Power over Ethernet (PoE)

Part Number	Description / PDF	Quantity
POEA30U-1AT-X-R PHIHONG USA	IEEE802.3AT - POE DESKTOP C14 10	0
POEA30U-1AT-5-R PHIHONG USA	IEEE802.3AT - POE DESKTOP C14 5	1
POE125U-4-AT-N PHIHONG USA	POE INJECTOR 33.6W DESKTOP	1
PD-9001GR/SP/AC-EU Roving Networks / Microchip Technology	1-PORT AT 30W 1G SURGE AC EU COR	4
POE370U-480-16-N PHIHONG USA	POE INJECTOR 15.4W RACK	7
GT-96300-3656-R3A-AP GlobTek, Inc.	POE INJECTOR 56V 36W WALL MOUNT	27
PD-9501GCI/DC Roving Networks / Microchip Technology	1-PORT INDUSTRIAL 60W BT	15
POE21-240 PHIHONG USA	POE SPLITTER 21W 24V DESKTOP	244
PD-9501GC/AC-EU Roving Networks / Microchip Technology	1-PORT BT 60W 1G AC EU CORD	23
POE-24I Laird - Antennas	POE INJECTOR 19.2W 24V DESKTOP	58
PD-9001GR/AT/AC-US Roving Networks / Microchip Technology	POE INJECTOR 30W 55V DESKTOP	0
TP-POE-2456GD Tycon Systems, Inc.	24V PASSIVE POE TO GIGABIT 802.3	0
TP-MS308 Tycon Systems, Inc.	MID SPAN HIGH POWER 16.8W POE IN	0
TP-MS316 Tycon Systems, Inc.	MID SPAN HIGH POWER 16.8W POE IN	0
PD-9501GR/AC Roving Networks / Microchip Technology	POE INJECTOR 60W 55V DESKTOP	32
POE75U-1UP PHIHONG USA	POE INJECTOR 75W 56V DESKTOP	501
PD-3504G/AC-US Roving Networks / Microchip Technology	4-PORT AF 15.4W AC INPUT US CORD	0
TP-POE-HP-48DX2 Tycon Systems, Inc.	110/220VAC IN, QTY 2 25W 802.3AF	0
POE14-033 PHIHONG USA	POE SPLITTER 8.25W 3.3V DESKTOP	22
PD-3504G/AC-UK Roving Networks / Microchip Technology	4-PORT AF 15.4W AC INPUT UK CORD	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.