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ASFETs for Power over Ethernet (PoE)

Enhanced SOA, enhanced protection, low RDS(on), and superior power density

The latest high-power 48V Power over Ethernet standard (IEEE 802.3bt) and proprietary approaches are enabling the next generation of PoE systems. Such systems can deliver up to 100 W to each powered device, including large screen LCD displays, 5G pico-cells, advanced Wi-Fi hot-spots and pan-tilt-zoom CCTV cameras. This places increased demands on PoE power sourcing equipment (PSE). Demands that are matched by Nexperia’s dedicated PoE MOSFET family.

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ASFETs for Power over Ethernet (PoE) have been specifically designed to complement the latest high-power, PSE controllers:

  • MOSFET’s primary role is to safely manage inrush current when capacitive loads are added to the network
  • Extended enhanced Safe Operating Area (SOA) to withstand power dissipation due to short-circuit fault conditions until the PSE controller detects the fault and switches off 
  • Enhanced protection – our MOSFETs offer more than 2x the protection of competitive devices. During a cable short fault, our ASFETs for PoE can safely dissipate up to 30 W under +60 °C ambient for up to 20 ms  
  • To squeeze more high-power PoE ports into a compact router / switch requires superior power density offered by the thermal efficiency and compact footprint of the LFPAK33 package
  
    

Power Sourcing Equipment / Power over Ethernet

 

Nexperia in action

PSMN075-100MSE, PSMN040-100MSE, PSMN4R8-100BSE MOSFETs referenced in Linear Technology's LTC4279 New PSE Controller datasheet are from our differentiated ASFETs for Hotswap and Soft Start / ASFETs for Power over Ethernet portfolios.

 

Featured products

PSMN040-100MSE

PSMN040-100MSE

N-channel 100 V 36.6 mΩ standard level MOSFET in LFPAK33 designed ...

PSMN075-100MSE

PSMN075-100MSE

N-channel 100 V 71 mΩ standard level MOSFET in LFPAK33 designed specifically ...

Latest news and blogs

  • Blog article
Dec 11, 2018

Ratification of IEEE802.3bt powers new PSE/PD PoE ...

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MOSFETs for Power over Ethernet PoE PSE Applications Nexperia Quick Learning

MOSFETs for Power over Ethernet PoE PSE Applications Nexperia ...

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ASFETs for Power over Ethernet (PoE)
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Products

Type number Description Status Quick access
PSMN040-100MSE N-channel 100 V 36.6 mΩ standard level MOSFET in LFPAK33 designed specifically for high power PoE applications Production
  • Download datasheet
  • Samples
PSMN041-100MSE Development
  • Download datasheet
PSMN047-100NSE N-channel 100 V, 53 mOhm standard level ASFET with enhanced SOA in DFN2020 package. Designed specifically for high power PoE applications Development
  • Download datasheet
PSMN075-100MSE N-channel 100 V 71 mΩ standard level MOSFET in LFPAK33 designed specifically for PoE applications Production
  • Download datasheet
  • Samples
Visit our documentation center for all documentation

Application note (1)

File name Title Type Date
AN50006 Power MOSFETs in linear mode Application note 2022-04-12

Marcom graphics (1)

File name Title Type Date
RS2780_PoE_blue-scr POE MarCom image Marcom graphics 2020-09-16

Selection guide (1)

File name Title Type Date
Nexperia_Selection_guide_2022 Nexperia Selection Guide 2022 Selection guide 2022-01-05

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