MIC66211-5171T-LF3/7499210121 RJ45 PoE Connector Rectifier Bridge LPJ4049HDNL

PoE RJ45 Connector MIC66211-5171T-LF3 = 7499210121 Overview

The MIC66211-5171T-LF3/7499210121 is a single-port RJ45 Connector with integrated magnetics (transformer, common-mode choke, and rectifier bridge) designed specifically for 10/100Base-T PoE applications. It features a tab-down side-entry configuration with yellow/green LED indicators, offering compact and reliable connectivity for industrial and networking applications.

1. 10/100 Ethernet RJ45 IEEE 802.3af PoE
2. 6μ” Gold Plating (min) on Contacts
3. 350uH min OCL at 8mA DC Bias Across the
4. Full Temp Range Power Over Ethernet RJ45 Magnetics Module
5. 100% Electrical Testing
6. 1500Vrms Hi-Pot
7. Proprietary Robust Contact Design 

ELECTRICAL SPECIFICATIONS @25℃

1.Turn Ratio(±2%):
TX=1CT∶1 RX=1CT∶1
2. Inductance OCL: 350uH MIN
@ 100KHz/0.1V,8mA DC Bias
3. Insertion Loss:
-1.0dB MAX @ 1.0-100MHz
4. Return Loss:
-18dB MIN @ 1-10MHz
-16dB MIN @ 10-30MHz
-12dB MIN @ 30-60MHz
-10dB MIN @ 60-100MHz
5. Cross-talk:
-40dB MIN @ 1-30MHz
-35dB MIN @ 30-60MHz
-30dB MIN @ 60-100MHz
6. Common Mode Rejection:
-30dB MIN @ 1-50MHz
-20dB MIN @ 50-150MHz
7. Hipot Test: 1500Vrms MIN
8. Operating Temperature Range: -40℃ TO +85℃.

RJ45 Connector Datasheet

FAQ

1. What is a PoE RJ45 Connector?

A PoE (Power over Ethernet) RJ45 connector integrates Ethernet magnetics and sometimes rectifiers, allowing both data and power to be transmitted over a single Ethernet cable. It simplifies PCB design and supports devices like IP cameras, VoIP phones, and industrial controllers.

2. How does a PoE RJ45 Connector differ from a standard RJ45 connector?

Unlike standard RJ45 connectors, a PoE RJ45 connector features built-in magnetics (transformers and chokes) and PoE compatibility, enabling safe power delivery (as per IEEE 802.3af/at/bt standards) alongside data transmission.

3. What are the typical applications of PoE RJ45 connectors?

• IP security cameras
• Wireless access points
• Industrial PCs and monitoring systems
• Smart meters and IoT gateways
• VoIP phones
• Renewable energy devices like solar inverters

4. What standards do PoE RJ45 connectors support?

Most PoE RJ45 connectors comply with:

• IEEE 802.3af (PoE, up to 15.4W)
• IEEE 802.3at (PoE+, up to 30W)
• Some advanced models support IEEE 802.3bt (PoE++ / 4PPoE, up to 60–90W).

5. How to choose the right PoE RJ45 connector?

Key factors to consider:

• Supported data rate (10/100Base-T, Gigabit, or higher)
• PoE power level (af, at, or bt)
• Operating temperature range
• Hi-pot isolation voltage
• LED indicators (for link/activity status)
• Compliance with UL, RoHS, and REACH

6. Are PoE RJ45 connectors backward compatible?

Yes. A PoE RJ45 connector can still work with non-PoE devices because power delivery only activates when a compatible powered device (PD) is detected. This ensures safe operation with legacy Ethernet equipment.

7. What are the advantages of using integrated PoE RJ45 connectors?

• Saves PCB space by combining magnetics and RJ45 in one component
• Improves EMI performance
• Simplifies circuit design and reduces BOM cost
• Provides higher reliability and better thermal performance for industrial environments