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S5751-L8P2HX-RUA
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Huawei

S5751-L8P2PN2J-RUA

S5751-L8P2PN2J-RUA (8*10/100/1000BASE-T ports (6*PoE+), 2*10/100/1000/2.5GBASE-T ports (PoE+), 2*2.5GE SFP ports, 128 W PoE, with 1*220 V AC power adapter, Fanless)

Brand

Huawei
Port

8
Rate

GE
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SKU: 98012494 Category:
Description

Huawei S5751-L8P2PN2J-RUA: Innovative PoE-Powered Remote Unit

The Huawei S5751-L8P2PN2J-RUA is a revolutionary Remote Unit (RU) designed for scenarios where local power sourcing is difficult or impossible. As part of Huawei’s High-Quality Simplified Network Architecture, this unit stands out by supporting PoE-In technology, allowing the switch itself to be powered via its uplink Ethernet cable while simultaneously providing PoE+ power to connected terminals.

Specialized Interface Configuration

  • Downlink Ports: 8 x 10/100/1000Base-T Ethernet ports (PoE+ Out supported).

  • Uplink Ports: 2 x GE SFP/RJ45 ports (Supports PoE-In to power the device).

  • Management: Zero-touch deployment via Central Switch.

Core Advantages of the S5751-L8P2PN2J-RUA

1. Unique PoE-In Capability (No Local Power Needed)

The standout feature of the “PN” series is its ability to be powered by a central switch or a high-power PoE injector through the uplink cable. This eliminates the need for electrical wiring, AC outlets, or bulky power adapters at the deployment site, drastically reducing installation costs in complex environments.

2. Reliable PoE+ Forwarding

Despite being powered via PoE, the S5751-L8P2PN2J-RUA can still provide PoE+ (802.3at) power to downstream devices such as IP phones, low-power cameras, and IoT sensors. It is the perfect “repeater and distributor” for smart building networks.

3. Simplified “Zero-Config” O&M

Like all Huawei RUs, it is treated as a remote port of the central switch. There is no need for independent IP management or onsite configuration. If a unit needs replacement, it’s a simple “plug-and-play” process with automatic configuration synchronization.

4. Fanless & Industrial Reliability

The fanless, natural cooling design ensures 0dB silent operation and prevents dust accumulation. The “J” series specs ensure robust environmental adaptability, making it suitable for discreet installation in ceilings, wall-boxes, or behind furniture.

Ideal Use Cases

  • Heritage Buildings: Providing network and power without damaging walls for new electrical outlets.

  • Corridor & Ceiling Deployment: Powering security cameras and Wi-Fi APs where only Ethernet cables are available.

  • Temporary Offices & Events: Rapid setup using existing PoE infrastructure to expand port density.

Specification

Specification

Item Specification
Dimensions without packaging (H x W x D) [mm(in.)] Basic dimensions (excluding the parts protruding from the body): 43.6 mm x 195 mm x 160 mm (1.72 in. x 7.68 in. x 6.30 in.)

Maximum dimensions (the depth is the distance from ports on the front panel to the parts protruding from the rear panel): 43.6 mm x 195 mm x 166.2 mm (1.72 in. x 7.68 in. x 6.54 in.)
Dimensions with packaging (H x W x D) [mm(in.)] 116.0 mm x 285.0 mm x 300.0 mm (4.57 in. x 11.22 in. x 11.81 in.)
Chassis height [U] 1 U
Chassis material Metal
Weight without packaging [kg(lb)] 1.2 kg (2.65 lb)
Weight with packaging [kg(lb)] 2.38 kg (5.25 lb)
Typical power consumption [W] 16.74 W
Typical heat dissipation [BTU/hour] 57.13 BTU/hour
Maximum power consumption [W]
  • Without PoE: 14.60 W (device), 17.91 W (device + adapter)
  • Full PoE load: 162.05 W (PoE: 128 W)
Maximum heat dissipation [BTU/hour]
  • Without PoE: 49.82 (device), 61.11 (device + adapter)
  • Full PoE load: 552.93
Static power consumption [W] 7.15 W
MTBF [years] 83.69 years
Availability > 0.99999
Noise at normal temperature (acoustic power) [dB(A)] Noise-free (no fans), < 30
Noise at normal temperature (acoustic pressure) [dB(A)] Noise-free (no fans), < 20
Number of card slots 0
Number of power slots 0
Number of fans modules 0
Redundant power supply Not supported
Long-term operating temperature [°C(°F)] –5°C to +45°C (23°F to 113°F) at an altitude of 0 to 1800 m (0 to 5905.44 ft.)
Restriction on the operating temperature variation rate [°C(°F)] When the altitude is 1800-5000 m (5906-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (722 ft.).

Devices cannot start when the temperature is lower than 0°C (32°F).
Storage temperature [°C(°F)] –40°C to +70°C (–40°F to +158°F)
Long-term operating relative humidity [RH] 5% RH to 95% RH, non-condensing
Long-term operating altitude [m(ft.)] 0–5000 m (0–16404 ft.)
Storage altitude [m(ft.)] 0-5000 m (0-16404 ft.)
Power supply mode Power adapter
Rated input voltage [V] Power adapter input: 170 V AC to 240 V AC; 50/60 Hz

Power adapter output: 54 V DC
Input voltage range [V] Power adapter input: 170 V AC to 264 V AC; 47 Hz to 63 Hz
Maximum input current [A] 2.78 A
Memory –
Flash memory –
Console port Not supported
Eth Management port Not supported
USB Not supported
RTC Not supported
RPS input Not supported
Power supply surge protection [kV] ±4 kV in differential mode and ±4 kV in common mode
Ingress protection level (dustproof/waterproof) IP20
Types of fans None
Heat dissipation mode Natural heat dissipation
Airflow direction –
PoE Supported
Certification EMC certification

Safety certification

Manufacturing certification
FAQ

FAQ

Q: Can this switch be powered by a standard PoE switch?

A: Yes, the S5751-L8P2PN2J-RUA can be powered by a central switch supporting high-power PoE (such as PoE++ or 60W/90W PoE) to ensure enough remaining budget for the downlink ports.

Q: What happens if the PoE-In power is insufficient?

A: If the incoming power is low, the RU may limit the PoE output to its downlink ports. For maximum PoE output budget, using a high-power injector or local DC power is recommended.

Q: Is this model compatible with non-Huawei central switches?

A: While the PoE-In feature may work for basic connectivity, the management and zero-touch configuration features require a compatible Huawei Central Switch (S5731-H, S6730-H, etc.).

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Shipping & Delivery

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Shipping Ways

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Methods

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Time

Destination

DHL/FedEx/UPS/TNT

Airplane

5~7 days

Door to Door

Airway

Airplane

7~10 days

Airport

Marine

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30~45 days

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Unstable

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