Overview of 100Base-T RJ45 Conenctor:

The LPJ4012AHNL from LINK-PP is a 10/100BASE-T Single Port RJ45 Female Connector featuring integrated LEDs and EMI shielding.
It is designed for Fast Ethernet (IEEE 802.3) applications such as network switches, routers, media converters, and embedded Ethernet interfaces.

Key Features & Benefits

• Integrated Magnetics (MagJack) – Combines isolation transformer and common-mode choke into a single connector to simplify PCB layout.
• Tab-Down Structure – Ideal for bottom-mount or limited-space board designs.
• Dual LEDs (Green/Yellow) – Clear visual feedback for link and activity status.
• Enhanced EMI Shielding – Metal shell and ground tabs minimize electromagnetic interference.
• Wide Temperature Range (-40 °C ~ +85 °C) – Suitable for industrial and outdoor network applications.
• Through-Hole Construction – Provides mechanical stability and strong solder retention.
• RoHS & REACH Compliant – Environmentally friendly and globally accepted.

LPJ4012AHNL 10/100BASE-T Magjack Specifications:

LPJ4012AHNL Drawing:

LPJ4012AHNL.pdf

Electrical Specifications (@25 °C):

1. Turn Ratio (±2%)

 TX = 1CT : 1CT  RX = 1CT : 1CT

2. Inductance (OCL)

 ≥ 350 µH min @ 100 kHz, 0.1 V, 8 mA DC Bias

3. Insertion Loss

 ≤ –1.0 dB (max) @ 1–100 MHz

4. Return Loss

 –18 dB (min) @ 1–30 MHz

 –15 dB (min) @ 30–60 MHz

 –12 dB (min) @ 60–80 MHz

 –10 dB (min) @ 80–100 MHz

5. Crosstalk

 –40 dB (min) @ 30 MHz

 –35 dB (min) @ 60 MHz

 –30 dB (min) @ 100 MHz

6. Common Mode Rejection (CMR)

 –40 dB (min) @ 30 MHz

 –35 dB (min) @ 60 MHz

 –30 dB (min) @ 100 MHz

7. Hi-Pot

 1500 Vrms

8. Operating Temperature Range

 –40 °C to +85 °C