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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
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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
- 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.
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.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-800-223-5546
- Support Website
- View other products from Belkin
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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
| Attribute | Value |
|---|---|
| Best For | Connecting a PC or desktop between a DB-9 serial interface and an RJ-45 connection |
| Connector Configuration | DB-9 female to RJ-45 female modular data-transfer adapter |
| Model Identifiers | Belkin F4C170 |
| Physical Specifications | Gray, matte finish; weighs 0.05 pounds and measures 1 × 1 × 2.5 inches |
| Package Contents | 1 adapter |



