DB9 Female Right Angle PCB Mount D-SUB Connector

Specifications

• Product Type: D-SUB Right Angle PCB Header
  
• Gender: Female (Socket)
  
• Pin Count: 9 Pins (DB9)
  
• Pitch (Pin Spacing): Standard D-SUB 2.77mm
  
• Mounting Orientation: Right Angle (Horizontal Through-Hole)
  
• Mounting Hardware: Integrated Board-Locks with Dual Threaded Hex Nut Standoffs
  
• 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, Glass-filled PBT Insulator (UL94V-0)
  
• Compatible Interfaces: RS232, RS422, RS485 Serial Communication

Project Evolution

Unlock New Capabilities

• Past Projects (Prerequisites): If you've already built projects using basic TTL serial communication (UART) between microcontrollers or worked with USB-to-TTL adapters, you're familiar with sending serial data streams. Upgrading to an RS232 DB9 female right-angle connector is the natural next step for interfacing microcontrollers with legacy industrial machinery, CNC controllers, laboratory equipment, or telecom devices operating on full RS232 signal standards.
• Feature Upgrade (What This Unlocks): This DB9 female right-angle D-SUB connector unlocks low-profile, right-angle panel mounting and robust RS232 connectivity for custom PCBs and industrial enclosures. Featuring integrated metal board-locks and dual threaded hex standoffs, it prevents mechanical strain on delicate solder joints during repeated cable insertion and removal.

Effort Level & Minimum Hardware

Effort Level: Beginner / Intermediate 

Minimum hardware to get started:

• MAX232 / MAX3232 RS232 to TTL Level Shifter Module — required to convert high-voltage RS232 signals (±12V) from the DB9 port to safe 3.3V or 5V logic levels for your microcontroller GPIOs.
  
• Soldering Iron & Solder — necessary to solder the 9 through-hole pins and board-lock tabs cleanly to your custom circuit board.
  
• DB9 Male Cable / Serial Peripheral — required to plug into this female socket to establish data communication.

Virtual Technician & Pinout Guide

⚠️ Safety Warnings:

• Voltage Level Warning: RS232 signals operate at ±3V to ±15V levels. Connecting these pins directly to 3.3V or 5V microcontroller GPIOs (like Arduino or ESP32) without a MAX232 level shifter will instantly destroy the microcontroller.
  
• Thermal Solder Limit: Limit soldering iron contact time to under 3 seconds per pin at 300°C–320°C to prevent melting the internal PBT plastic pin isolators.
  
• Pin Alignment Check: Ensure board-lock clips align cleanly with PCB mounting holes before soldering to prevent mechanical stress on pin solder joints.

 Package Includes: 

1× DB9 Female Right-Angle PCB Mount D-SUB Connector

Frequently Asked Questions

1. What is the exact pin spacing and gender of this DB9 connector?
   This is a 9-pin Female (Socket) D-SUB connector featuring standard 2.77mm pin pitch spacing for PCB mounting.
2. Is this DB9 female right-angle connector compatible with standard RS232 serial cables?
   Yes, it features a standard DB9 female socket interface with dual threaded hex nut standoffs that securely receive male DB9 cable plugs.
3. Can I connect this directly to 3.3V or 5V microcontrollers like Arduino or ESP32?
   No, standard RS232 signals operate at ±12V levels; you must use an RS232-to-TTL level shifter module (such as a MAX232 chip) to protect your microcontroller GPIOs.
4. What is the maximum current rating per pin for this DB9 female connector?
   Each contact pin is rated for up to 3A AC/DC continuous current.
5. What is the maximum operating voltage rating between adjacent pins? The connector is rated for an operating voltage of up to 250V AC/DC Max with a dielectric withstanding voltage of 500V AC.
6. What mounting orientation does this DB9 female header use?
   It features a right-angle (horizontal) through-hole PCB mounting orientation, allowing serial cables to plug in parallel to the circuit board.
7. How does the connector anchor securely to the circuit board?
   It incorporates dual metal board-lock clips and front threaded hex nut standoffs that absorb mechanical insertion stress and prevent solder joint fatigue.
8. Does this DB9 female connector require any software drivers or library code?
   No, this is a passive physical connector hardware component and requires no software drivers or microcontroller libraries.
9. What Baud rate does this physical connector support?
   As a passive hardware connector, it supports all standard serial baud rates (from 9600 bps up to 115200 bps and beyond) dictated by your transceiver IC.
10. How do I prevent thermal damage to the internal plastic insulation during soldering?
    Maintain soldering iron temperature between 300°C–320°C and limit contact time to under 3 seconds per pin.
11. What should I do if a male RS232 plug will not thread into the connector standoffs?
    Ensure the male cable thumb screws match standard #4-40 UNC serial thread specifications and check for foreign debris in the hex nuts.
12. Why am I getting corrupted data when testing RS232 serial communication?
    Verify that TX and RX lines are properly swapped (null modem configuration if applicable) and confirm a shared GND connection between devices.
13. Are these DB9 female right-angle connectors quality checked at Probots? Yes, every batch undergoes visual inspection at Probots in Bangalore to verify straight terminal pins, pristine plating, and intact threaded standoffs.
14. Is volume pricing available for commercial machinery manufacturers and university labs?
    Yes, Probots offers tier pricing and bulk dispatch for industrial automation OEMs, R&D labs, and educational institutions.
15. Does Probots carry matching DB9 male connectors and RS232 breakout boards?
    Yes, we stock male DB9 connectors, MAX232 converter modules, and DB9 terminal breakout boards in our Bangalore store.