What is a PoE splitter? How to choose a PoE splitter?

A PoE splitter is a device designed to separate power and data components in Power over Ethernet (PoE) signals. 

It takes the combined signal input from Power Sourcing Equipment, such as PoE switches or PoE injectors, and divides it into distinct outputs.

One for electrical power and another for network data transmission. This functionality enables non-PoE devices to receive both power and network connectivity through a single Ethernet cable.

Core Functions and Working Principles

The PoE splitter receives PoE input signals that support the IEEE 802.3af/at/bt standard (generally 48V DC + data), and separates power from data through internal circuits.

1. Power output :Converted to low-voltage direct current such as 5V/12V/24V, and supplied to non-poe devices (such as ordinary network cameras, etc.) through DC interface, Type-C interface, etc.

2. Data output : Output a pure network signal through the RJ45 network port to connect to the data port of the device. ‌

Its function is opposite to that of a PoE power supply. Essentially, it is an extended form of a Powered Device (PD), transforming non-poe terminals into PoE Powered Devices.

How to Correctly Choose a PoE Splitter? What factors need to be considered?

• Electrical parameters: Must match the standards of the Power Sourcing Equipment (PSE)

• Enter protocol compatibility : Be sure to confirm that the PoE standard supported by the PoE splitter (such as IEEE 802.3af/at/bt) is consistent with the Power Sourcing Equipment (PSE) (PoE switch / PoE injector). 

• Output voltage and current ‌: The voltage of terminal devices (such as 12V commonly used for cameras) must be strictly matched. An error exceeding ±5% may cause malfunctions. Industrial-grade equipment requires ±2% accuracy. Output current ≥ nominal current (for example, PTZ cameras need ≥2A), and a 20% margin of ‌should be reserved when fully loading.

• Power conversion efficiency ‌: A conversion efficiency of ≥90% can reduce heat generation (industrial grade requirement), and for the basic model, ≥80% is considered qualified. Low efficiency may cause unstable power supply.

• Data performance: Bandwidth and transmission reliability

• 100 Megabits (10/100 Mbps) : suitable for cameras with less than 2 million pixels.

• Gigabit (10/100/1000Mbps) : 4K camera and PTZ camera are essential. Cat6 network cable ‌is required.

• Safety protection: Isolation design and lightning protection capability

• Isolated type : Electrical isolation between input and output is achieved through an internal transformer. The current needs to be converted through electromagnetic induction (e.g., 48V input to 12V output), and there is no physical connection between the input / output terminals.
  Non-isolated type : Voltage is directly converted through inductor voltage reduction, and the input / output circuit is physically connected without isolation barriers.

• The isolated PoE splitter is safe and reliable. In security monitoring and industrial deployment, isolated types should be given priority to ensure system stability.

• Environmental adaptability: Temperature and installation method

• Operating temperature range : Basic model, 0℃ to 40℃ (Office/computer room). Industrial grade, -40℃ to 85℃ (field base stations, high-temperature workshops).

• Output interfaces ‌ : confirm the Type of power interface of the device (e.g. DC 5.5×2.1mm, DC 5.5×2.5mm,Type-C, Micro USB) ‌

As a leading provider of PoE solutions, we have developed PoE splitter that effectively address all potential issues encountered during use. 

The PoE splitter we have designed and manufactured offer the following key features:

• Active PoE splitters complies with the IEEE802.3af/at/bt protocol (SIFOS test reports can be provided).

• Isolation type, 1500-volt high-voltage isolation

• Supports 100M and 1G data transmission

• Passed FCC, RoHS, CE and other tests

• Support the selection of DC5521 and DC5525 Type-C Micro USB interface types

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  PoE Splitters Selections Table