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Monoprice 100461 DB9 Female to DB25 Male Serial Cable - 3ft — main product image
Monoprice 100461 DB9 Female to DB25 Male Serial Cable - 3ft
Monoprice 100461 DB9 Female to DB25 Male Serial Cable - 3ft
Monoprice 100461 DB9 Female to DB25 Male Serial Cable - 3ft
Monoprice

Monoprice 100461 DB9 Female to DB25 Male Serial Cable - 3ft

★★★★★4.3 (24 reviews)

Reliable DB9-to-DB25 serial adapter cable from Monoprice for connecting legacy devices with molded connectors and thumbscrews.

$4.75*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Monoprice 100461 DB9 Female to DB25 Male Serial Cable is a purpose-built adapter cable designed for connecting devices that use different serial port standards. With a female DE-9 (DB-9) socket on one end and a male DB-25 plug on the other, this cable bridges the gap between newer PCs with 9-pin serial ports and older peripherals or equipment that rely on the 25-pin serial interface. The cable uses a straight-through AT modem wiring configuration, mapping the 9 pins of the DE-9 connector to the corresponding pins on the DB-25 connector.

Built with Monoprice's molded connector design, each end features thumbscrews that allow you to lock the cable securely into place, preventing accidental disconnections during use. At 3 feet in length, the cable is well-suited for desktop setups where the connected devices are close together, such as linking a PC to a serial modem, industrial controller, or laboratory instrument. While serial connectivity is less common in modern computing, this cable remains essential for professionals and hobbyists working with legacy hardware.

Key Features

This cable features a female DE-9 (DB-9) socket on one end and a male DB-25 plug on the other

The 9 pins of the DE-9 connector are wired to 9 of the pins on the DB-25 connector

Quality at a Fair Price: Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices

Specifications

Brand
Monoprice
Model
100461
Connector 1
DB9 Female (DE-9 Socket)
Connector 2
DB25 Male (Plug)
Cable Type
AT Modem Cable (Straight-Through)
Length
3 Feet
Connector Style
Molded with Thumbscrews

Pros & Cons

👍 Pros

  • Molded connectors with thumbscrews provide a secure and durable connection
  • Short 3-foot length keeps cable runs tidy and reduces clutter
  • Affordable price point from Monoprice without sacrificing build quality
  • Standard pinout wiring makes it compatible with common serial devices

👎 Cons

  • 3-foot length may be too short for setups where devices are farther apart
  • Only useful for legacy serial equipment, which is increasingly uncommon
  • Does not support null modem configuration without an additional adapter
  • No shielding specifications listed, which may matter in electrically noisy environments

Frequently Asked Questions

One end has a DB9 female (DE-9 socket) connector and the other has a DB25 male plug, making it suitable for connecting a PC serial port to older peripherals that use the 25-pin serial interface.
This is a straight-through AT modem cable, not a null modem cable. The 9 pins on the DE-9 connector are wired directly to the corresponding 9 pins on the DB-25 connector.
The cable is 3 feet (approximately 0.9 meters) in length.
Yes, both the DB9 and DB25 connectors feature molded construction with thumbscrews to ensure a secure, reliable connection that won't accidentally disconnect.

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