Power over Ethernet

Power over Ethernet, also known as PoE, is a standard in which power is transferred via Ethernet cable. This cable is a twisted pair which allows the connection of both data and power, and is usually in the format of an RJ-45 cable. Power over Ethernet allows straight forward installation of network devices as it provides both the power and data connection in one.

PoE devices are designed to sit within a circuit and help to inject or extract power into Ethernet data lines. They provide protection to the system, such as overcurrent and under-powering. PoE applications are also very easy to install, therefore minimising the risk of error.

Power over Ethernet ICs come in a standard semiconductor package, such as a QFN or SOIC.

What are PoE standards?

Power over Ethernet uses IEEE standards which enable interoperability between PoE-compatible devices and software. PoE uses the IEEE 802.3af and IEEE 802.3at (PoE+) standards.

Types of Power over Ethernet IC:

  • PoE PD (powered device)
  • PoE PSE (power sourcing equipment)

Where are PoE devices used?

Power over Ethernet can be found in applications which require connection to a network and to a power source. They are commonly used in PoE mid-spans, switches and injectors. These are found in telecommunications, IP cameras, IP TVs, network routers and intelligent lighting.


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Description Price PoE Controller Type Minimum Input Voltage Maximum Input Voltage Minimum Operating Temperature Maximum Operating Temperature Package Type Pin Count Dimensions Height Length Width Mounting Type
RS庫存編號 822-6569
製造零件編號LTC4263CS#PBF
HK$63.86
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Power Sourcing Equipment (PSE) 33 V 66 V 0 °C +70 °C SOIC 14 8.738 x 3.988 x 1.498mm 1.498mm 8.74mm 3.988mm Surface Mount
RS庫存編號 200-3698
製造零件編號Si3471A-A01-IM
HK$23.98
/個 (每包:2個)
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Power Sourcing Equipment (PSE) 44 V - -40 °C 85 °C QFN 38 7 x 5 x 0.85mm 0.85mm 7mm 5mm Surface Mount
RS庫存編號 121-9238
製造零件編號TPS2375D
HK$20.981
毎管:75 個
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Powered Device (PD) - - -40 °C +85 °C SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm 3.91mm Surface Mount
RS庫存編號 200-3697
製造零件編號Si3471A-A01-IM
HK$26.45
毎管:31 個
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Power Sourcing Equipment (PSE) 44 V - -40 °C 85 °C QFN 38 7 x 5 x 0.85mm 0.85mm 7mm 5mm Surface Mount
RS庫存編號 665-8977
製造零件編號TPS2375D
HK$24.772
/個 (每包:5個)
單位
Powered Device (PD) - - -40 °C +85 °C SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm 3.91mm Surface Mount