Description

Huawei CloudEngine S5731S-L4P2S-RUA Remote Unit (4-Port PoE+)

Name: Huawei S5731S-L4P2S-RUA | 4-Port PoE+ Remote Unit | Dual SFP Uplink
Brand: Huawei
SKU: 98011773
Rating: 5.00 (1 reviews)

The Huawei CloudEngine S5731S-L4P2S-RUA is a compact, full-gigabit Remote Unit (RU) designed for Huawei’s Simplified Network Solution. Featuring 4 x 10/100/1000Base-T PoE+ ports and 2 x GE SFP optical uplinks, this unit provides the perfect balance of power delivery and high-reliability fiber connectivity. It is an ideal choice for high-end hotel rooms, quiet office areas, and hospital wards where localized PoE access and fiber backhaul are required.

Key Performance & Features

Efficient PoE+ Powering: All 4 downlink ports support IEEE 802.3at PoE+, providing up to 30W per port for Wi-Fi 6 Access Points, IP Phones, and smart IoT terminals.
Dual SFP Fiber Uplinks: Equipped with 2 x GE SFP ports, supporting optical fiber redundancy (MSTP/LACP) or daisy-chaining multiple RUs to save on long-distance fiber runs.
Zero-Touch O&M: Managed entirely as a remote expansion card of the central switch. No local configuration, IP management, or separate software licensing is required.
Fanless Silent Design: The natural heat dissipation system ensures 0 dB noise, making it suitable for placement in any sensitive environment without disturbing users.
Eco-Friendly Efficiency: Features ultra-low idle power consumption, supporting modern green building initiatives.

Performance

Forwarding performance: 9Mpps
Switching capacity: 12/120 Gbps

Compatibility & Accessories

Power Supply: Typically used with a 54V DC external power adapter (100V–240V AC input).
Optical Modules: Supports a wide range of Huawei certified GE SFP modules (SX Multimode / LX Singlemode / BIDI).
Central Switch Support: Compatible with Huawei CloudEngine S6730-H, S5731-H, and S12700E series.
Installation Options: Wall-mount, DIN rail, and desktop installation kits are available.

Why Choose S5731S-L4P2S-RUA?

Fiber Redundancy: The dual SFP uplinks allow for a “Dual-Homing” setup to the central switch, ensuring that the network stays online even if one fiber link is damaged.
Cable Simplification: Replaces multiple copper runs with a single fiber pair (or two for redundancy), significantly reducing the bulk of cables in wall conduits.
Low Maintenance: Since it has no fans and no local management interface, it is a “set and forget” device with an extremely low failure rate.

Specification

Item	Specification
Dimensions without packaging (H x W x D) [mm(in.)]	Basic dimensions (excluding the parts protruding from the body): 38.0 mm x 185.0 mm x 115.0 mm (1.5 in. x 7.28 in. x 4.53 in.) Maximum dimensions (the depth is the distance from ports on the front panel to the parts protruding from the rear panel): 38.0 mm x 185.0 mm x 115.0 mm (1.5 in. x 7.28 in. x 4.53 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	82.0 mm x 350.0 mm x 222.0 mm (3.23 in. x 13.78 in. x 8.74 in.)
Chassis height [U]	0.86 U
Chassis material	Metal
Weight without packaging [kg(lb)]	1.12 kg (2.47 lb)
Weight with packaging [kg(lb)]	1.46 kg (3.22 lb)
Typical power consumption [W]	6.82 W (device) 8.30 W (device + power adapter)
Typical heat dissipation [BTU/hour]	23.27 (device) 28.32 (device + power adapter)
Maximum power consumption [W]	Without PoE: 7.00 W (device)/8.48 W (device + power adapter) Full PoE load: 88.0 W (PoE: 77 W)
Maximum heat dissipation [BTU/hour]	Without PoE: 23.88 (device)/28.94 (device + power adapter) Full PoE load: 300.27
Static power consumption [W]	4.88 W
MTBF [years]	74.48 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 0-1800 m (0-5906 ft.)
Restriction on the operating temperature variation rate [°C(°F)]	When the altitude is 1800-5000 m (5905.44-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (721.78 ft.). The device cannot start when the temperature is lower than 0°C (32°F). The operating temperature of a device ranges from -5°C to +45°C (23°F to 113°F) when the device uses the following optical modules: – GE optical modules with a transmission distance of less than or equal to 10 km
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: 100–240 V AC; 50/60 Hz Power adapter output: 56 V DC
Input voltage range [V]	Power adapter input: 90–290 V AC; 47–63 Hz
Maximum input current [A]	1.6 A
Memory	–
Flash memory	–
Console port	Not supported
Eth Management port	Not supported
USB	Not supported
RTC	Not supported
RPS input	Not supported
Service port surge protection [kV]	Common mode: ±6 kV
Power supply surge protection [kV]	Power adapter: ±6 kV in differential mode and ±6 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

Reviews (1)

1 review for S5731S-L4P2S-RUA

Valera – March 16, 2026

Rated 5 out of 5
Smooth transaction.Quick air freight and the switch was packed like a tank.

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Marine	Vessel	30~45 days	Seaport
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