Power over Ethernet (POE)

Power over Ethernet (PoE) is a technology that lets network cables carry electrical power. It allows IP telephones, wireless LAN Access Points, Security network cameras and other IP-based terminals to receive power, in parallel to data, over the existing CAT-5 Ethernet infrastructure without the need to make any modifications in it. PoE integrates data and power on the same wires; it keeps the structured cabling safe and does not interfere with concurrent network operation.


A typical PoE system consists of Power sourcing equipment (PSE) and a powered device (PD). The PSE may either be an Endspan (L2 Ethernet switch supporting PoE) or a Midspan (PoE hub). The PD is a PoE-enabled terminal such as an IP phone, Wireless LAN access point, etc. PSE provides the power on the cable for the PD.


The IEEE 802.3af, also called Data Terminal Equipment (DTE) Power via Media Dependent Interface (MDI), is the first international standard to define the transmission of power over Ethernet infrastructure. This standard specifies the protocol for delivery of a nominal 48 Vdc over unshielded twisted-pair cables (such as CAT-5), eliminating the need for a local power source for the remote device. It consumes less than 13 watts of power.


The PoE facility was developed to reduce the cost of network planning, cabling and installation. PoE saves time and money by avoiding the need for separate installation of Data and Power infrastructures. PoE makes network planning flexible and independent of switch cabinets and power sources, and also saves additional outlay for power and telephone networks (VoIP).


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  Manufacturer Part No Order Code Manufacturer / Description
Availability Price For
Price (Incl GST)
Quantity
MAX5971BETI+
MAX5971BETI+ - Power Over Ethernet (POE) Controller, 60 V/, 25 kHz Switch/Clock, 28.5 V UVLO Threshold, TQFN-28

2514243

MAXIM INTEGRATED PRODUCTS

Power Over Ethernet (POE) Controller, 60 V/, 25 kHz Switch/Clock, 28.5 V UVLO Threshold, TQFN-28

POE & PSE CONTROLLER, QUAD, 60V, TQFN-28; Input Voltage:60V; Output Current:-; UVLO:28.5V; Controller IC Case Style:TQFN; No. of Pins:28Pins; Duty Cycle (%):-; Frequency:25kHz; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Product Rang

  • 57 available for 4 - 5 business days delivery
+ Check Stock & Lead Times

  • 57 available for 4 - 5 business days delivery: (UK stock) Order before 23:35 Mon-Fri (excluding National Holidays)

More stock available week commencing 14/09/20

Restricted Item
MAX5980GTJ+T
MAX5980GTJ+T - Power Over Ethernet (POE) Controller, 60 V/7 mA, 400 kHz Switch/Clock, 29V UVLO Threshold, TQFN-32

2517223

MAXIM INTEGRATED PRODUCTS

Power Over Ethernet (POE) Controller, 60 V/7 mA, 400 kHz Switch/Clock, 29V UVLO Threshold, TQFN-32

POE PD CTRL, 60V, TQFN-32; Input Voltage:60V; Output Current:-; UVLO:29V; Controller IC Case Style:TQFN; No. of Pins:32Pins; Duty Cycle (%):-; Frequency:400kHz; Operating Temperature Min:-40°C; Operating Temperature Max:105°C; Product Range:-; RoHS Phtha

  • 1,693 available for 4 - 5 business days delivery
+ Check Stock & Lead Times

  • 1,693 available for 4 - 5 business days delivery: (UK stock) Order before 23:35 Mon-Fri (excluding National Holidays)

More stock available week commencing 9/11/20

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Packaging Options
Suggested replacement for:2517223
2517223RL in Re-reel

Restricted Item
NCP1090DG
NCP1090DG - Power Over Ethernet (POE) Controller, 57 V/500 mA, 3.6 V UVLO Threshold, SOIC-8

1901642

ON SEMICONDUCTOR

Power Over Ethernet (POE) Controller, 57 V/500 mA, 3.6 V UVLO Threshold, SOIC-8

POE-PD, INTERFACE CTLR, 8-SOIC; Input Voltage:57V; Output Current:-; UVLO:-; Controller IC Case Style:SOIC; No. of Pins:8Pins; Duty Cycle (%):-; Frequency:-; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Product Range:-; RoHS Phthalate

  • 274 available for 4 - 5 business days delivery
+ Check Stock & Lead Times

  • 274 available for 4 - 5 business days delivery: (UK stock) Order before 23:35 Mon-Fri (excluding National Holidays)

More stock available week commencing 15/03/21

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TPS2378DDA .
TPS2378DDA . - Power Over Ethernet (POE) Controller, 57 V/ 500 µA, 40 V UVLO Threshold, SOIC-8

2144277

TEXAS INSTRUMENTS

Power Over Ethernet (POE) Controller, 57 V/ 500 µA, 40 V UVLO Threshold, SOIC-8

POE, IEEE802.3AT TYPE2, 0.85A, 8SOIC; Input Voltage:57V; Output Current:850mA; UVLO:-; Controller IC Case Style:SOIC; No. of Pins:8Pins; Duty Cycle (%):-; Frequency:-; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Product Range:-; RoHS

No Longer Stocked

Restricted Item
LT4295IUFD#PBF
LT4295IUFD#PBF - Power Over Ethernet (POE) Controller, 60 V/2 mA, 214 kHz Switch/Clock, QFN-28

2629294

LINEAR TECHNOLOGY

Power Over Ethernet (POE) Controller, 60 V/2 mA, 214 kHz Switch/Clock, QFN-28

POE CONTROLLER, IEEE 802.3BT PD, QFN-28; Input Voltage:60V; Output Current:-; UVLO:-; Controller IC Case Style:QFN; No. of Pins:28Pins; Duty Cycle (%):50%; Frequency:214kHz; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Packaging:Each;

No Longer Stocked

Restricted Item
TPS2378EVM-105 .
TPS2378EVM-105 . - Evaluation Board, PoE High-Power PD Interface, AUX Control

2379427

TEXAS INSTRUMENTS

Evaluation Board, PoE High-Power PD Interface, AUX Control

EVALUATION BOARD, POE / PD CONTROLLER; Silicon Manufacturer:Texas Instruments; Silicon Core Number:TPS2378; Kit Application Type:Power Management; Application Sub Type:Power Over Ethernet (POE), Powered Device(PD) Controller; Kit Contents:Eval Board TPS2

No Longer Stocked

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LM5072MH-80
LM5072MH-80 - Power Over Ethernet (POE) Controller, 60 V/1.5 mA, 1 MHz Interface, 6.25V UVLO Threshold, TSSOP-16

1286769

TEXAS INSTRUMENTS

Power Over Ethernet (POE) Controller, 60 V/1.5 mA, 1 MHz Interface, 6.25V UVLO Threshold, TSSOP-16

IC, POE COMBO 100V, POWERWISE; Input Voltage:9V; Output Current:-; UVLO:6V; Controller IC Case Style:HTSSOP; No. of Pins:16Pins; Duty Cycle (%):80%; Frequency:645kHz; Operating Temperature Min:-40°C; Operating Temperature Max:125°C; Product Range:-; RoHS

No Longer Manufactured

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