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Home > Products > LINK-PP Magnetics > LP82440ANL 1000 BASE-T PoE Discrete LAN Magnetics (24-Pin SMD)

LP82440ANL 1000 BASE-T PoE Discrete LAN Magnetics (24-Pin SMD)

Product Details

Place of Origin: China

Brand Name: LINK-PP

Certification: UL,RoHS,Reach,ISO

Model Number: LP82440ANL

Document: LP82440ANL.pdf

Payment & Shipping Terms

Minimum Order Quantity: 50pcs

Price: $ 0.34

Packaging Details: Reel

Delivery Time: In Stock Ship Within 3 Days

Payment Terms: L/C,D/A,D/P,T/T,Western Union

Supply Ability: 5KK/Month

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Highlight:

LP82440ANL

,

4.0mm Profile LAN Transformer

,

1000 BASE-T PoE LAN transformer

Part Number:
LP82440ANL
OCL:
350 µH Min
DCR:
1.2 Ω Max
Hi-pot:
1500 Vrms
Data Rate:
1000Base-T
Number Of Channels/Ports:
Single
PoE:
PoE
Mounting Type:
SMT
Turns Ratio:
1:1
Operating Temperature Range:
-40°C To +85°C
Part Number:
LP82440ANL
OCL:
350 µH Min
DCR:
1.2 Ω Max
Hi-pot:
1500 Vrms
Data Rate:
1000Base-T
Number Of Channels/Ports:
Single
PoE:
PoE
Mounting Type:
SMT
Turns Ratio:
1:1
Operating Temperature Range:
-40°C To +85°C
LP82440ANL 1000 BASE-T PoE Discrete LAN Magnetics (24-Pin SMD)


The LINK-PP LP82440ANL is an industrial-grade, single-port Gigabit (1000 BASE-T) discrete surface-mount LAN transformer module engineered for high-density networking backplanes, telecom blade servers, and compact Power over Ethernet (PoE) systems. Featuring an ultra-low-profile 4.0 mm maximum height in a 24-pin SOP gull-wing SMD package, it integrates 4 symmetrical 1CT:1CT isolation channels, low leakage inductance (≤0.5 μH), and cable-side center taps designed for seamless PoE power injection. Tested to 1500 Vrms dielectric isolation and rated for -40°C to +85°C, it delivers carrier-grade signal integrity for mission-critical transceivers.




Quick Specifications Matrix


Parameter Specification Engineering Benefit
Ethernet Speed 1000 BASE-T (Gigabit Ethernet) Fully compliant with IEEE 802.3 gigabit transceivers
Component Height 4.0 mm Maximum (Ultra-Low Profile) Ideal for backplanes, thin PCIe daughter cards, and blade systems
PoE Compatibility PoE / PoE+ Capable Line-side center taps (MCT1–MCT4) dedicated for DC power extraction
Operating Temp -40°C to +85°C (True Industrial) Guaranteed operation in unventilated sealed industrial enclosures
Turns Ratio 1CT : 1CT ±5% (All 4 Channels) Symmetrical matching for voltage-mode and current-mode PHYs
Inductance (OCL) 350 µH Min. (@ 100 kHz, 100 mV, 8 mA DC) Prevents core saturation under line DC current imbalances
Insertion Loss -1.0 dB Max. (1 ~ 100 MHz) Superior power throughput and longer cable reach margins
Leakage Inductance 0.5 µH Maximum Minimizes high-frequency ringing and jitter on gigabit pulse edges
DC Resistance (DCR) 1.2 Ω Maximum Reduces internal thermal dissipation under PoE load
High-Pot Isolation 1500 Vrms Minimum Complies with international safety and surge isolation standards




LP82440ANL LAN Transformer Drawing - Mechanical and Schematic


LP82440ANL LAN Transformer Drawing  - Mechanical


LP82440ANL LAN Transformer Drawing - Schematic




Electrical Specifications (@ 25°C)


Parameter Test Condition Specification Limit
Turns Ratio 100 kHz, 100 mV 1CT : 1CT (±5%)
Open Circuit Inductance (OCL) 100 kHz, 100 mV, 8 mA DC Bias 350 µH Minimum
Insertion Loss 1 ~ 100 MHz -1.0 dB Maximum
Leakage Inductance (LL) 100 kHz, 100 mV 0.5 µH Maximum
DC Resistance (DCR) Primary & Secondary 1.2 Ω Maximum
Return Loss (100 Ω Load) 1 ~ 30 MHz -16.0 dB Minimum
Return Loss (100 Ω Load) 30 ~ 60 MHz -12.0 dB Minimum
Return Loss (100 Ω Load) 60 ~ 80 MHz -10.0 dB Minimum
Return Loss (100 Ω Load) 80 ~ 100 MHz -8.0 dB Minimum
Crosstalk (Near-End) 1 ~ 100 MHz -30.0 dB Minimum
Differential to Common Mode (DCMR) 1 ~ 100 MHz -30.0 dB Minimum
Dielectric Withstand (Hi-Pot) 60 Seconds (PHY Side to Line Side) 1500 Vrms Minimum
Operating Temperature Range Continuous Industrial -40°C to +85°C




Pin Assignment & Schematic Architecture


PHY / TRANSCEIVER SIDE                                     LINE / RJ45 SIDE (PoE CAPABLE)
  Pin 2  (TD1+) ───┐ 1CT:1CT ┌─── Common Mode ─── Pin 23 (MX1+)
                   )         (       Choke
  Pin 3  (TD1-) ───┴─────────┴─────────────────── Pin 22 (MX1-)
  Pin 1  (TCT1) ─── Center Tap                    Pin 24 (MCT1) ─── PoE Tap 1

  Pin 5  (TD2+) ───┐ 1CT:1CT ┌─── Common Mode ─── Pin 20 (MX2+)
                   )         (       Choke
  Pin 6  (TD2-) ───┴─────────┴─────────────────── Pin 19 (MX2-)
  Pin 4  (TCT2) ─── Center Tap                    Pin 21 (MCT2) ─── PoE Tap 2

  Pin 8  (TD3+) ───┐ 1CT:1CT ┌─── Common Mode ─── Pin 17 (MX3+)
                   )         (       Choke
  Pin 9  (TD3-) ───┴─────────┴─────────────────── Pin 16 (MX3-)
  Pin 7  (TCT3) ─── Center Tap                    Pin 18 (MCT3) ─── PoE Tap 3

  Pin 11 (TD4+) ───┐ 1CT:1CT ┌─── Common Mode ─── Pin 14 (MX4+)
                   )         (       Choke
  Pin 12 (TD4-) ───┴─────────┴─────────────────── Pin 13 (MX4-)
  Pin 10 (TCT4) ─── Center Tap                    Pin 15 (MCT4) ─── PoE Tap 4





SMT Reflow Profile & Mechanical Dimensions


Parameter Specification
Package Size 15.1 mm (Length) × 7.1 mm (Body Width) × 10.0 mm (Total Span)
Total Height 4.0 mm Max.
Pin Pitch 1.0 mm pitch
Lead Width 0.40 mm
Recommended PCB Land Pattern Pad Width: 0.60 mm; Pad Length: 1.35 mm; Overall Row Span: 10.7 mm
IR Reflow – Preheat Zone 150°C ~ 200°C (60–180 seconds)
IR Reflow – Liquidus Temperature (TL) 217°C (60–150 seconds)
IR Reflow – Peak Temperature (TP) 250°C (+0/−5°C); dwell time 5 seconds max.
Maximum Reflow Cycles 2 times max.
Tape & Reel Packaging Carrier Width: 24 mm; 800 pcs per 13" reel
Carton Packaging 4,800 pcs / 6 reels



Frequently Asked Questions


Q1: Can LP82440ANL be used for Power over Ethernet (PoE) circuits?

Answer: Yes. The LP82440ANL is designed with dedicated line-side center taps on Pins 15, 18, 21, and 24 (MCT1 to MCT4). These center taps allow direct connection to onboard PoE PD (Powered Device) or PSE (Power Sourcing Equipment) controllers, supporting IEEE 802.3af and 802.3at power delivery over all four Ethernet pairs.


Q2: What makes the LP82440ANL ideal for backplane and blade server applications?

Answer: Its 4.0 mm maximum low-profile height and industrial-grade temperature rating (-40°C to +85°C) make it specifically compliant with dense telecom backplane architectures (such as CompactPCI, VPX, and ATCA), where vertical clearance between stacked circuit cards is strictly limited.


Q3: How does LP82440ANL compare to Pulse HX5008NL?

Answer: The LP82440ANL is a 100% form, fit, and function drop-in replacement for the Pulse HX5008NL. Both share an identical 24-pin SMD layout, 1CT:1CT turns ratio, 350 µH minimum OCL at 8 mA DC bias, -1.0 dB insertion loss, and industrial temperature range, requiring no PCB layout revisions.