Bipolar transistors

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Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

ASFETs for PoE, eFuse and relay replacement

Enhanced SOA in a range of compact packages

Nexperia’s ASFETs for PoE, eFuse & relay replacement are designed with low-power applications in mind, including Power-over-Ethernet (PoE), low-power inrush management, eFuse and relay replacement. Using the same silicon technology as the bigger ‘ASFETs for hotswap’, these smaller ASFETs deliver enhanced SOA for low-power linear-mode applications in a range of compact DFN2020 (2 x 2 mm) and LFPAK33 (3.3 x 3.3 mm) packages.

Power Sourcing Equipment / Power over Ethernet
Power Sourcing Equipment / Power over Ethernet

ASFETs for PoE, eFuse & relay replacement have been specifically designed to complement the latest high-power, PSE controllers:

  • ASFETs primary role is to:
    • Safely manage capacitive inrush current when Powered Devices (PD’s) are connected to Power sourcing Equipment (PSE’s).
    • Provide current limit & shutdown to safely manage overload conditions & cable faults.
  • ASFETs for PoE combine industry leading enhanced Safe Operating Area (SOA) and low RDS(on).
  • ASFETs for PoE are available in LFPAK33 (3.3 x 3.3 mm) and space-saving DFN2020 (2 x 2 mm) package.
  • ASFETs deliver superior linear-mode capability, power density and thermal efficiency in a compact footprint.
  • Enabling designers to squeeze more high-power PoE ports into a compact router / switch.
  • Also suitable for eFuse & relay replacement where superior fault tolerance is required.

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.

 

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ASFETs for PoE, eFuse and relay replacement
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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
PSMN047-100NSE N-channel 100 V, 53 mOhm standard level ASFET with enhanced SOA in DFN2020. Designed for high power PoE, inrush management, eFuse and relay replacement Production
PSMN071-100NSE N-channel 100 V, 82 mOhm standard level ASFET with enhanced SOA in DFN2020. Designed for high power PoE, inrush management, eFuse and relay replacement Production
PSMN075-100MSE N-channel 100 V 71 mΩ standard level MOSFET in LFPAK33 designed specifically for PoE applications Production
Visit our documentation center for all documentation

Application note (2)

File name Title Type Date
AN50006.pdf Power MOSFETs in linear mode Application note 2022-04-12
AN11158.pdf Understanding power MOSFET data sheet parameters Application note 2020-07-06

Marcom graphics (1)

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

Selection guide (1)

File name Title Type Date
Nexperia_Selection_guide_2023.pdf Nexperia Selection Guide 2023 Selection guide 2023-05-10

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Cross reference