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 |
| AN11158.pdf | Understanding power MOSFET data sheet parameters | Application note | 2025-02-18 |
| AN50006.pdf | Power MOSFETs in linear mode | Application note | 2022-04-12 |
Marcom graphics (1) |
|||
| File name | Title | Type | Date |
| RS2780_PoE_blue-scr.jpg | POE MarCom image | Marcom graphics | 2020-09-16 |
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