Skip to main content
Auusda 16" Business Laptop, AMD Ryzen 5 3500U, 32GB RAM 1TB SSD, Backlit Keyboard, Fingerprint Unlock, Windows 11 Pro Computer, Black
  •  
  • $549.99 –
  • Save: 31%
Login to Make an Offer
Sold by Newegg

Shipped by Newegg

Price alert

Best Sellers

Top Rated
4 (3,725 total ratings)
  • $14.01
Shop it at NeweggBusiness.

BELKIN F4C170 DB9F to RJ45F Modular Adapter

  • Adapter Type: RJ-45/Serial
  • Connector on First End: 1 x 9-pin DB-9 Female
  • Connector on Second End: 1 x RJ-45 Female
+
+
Overview
Specs
Reviews
See all Q & A

Any questions? Ask CelesteSM will help you find out quickly.

MAIN OVERVIEW FEATURES: Adapter Type: RJ-45/SerialConnector on First End: 1 x 9-pin DB-9 FemaleConnector on Second End: 1 x RJ-45 Female

Warranty & Returns

Warranty, Returns, And Additional Information

Return Policies

    We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.

  • Return for refund until: January 31, 2027
  • Return for replacement until: January 31, 2027
  • This item is covered by Newegg.com's Extended Holiday Return Policy.
  • Read full return policy for details.
LOADING...
LOADING...

The Belkin F4C170 is a modular data-transfer adapter with a female 9-pin DB-9 connector on one end and a female RJ-45 connector on the other, suited to users whose equipment requires this specific serial-to-RJ-45 connection.

Recommended For

  • Serial and control-system technicians building a custom connection between DB-9 equipment and RJ-45 cabling, when they can verify and configure the required pinout.
  • IT technicians maintaining legacy serial equipment who need DB-9-to-RJ-45 connector adaptation and can match the adapter wiring to the device’s console pinout.
  • Installers who want to use a chosen length of Cat5e/Cat6 cable for a serial-control run, rather than relying on a fixed-length cable, and can confirm the pinout at both ends.
  • Repair-bench or lab users making a one-off serial interconnect when the equipment specifically requires female DB-9 and female RJ-45 connectors.

Spec Summary

AttributeValue
Best ForConnecting a PC or desktop between a DB-9 serial interface and an RJ-45 connection
Connector ConfigurationDB-9 female to RJ-45 female modular data-transfer adapter
Model IdentifiersBelkin F4C170
Physical SpecificationsGray, matte finish; weighs 0.05 pounds and measures 1 × 1 × 2.5 inches
Package Contents1 adapter