Voltage: 250V AC/DC Max
  
• Contact Resistance: 15mΩ Max
  
• Insulation Resistance: 1000MΩ Min at 500V DC
  
• Dielectric Withstanding Voltage: 500V AC for 1 minute
  
• Operating Temperature: -55°C to +105°C
  
• Material: Nickel-plated Steel Shell, Blue 
  
• Compatible Interfaces: RS232, RS422, RS485, CAN Bus, Industrial Serial, CNC Control

Project Evolution

Unlock New Capabilities

• Past Projects (Prerequisites): If you've already built projects using basic microcontroller UART modules, jumper cables, or breadboards, you're familiar with basic point-to-point serial communication. Upgrading to the DB9 female straight solder-type D-SUB connector is the natural next step for routing RS232, RS422, or CAN bus signals through panel-mount enclosures or custom cable assemblies without relying on loose, temporary jumpers.
• Feature Upgrade (What This Unlocks): This DB9 female straight solder-type connector unlocks durable wire-to-panel and cable-end socket connections for 9-wire serial assemblies. Featuring two staggered rows of female socket contacts, rear solder cups for direct wire soldering, and dual panel-mount flange holes, it ensures secure signal paths and mechanical locking against front or rear panel cutouts.

Effort Level & Minimum Hardware

Effort Level: Beginner / Intermediate 

Minimum hardware to get started:

• Soldering Iron & Solder — required to solder connecting wires securely into the individual rear solder cups.
• DB9 Male Cable / Mating Plug Harness — necessary to plug into this female socket header to route RS232 serial data or low-voltage control signals.
• Custom Enclosure / Panel Cutout — required to mount the connector flange securely using standard hardware to prevent mechanical stress on wire solder joints.

Virtual Technician & Pinout Guide

⚠️ Safety Warnings:

• Voltage Level Warning: Verify RS232 signal voltage levels before applying power. Standard RS232 signals operate at ±3V to ±15V levels; interfacing directly with 3.3V or 5V microcontrollers (ESP32, Arduino) without a MAX232 level converter will permanently damage the GPIO pins.
• Thermal Solder Limit: Limit soldering iron contact time to under 3 seconds per solder cup at 300°C–320°C to avoid softening or deforming the internal blue PBT plastic pin isolator.
• Short-Circuit Prevention: Slide heat shrink tubing over each individual wire before soldering to insulate every solder cup joint and prevent short circuits between adjacent terminals.

Package Includes: 

1× DB9 Female Straight Solder Type D-SUB Connector 

Frequently Asked Questions

1. What is the exact pin count and gender of this DB9 connector?
   This is a 9-pin Female (Receptacle / Socket Contacts) D-SUB connector (DE-9) with standard 2-row staggered 2.77mm pitch pin spacing, designed for straight solder-bucket cable assembly or panel mounting.
2. Is this DB9 female solder connector compatible with standard male DB9 serial ports?
   Yes, it features a standard 2-row DB9 female socket layout that securely mates with standard 9-pin male DB9 cable plugs, PC serial ports, and RS232 breakout modules.
3. Can I use this DB9 female connector for VGA monitor cables?
   No, standard VGA cables use 15-pin High-Density (HD15) 3-row connectors, whereas this connector is a standard 9-pin 2-row DB9 interface.
4. What is the maximum continuous current rating per socket contact?
   Each solid female contact socket is rated for up to 3A AC/DC continuous current.
5. What is the maximum operating voltage rating for this connector?
   The connector is rated for up to 250V AC/DC Max with a dielectric withstanding voltage of 500V AC for 1 minute.
6. What termination style does this straight DB9 female connector use?
   It uses rear solder cups (solder buckets), allowing individual stranded or solid copper wires to be tinned and soldered directly to each socket pin.
7. How does this connector mount to custom panels or enclosures?
   It features two standard 3.05mm mounting flange holes on the nickel-plated steel shell for secure screw fastening against enclosure cutouts.
8. Does this DB9 female solder connector require any software driver or code library?
   No, this is a passive physical connector hardware component and requires no software drivers, microcode, or microcontroller libraries.
9. Does this connector support RS232, RS422, and CAN Bus protocols?
   Yes, as a passive physical interface, it carries RS232, RS422, RS485, CAN Bus differential signals, and low-voltage DAQ lines regardless of baud rate.
10. How do I prevent thermal damage to the blue plastic pin isolator during soldering?
    Keep your soldering iron temperature between 300°C–320°C and limit contact time to under 3 seconds per solder cup.
11. How do I avoid short circuits between adjacent solder cups on a tight DB9 assembly?
    Slide individual pieces of heat shrink tubing over every wire lead prior to soldering, then shrink them over the completed joints to fully isolate each terminal.
12. What should I do if a serial signal channel shows intermittent continuity? Inspect solder joints for cold welds or solder bridges, verify continuous ground shielding on the metal shell, and clean flux residue with isopropyl alcohol.
13. Are these DB9 female straight solder connectors quality inspected at Probots?
    Yes, every batch undergoes visual QC inspection at Probots in Bangalore to confirm straight female contact sockets, pristine nickel shell plating, and intact blue PBT isolators.
14. Is bulk/tiered pricing available for R&D labs and machinery OEMs?
    Yes, Probots offers tier discounts and bulk dispatch for industrial automation OEMs, university laboratories, and commercial machinery manufacturers across India.
15. Does Probots stock matching DB9 male connectors and metal hood backshells?
    Yes, we carry matching male DB9 straight solder connectors, DB9 terminal breakout boards, and protective plastic/metal hood housings in our Bangalore store.