MIC24121-5308W-LF3 Integrated RJ45 Connector Surface Mount

MIC24121-5308W-LF3 is a 10/100BASE-T SMT RJ45 connector with integrated magnetics, 2250V isolation, 350µH OCL, –40 to +85°C.

Key Features of MIC24121-5308W-LF3 SMT Magjack

• SMT RJ45 Connector with integrated magnetics
• Supports 10/100BASE-T Fast Ethernet
• Single-port (1×1) RJ45 configuration
• 1:1 turns ratio (±2%) for PHY compatibility
• High open circuit inductance: 350 µH min.
• High isolation voltage: 2250 VDC
• Excellent return loss, crosstalk, and common-mode rejection
• Surface-mount, reflow soldering compatible
• Wide operating temperature: –40 °C to +85 °C

Electrical Specifications (@ 25 °C unless otherwise noted)

Fast Ethernet SMT RJ45 MIC24121-5308W-LF3 Drawing:

Compliance & Reliability of 10/100BASE-T SMT RJ45

• Designed in accordance with IEEE 802.3 Fast Ethernet requirements
• Suitable for lead-free SMT assembly processes
• Industrial-grade temperature performance
• Proven solution used in Ethernet magnetic modules and magjack designs

Design Notes for SMT RJ45 Connector Applications

MIC24121-5308W-LF3 integrates Ethernet magnetics directly inside the RJ45 connector housing, allowing designers to eliminate discrete transformer components.

This improves signal integrity, reduces EMI, and simplifies PCB routing in high-density layouts.
The high isolation voltage and strong common-mode rejection make it suitable for industrial Ethernet environments.

Typical Applications

1. SMT RJ45 connectors for Ethernet ports
2. Fast Ethernet LAN interfaces (10/100 Mbps)
3. Embedded systems and industrial controllers
4. Network switches, routers, gateways
5. IoT devices and communication equipment
6. Consumer and industrial Ethernet products

LINK-PP is a professional designer and Manufacturer of magnetic telecom and networking components. Founded in Shenzhen in 1997 and began to develop Discrete Transformer. With over 26 years of experience in innovation and technology leadership. Our main products include RJ45 Connectors, LAN Transformers, and SFP Modules. We focus on improving product reliability and durability.

Main Production Lines

◆ 10/100/1000/10GBase-T LAN Isolation Transformer and Filter

◆ Rj45 Modular Jack With Integrated 10/100/1000/10G Magnetics
◆ Magnetic Rj45 Jack with POE/ POE+; IEEE823.3af/ IEEE802.3at
◆ LAN Transformer With POE/ POE+; IEEE823.3af/ IEEE802.3at
◆ T1/E1,T3/DS3/E3/STS-1 Interface LAN transformer
◆ ISDN,HDSL,ADSL and VDSL Transformer and splitter

◆ Optical Transceivers