Power over Ethernet (PoE)

Part Number	Description / PDF	Quantity
TP-POE-18G Tycon Systems, Inc.	18V 24W GIGABIT POE POWER INSERT	0
POE-48 American Electrical, Inc.	POE INJECTOR 95W	0
CG-POE-CESBT Coolgear	50W POE TO USB-C PD POWER ADAPTE	19
3785 Adafruit	POE SPLITTER WITH MICROUSB PLUG	666
PW180KA4800F01 SL Power Electronics - Manufacturer of Condor / Ault Brands	POE INJECTOR 20W 48V DESKTOP	0
TP-POE++10G Tycon Systems, Inc.	56V 60W 4PAIR 10/100/1000/10000M	96
TP-POE-HP-24G Tycon Systems, Inc.	24V 36W HIGH POWER GIGABIT POE P	56
PD-9501-10GC/AC-EU Roving Networks / Microchip Technology	1-PORT BT 60W 10G AC EU CORD	4
TP-POE+10G Tycon Systems, Inc.	53V 30W 802.3AT 10/100/1000/1000	83
PD-9001GO-ET/AC Roving Networks / Microchip Technology	1P MIDSPAN OUTDOOR EXTENDED TEMP	27
POE80U-560(G) PHIHONG USA	POE INJECTOR 80W 56V DESKTOP	28
PD-3501G/AC-US Roving Networks / Microchip Technology	POE INJECTOR 15.4W 48V DESKTOP	166
POE125U-8-C PHIHONG USA	POE INJECTOR 15.4W DESKTOP	2
PD-9001-10GC/AC-EU Roving Networks / Microchip Technology	1-PORT AT 30W 10G EU CORD	10
POE125U-4-AT PHIHONG USA	POE INJECTOR 33.6W DESKTOP	0
TP-POE-HP-48GDX2 Tycon Systems, Inc.	110/220VAC IN, QTY 2 25W 802.3AF	10
POE576U-16AT-N PHIHONG USA	POE INJECTOR 30W RACK	20
TP-DC-2448GDX2-HP Tycon Systems, Inc.	18-36VDC IN, QTY 2 PORTS 802.3AF	10
POE60D-560(G) PHIHONG USA	POE SPLITTER 60W 50-57V DESKTOP	33
TP-POE-1824G Tycon Systems, Inc.	48V 802.3AF/AT INPUT, GIGABIT, S	0

Power over Ethernet (PoE)

1. Overview

Power Supplies (PSUs) provide electrical energy to devices, categorized as external (AC adapters) or internal (mounted within devices). Power over Ethernet (PoE) integrates data and power delivery over Ethernet cables, enabling efficient power management for networked devices. PoE eliminates redundant cabling, reduces installation costs, and supports flexible device deployment in modern applications like IoT, surveillance, and smart buildings.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
PoE (IEEE 802.3af)	Up to 15.4W, legacy devices	IP phones, basic surveillance cameras
PoE+ (IEEE 802.3at)	Up to 30W, dynamic power allocation	PTZ cameras, video phones
PoE++ (IEEE 802.3bt Type 3/4)	60W (Type 3), 90W (Type 4), 4-pair power	Wireless APs, LED lighting, thin clients
UPoE (Cisco Universal PoE)	Up to 60W, proprietary protocol	Digital signage, high-power sensors

3. Structure and Components

PoE systems consist of Power Sourcing Equipment (PSE) and Powered Devices (PD). PSEs (e.g., switches, injectors) include controllers for power negotiation, isolation transformers, and protection circuits. PDs (e.g., cameras, APs) feature rectifiers, DC-DC converters, and signature detection circuits. External PSUs typically use AC-DC conversion, while internal PSUs integrate DC-DC modules.

4. Key Technical Specifications

Parameter	Importance
Power Output (W)	Determines device compatibility (e.g., 15.4W for VoIP phones)
Efficiency (80 PLUS Rating)	Reduces energy waste and operational costs
Input Voltage Range	Ensures adaptability to global power standards (100-240V AC)
Protection Features	Overcurrent, overvoltage, and short-circuit protection
Compliance Standards	IEEE 802.3af/at/bt, UL 62368-1

5. Application Fields

Enterprise networks: Wireless access points, VoIP phones
Surveillance: IP cameras, PTZ domes
Smart buildings: LED lighting control, IoT sensors
Healthcare: Medical monitoring devices, mobile carts

6. Leading Manufacturers and Products

Vendor	Representative Product
Cisco Systems	Catalyst 9200L Series PoE switches
Microchip Technology	PoE++ (90W) controllers for PDs
TP-Link	TalkTalk L2+ PoE managed switches
Dell Technologies	PowerEdge R760xa with integrated PoE+

7. Selection Recommendations

Match power output with device requirements (e.g., 90W for high-density APs)
Verify IEEE standard compatibility for interoperability
Evaluate thermal management for high-power PoE++ deployments
Consider managed PoE switches for remote monitoring and QoS control

8. Industry Trends

Future developments include higher power delivery (90W+), improved energy efficiency (80 PLUS Titanium), and integration with IoT ecosystems. Standards like IEEE 802.3bt enable multi-gigabit PoE for 5G small cells and edge computing devices. Smart PoE systems with AI-driven power allocation are emerging for dynamic load management in data centers.