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White Ethernet surge protector with two RJ45 ports

Ubiquiti Networks

Ubiquiti Networks ETH-SP-US Ethernet Surge Protector

SKU CH-H37W-654HR

Inline RJ45 protector grounds surges up to 1000 V/µs for gigabit PoE and non-PoE outdoor links

  • TypeEthernet Surge Protector
  • ColorWhite
  • SpecificationsInterface Connector: 2 x RJ45 female connector DC Voltage: 9
  • FeaturesProtects Outdoor PoE Devices ESD and Surge Protection Compat
  • Protects outdoor PoE devices from electrostatic discharge
  • Adds extra ESD protection layer for airMAX equipment
  • Handles gigabit speeds up to 1 Gbps throughput
  • Simple plug-and-play setup with two RJ45 ports
  • Diverts surges safely to ground via 90 V spark-over

Ubiquiti ETH-SP-US Surge Protector

The Ubiquiti ETH-SP-US is an Ethernet surge protector designed for outdoor Power-over-Ethernet and non-PoE devices. It supports network speeds up to 1 Gbps and adds a grounded layer of electrostatic discharge protection. Installation is plug-and-play using two RJ45 female connectors.

Installation Requirements

Verify that a reliable grounding point is available at the mounting location for the protector's ground wire. Confirm the device uses standard RJ45 cabling compatible with 10/100/1000 Ethernet links. The unit is rated for a DC spark-over voltage of 90 V and a peak impulse current of 700 V.

Upgrade From Basic ESD Protection

This protector replaces reliance on built-in device ESD circuits alone by adding an external ground path for surges. The jump is worth it for outdoor Ubiquiti airMAX deployments where lightning or static discharge risk is high. It maintains full Gigabit throughput with a maximum line capacitance of 1.0 pF.

Highlights

  • Protects outdoor PoE devices from electrostatic discharge
  • Adds extra ESD protection layer for airMAX equipment
  • Handles gigabit speeds up to 1 Gbps throughput
  • Simple plug-and-play setup with two RJ45 ports
  • Diverts surges safely to ground via 90 V spark-over

Specifications

BrandUBiQuiTi
ModelETH-SP-US
TypeEthernet Surge Protector
ColorWhite
SpecificationsInterface Connector: 2 x RJ45 female connector
DC Voltage: 90 V @ 100 V/s (Spark-over)
Peak Impulse Current: 700 V @ 1 kV/µs
Capacitance: 1.0 pF @ 1 MHz (maximum)
Data Line Protection: RJ45 10/100/1000 Ethernet
PoE: IEEE 802.3af support
Shock and Vibration: ETSI300-019-1.4 Standard certified
FeaturesProtects Outdoor PoE Devices
ESD and Surge Protection
Compatible with Gigabit Networks
Two Ethernet Jacks
Shipping weight0.11 kg
Package size91 × 58 × 33 mm

Questions about this item

Does the ETH-SP-US come with cables or a ground wire, or do I need to buy them separately?

The unit has two RJ45 female connectors for your existing Ethernet cables; a ground wire is not included and must be sourced separately.

Is this protector suitable for a 1 Gbps PoE link, or only for slower speeds?

It supports 10/100/1000 Mbps data rates and passes PoE power, so it works with gigabit PoE and non-PoE devices alike.

What does the 90 V spark-over voltage mean for my outdoor access point during a surge?

At 90 V the protector begins diverting excess voltage to ground, clamping transients before they reach the connected PoE device.

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