Black Box Modular Adapter Kit DB25 Male to RJ45 Female (Black)

The Black Box FA4525M-BK is a modular adapter kit that converts a DB25 male RS 232 port to an RJ45 or RJ11 female jack, giving you a quick way to bridge older serial hardware with today’s structured cabling. Supplied unassembled, the kit lets you choose exactly which conductors you need by supporting 6, 8, or 10 wires. You set the pinout, snap the wires into place, and secure the adapter with the built-in thumbscrews—no soldering, no fuss.

Installers and network administrators use this kit when they need to console into routers, connect serial printers through a patch panel, or refresh equipment in a data center without pulling new cable. The housing comes in black and accepts up to six color-coded inserts, so you can label lines clearly and spot the right connection at a glance. Keep a few of these adapters in a field bag and you can handle almost any RS 232-to-modular task on the spot.

Because everything arrives in pieces, it packs flat in a toolkit and costs less than pre-wired adapters. When your wiring requirements change, simply re-pin the connectors instead of buying a new part. That flexibility makes the FA4525M-BK a practical choice for maintenance teams who work on mixed-generation equipment or organizations standardizing on RJ45 for serial management ports.

• Adapts a DB25 male RS 232 interface to an RJ45 or RJ11 female jack
• Works with 6-, 8-, and 10-wire configurations for custom pinouts
• Ships unassembled so you can wire it exactly as needed
• Black housing with optional color-coded inserts for easy identification
• Thumbscrews keep the adapter firmly attached to serial ports