Ethernet MagJack — RJ45 with Integrated Magnetics, PCB Mount

Ethernet MagJack — RJ45 with Integrated Magnetics, PCB Mount

An Ethernet MagJack — an RJ45 connector with integrated magnetic isolation transformer — for adding a professional Ethernet port to custom PCBs. The integrated magnetics (transformer + common-mode choke) provide IEEE 802.3 compliant isolation between the PHY chip and the Ethernet cable, protecting against ESD, ground loops, and common-mode noise. Includes LED indicator pins for link and activity status. Compatible with ENC28J60, W5500, and LAN8720 Ethernet PHY chips used in Arduino and ESP32 projects.

Key Specifications

• Connector: RJ45 with integrated magnetics (MagJack)
• Standard: 10BASE-T / 100BASE-TX (IEEE 802.3)
• Mounting: Through-hole PCB mount
• LED indicators: 2 (link + activity)
• Isolation: 1500V RMS (integrated transformer)
• Compatible PHYs: ENC28J60, W5500, LAN8720, DP83848
• Compliance: RoHS compliant

Why Choose a MagJack?

• ✅ Integrated magnetics — no separate transformer needed, simplifies PCB design
• ✅ 1500V isolation — protects PHY chip from ESD and ground loop damage
• ✅ IEEE 802.3 compliant — meets Ethernet electrical standards for reliable networking
• ✅ LED indicators — link and activity status without external components
• ✅ Compact PCB footprint — single component replaces RJ45 + separate transformer

Typical Applications

• Arduino Ethernet shield custom PCB design
• ESP32 wired Ethernet port (LAN8720 + MagJack)
• ENC28J60 or W5500 Ethernet module custom PCB
• Industrial embedded Ethernet controller PCB
• IoT gateway wired Ethernet port

Enjoy free standard shipping on all orders over $199 USD. Orders are processed within 1–2 business days.

Not satisfied? Return any item within 90 days of purchase for a full refund or exchange. Items must be in original condition.

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