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LP2019NL 10/100BASE-TX VoIP Magnetics Module with PoE Support

Categories PoE LAN Transformer
Brand Name: LINK-PP
Model Number: LP2019NL
Certification: UL,RoHS,Reach,ISO
Place of Origin: Guangdong,China
MOQ: 400/2000/10K/25K
Price: $0.06-$1.2
Payment Terms: TT,NET30/60/90 Days
Supply Ability: 5KK/Month
Delivery Time: About 3-5 Days
Packaging Details: T&R
Product Name: LP2019NL Ethernet Magnetics Module
Ethernet Standard: IEEE 802.3 10/100BASE-TX
PoE Support: Yes (up to 600 mA)
Use Cases: VoIP phones, IP phones, Ethernet switches
Turns Ratio: 1CT:1CT (TX / RX)
Isolation Voltage: 1500 Vrms
Operating Temperature: 0 °C to +70 °C
Mounting Type: Surface Mount
Compliance: RoHS
Manufacturer: LINK-PP LAN Transformer Supplier
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LP2019NL 10/100BASE-TX VoIP Magnetics Module with PoE Support


The LP2019NL is a compact 10/100BASE-TX Ethernet magnetics module designed for VoIP, LAN, and Power over Ethernet (PoE) applications. It integrates high-performance isolation transformers optimized for Fast Ethernet signal integrity while supporting PoE power delivery up to 600 mA.

LP2019NL is widely used in SOHO networking equipment, LAN-on-Motherboard (LOM) designs, Ethernet hubs, switches, IP phones, and ADSL modems, where stable data transmission and reliable isolation are critical.

Manufactured to meet RoHS compliance and rated for 250 °C peak solder temperature, the LP2019NL offers excellent manufacturability and long-term reliability.


LP2019NL Power Over Ethernet Transformer​ Key Features:


  • Supports 10/100BASE-TX Ethernet applications
  • Integrated PoE magnetics, up to 600 mA current capability
  • Optimized for VoIP and IP phone designs
  • Low insertion loss and excellent return loss performance
  • High common-mode and differential-mode noise rejection
  • 1500 Vrms isolation voltage
  • Compact surface-mount package
  • RoHS compliant ("NL" version)
  • Peak reflow solder rating: 250 °C

Electrical Specifications (@25 °C)


Electrical SpecificationsValue / Condition
Turns RatioTX: 1CT : 1CT RX: 1CT : 1CT
Insertion Loss0.1–100 MHz: -1.0 dB Max
Return Loss0.1–30 MHz: -18 dB Min
30–60 MHz: -13 dB Min
60–80 MHz: -12 dB Min
Crosstalk0.1–100 MHz: -35 dB Min
Differential-to-Common Mode Rejection (DCMR)30 MHz: -42 dB Min
60 MHz: -36 dB Min
100 MHz: -33 dB Min
Common Mode Rejection Ratio (CMRR)1–100 MHz: -40 dB Typ
Inductance (OCL)Pins 1–3, 6–8: 350 µH Min @ 100 kHz, 0.1 V, 8 mA DC Bias
DC Resistance (DCR)Pins 1–3, 6–8: 0.9 Ω Max
Leakage Inductance (LK)1–3 (Tie: 16+14): 0.5 µH Max @ 100 kHz, 0.1 V
6–8 (Tie: 11+9): 0.5 µH Max @ 100 kHz, 0.1 V
Interwinding Capacitance (Cw/w)(1–3), (16–14): 28 pF Max @ 100 kHz, 0.1 V
(6–8), (11–9): 28 pF Max @ 100 kHz, 0.1 V
Isolation Voltage1500 Vrms

Environmental & Mechanical Specifications


SpecificationValue / Condition
Operating Temperature0 °C to +70 °C
RoHS ComplianceYes (NL suffix)
Package TypeSurface Mount
Body DimensionsLength: 12.70 mm Width: 8.89 mm (typ.) Height: 7.15 mm max

LP2019NL Pin Configuration & Circuit Description


The LP2019NL integrates separate transmit (TX) and receive (RX) isolation transformers with center taps, suitable for Fast Ethernet PHY interfaces.


  • TX Side: Pins 1 (TD+), 2 (TCT), 3 (TD−)
  • RX Side: Pins 6 (RD+), 7 (RCT), 8 (RD−)
  • Cable Side TX: Pins 16 (TX+), 15 (TXCT), 14 (TX−)
  • Cable Side RX: Pins 11 (RX+), 10 (RXCT), 9 (RX−)

This configuration supports PoE power injection through the center taps while maintaining signal isolation and EMI control.


Typical Applications of PoE Magnetics Module


  • VoIP phones
  • IP telephones
  • Ethernet switches (10/100 Mbps)
  • Ethernet hubs
  • LAN-on-Motherboard (LOM)
  • SOHO networking equipment
  • ADSL modems

Compliance & Reliability


  • IEEE 802.3 compliant (10/100BASE-TX)
  • PoE-ready magnetics design
  • RoHS compliant
  • Suitable for automated SMT assembly

FAQ-Ethernet Magnetics


Q1: What is the LP2019NL used for?

The LP2019NL is used in 10/100BASE-TX Ethernet interfaces to provide signal isolation, impedance matching, and noise suppression. It is commonly deployed in VoIP phones, IP telephones, Ethernet switches, and SOHO networking equipment.


Q2: Does LP2019NL support Power over Ethernet (PoE)?

Yes. LP2019NL is designed for PoE-enabled Ethernet applications and supports a continuous current of up to 600 mA, making it suitable for IP phones and other PoE-powered devices.


Q3: Is LP2019NL compatible with IEEE 802.3 standards?

Yes. LP2019NL complies with IEEE 802.3 10/100BASE-TX electrical and isolation requirements and is suitable for Fast Ethernet PHY designs.


Q4: What is the turns ratio of LP2019NL?

The transformer uses a 1CT:1CT turns ratio on both the transmit (TX) and receive (RX) channels, ensuring signal symmetry and PHY compatibility.


Q5: What isolation voltage does LP2019NL provide?

LP2019NL provides an isolation rating of 1500 Vrms, meeting standard Ethernet safety and isolation requirements.


Q6: Is LP2019NL suitable for VoIP and IP phone designs?

Yes. LP2019NL is optimized for VoIP and IP phone applications, offering low insertion loss, strong common-mode noise rejection, and reliable PoE power handling.


Q7: Is LP2019NL RoHS compliant?

Yes. The NL suffix indicates full RoHS compliance and a peak reflow solder temperature rating of 250 °C.


Summary


The LP2019NL 10/100BASE-TX VoIP Magnetics Module is a compact, PoE-ready Ethernet transformer solution designed for Fast Ethernet applications. With high isolation voltage, excellent EMI performance, and compliance with IEEE 802.3 standards, LP2019NL is a reliable choice for VoIP phones, IP telephones, and Ethernet networking equipment.


China LP2019NL 10/100BASE-TX VoIP Magnetics Module with PoE Support factory
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