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S5751-L24P2X-RUA
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Huawei

S5751-L24P2J-RUA

S5751-L24P2J-RUA (24*10/100/1000BASE-T ports (PoE+), 2*2.5GE SFP ports, 400 W PoE, built-in AC power)

Brand

Huawei
Port

24+
Rate

GE
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SKU: 98012528 Category:
Description

Huawei S5751-L24P2J-RUA: High-Density 24-Port Gigabit PoE+ Remote Unit

The Huawei S5751-L24P2J-RUA is a high-density, high-efficiency Remote Unit (RU) engineered for Huawei’s High-Quality Simplified Network Architecture. By combining 24 Gigabit PoE+ ports into a streamlined, fanless chassis, this device brings massive power and data capabilities directly to the edge. It is the ultimate choice for high-density workspaces, call centers, and smart schools looking to simplify cabling while powering a large fleet of IP terminals.

Enterprise Interface & Power Profile

  • PoE+ Downlink Ports: 24 x 10/100/1000Base-T Ethernet ports (IEEE 802.3at/af compliant).

  • Uplink Ports: 2 x GE SFP optical slots (For clean, long-distance fiber connection to the core).

  • Management: Zero-touch centralized management via the Central Switch.

Core Advantages of the S5751-L24P2J-RUA

1. Massive 24-Port PoE+ Density

Deploying multiple small switches introduces management chaos and power clutter. The S5751-L24P2J-RUA offers 24 ports on a single edge device, allowing you to deliver up to 30W of PoE+ power per port to modern IP phones, Wi-Fi 6 access points, and security setups simultaneously.

2. Radical Savings on Office Cabling

Instead of running 24 thick, heavy copper lines from the central server room to an office cluster, you only need to deploy the S5751-L24P2J-RUA locally. Connect it back to the core using just two lightweight fiber cables. This “Fiber-to-the-Zone” layout dramatically slashes infrastructure and installation costs.

3. 0dB Absolute Silence

High port density usually means loud cooling fans. However, thanks to Huawei’s breakthrough thermal engineering, this 24-port PoE+ unit is entirely fanless. It operates in absolute silence (0dB), making it perfect for open-plan offices, schools, and library environments.

4. Plug-and-Play (Zero Configuration)

The RU acts as a remote extension card for your main switch. It requires no independent IP address or manual configuration. If a unit ever needs to be swapped out, any staff member can simply plug in the new hardware, and the central switch will instantly push the correct profile.

Central Switch Compatibility

The S5751-L24P2J-RUA must be deployed in tandem with a compatible central switch from Huawei’s simplified network ecosystem:

  • CloudEngine S5731-H Series

  • CloudEngine S6730-H Series

  • CloudEngine S12700E Series

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 442 mm x 220 mm (1.72 in. x 17.40 in. x 8.66 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 442 mm x 227 mm (1.72 in. x 17.40 in. x 8.94 in.)
Dimensions with packaging (H x W x D) [mm(in.)] 90.0 mm x 550.0 mm x 360.0 mm (3.54 in. x 21.65 in. x 14.17 in.)
Chassis height [U] 1 U
Chassis material Metal
Weight without packaging [kg(lb)] 2.79 kg (6.15 lb)
Weight with packaging [kg(lb)] 3.85 kg (8.49 lb)
Typical power consumption [W] 30.32 W
Typical heat dissipation [BTU/hour] 103.44 BTU/hour
Maximum power consumption [W]
  • Without PoE: 32.42 W
  • Full PoE load: 482.68 W (PoE: 400 W)
Maximum heat dissipation [BTU/hour]
  • Without PoE: 110.63
  • Full PoE load: 1646.95
Static power consumption [W] 15.74 W
MTBF [years] 48.88 years
Availability > 0.99999
Noise at normal temperature (acoustic power) [dB(A)] 51.4 dB(A)
Noise at normal temperature (acoustic pressure) [dB(A)] 38.8 dB(A)
Number of card slots 0
Number of power slots 0
Number of fans modules 2
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 AC built-in
Rated input voltage [V]
  • AC input: 100 V AC to 240 V AC, 50/60 Hz
  • High-voltage DC input: 240 V DC
Input voltage range [V]
  • AC input: 90 V AC to 290 V AC; 45 Hz to 65 Hz
  • High-voltage DC input: 190 V DC to 290 V DC
Maximum input current [A] 6 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] Differential mode: ±6 kV; common mode: ±6 kV
Ingress protection level (dustproof/waterproof) IP20
Types of fans Built-in
Heat dissipation mode Air cooling
Airflow direction Air intake from left and front, air exhaustion from right
PoE Supported
Certification EMC certification

Safety certification

Manufacturing certification
FAQ

FAQ

Q: Can this 24-port RU operate as a standard standalone switch?

A: No. The S5751-L24P2J-RUA is a dedicated Remote Unit designed for Huawei’s simplified network framework. It requires a compatible central switch to manage its configuration and data routing.

Q: What devices can I power with this unit?

A: It safely powers any standard IEEE 802.3af/at compliant device. This includes enterprise IP phones, desktop workspaces, network surveillance cameras, and mid-range Wi-Fi Access Points.

Q: How does the “-J” specification affect power deployment?

A: The “-J” designation ensures compliance with specific regional power standards and hardware revisions. Be sure to coordinate with our sales team to ensure the appropriate industrial external power module matches your local power grid specs.

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