Component Sense Blog

Now in Stock: BCM5421SA2KQMG | Broadcom 10/100/1000BASE-T Gigabit Ethernet PHY IC | Brand New, Fully Traceable, and Ready to Ship!

Written by Ash Arya | 05-Jun-2026

The BCM5421SA2KQMG from Broadcom is a 10/100/1000 Ethernet PHY IC designed for high-speed wired networking and communication applications.

If you’re working on networking equipment, telecom systems, embedded communication hardware, or Ethernet-enabled devices that need reliable Gigabit Ethernet physical-layer connectivity, this part is a dependable choice.

This device is part of Broadcom’s BCM5421 product family and is described as a fully integrated 10/100/1000BASE-T Gigabit Ethernet transceiver.

Here’s what you’re getting with this part:

Key Features of the BCM5421SA2KQMG

It supports 10/100/1000BASE-T Gigabit Ethernet connectivity.

The BCM5421SA2KQMG supports 10BASE-T, 100BASE-TX, and 1000BASE-T Ethernet, making it suitable for systems that require flexible wired network connectivity across different Ethernet speeds.

It works as a fully integrated Ethernet transceiver.

It is a fully integrated Gigabit Ethernet transceiver that supports physical-layer communication between Ethernet-enabled systems and standard copper cabling.

It supports surface-mount PCB assembly.

The BCM5421SA2KQMG is listed as an SMD IC, making it suitable for compact surface-mount designs in electronics and communication hardware.

It is built for networking and communication equipment.

This part is suitable for applications that require dependable Ethernet connectivity, including networking hardware, telecom equipment, embedded systems, and industrial communication devices.

It helps support PB-free and RoHS-compliant manufacturing.

This stock is listed as PB-free, helping support compliance requirements for electronics manufacturers working with RoHS-regulated products.

Applications of the BCM5421SA2KQMG

This part is typically used in:

  • Networking equipment
  • Ethernet switches
  • Routers and gateways
  • Telecom infrastructure
  • Embedded communication hardware
  • Industrial Ethernet systems
  • Network interface cards
  • Broadband access equipment
  • Repair and maintenance projects
  • Legacy system support