S5755-S48U8Y POE ethernet switch with 8*25GE SFP28 ports

Chassis material

Metal

Height [mm]

43.6 mm

Depth [mm]

420.0 mm

Wide [mm]

442.0 mm

Chassis height [U]

1

Weight with packaging [kg(lb)]

7.98 kg (17.59 lb)

Weight without packaging [kg(lb)]

5.57 kg (12.28 lb)

Maximum power consumption [W]

- 100% traffic under the ATIS standard, dual power modules, and without PoE: - 74 W (all ports used) - Full PoE load, three 1000 W power modules: 3171 W (PoE: 2880 W)

Typical power consumption [W]

30% traffic under the ATIS standard, dual power modules: - 72 W (all ports used)

Heat dissipation mode

Air cooling for heat dissipation, intelligent fan speed adjustment

Maximum heat dissipation [BTU/hour]

- 100% traffic under the ATIS standard, dual power modules, and without PoE: - 252.49 (all ports used) - Full PoE load, three 1000 W power modules: 10819.63

Typical heat dissipation [BTU/hour]

30% traffic under the ATIS standard, dual power modules: - 245.67 (all ports used)

Power supply mode

Pluggable power supply

Input voltage range [V]

- AC input: 90 V AC to 290 V AC; 45 Hz to 66 Hz - High-voltage DC input: 190 V DC to 290 V DC - DC input: -38.4 V DC to -72 V DC

Rated input voltage [V]

- AC input: 100 V AC to 130 V AC, 200 V AC to 240 V AC; 50/60 Hz - High-voltage DC input: 240 V DC - DC input: –48 V DC to –60 V DC

Maximum input current [A]

The current specifications are related to the pluggable power module. For details, see Pluggable Power Modules.

Number of power slots

3

Memory

4 GB

Flash memory

Physical space: 1 GB

Redundant power supply

1+1+1 Pluggable AC and DC power modules can be used together in the same switch.

Types of fans

Built-in

Noise at normal temperature (acoustic power) [dB(A)]

30% PoE load: 52.20 dBA

Noise at normal temperature (acoustic pressure) [dB(A)]

30% PoE load: 38.5 dBA

Airflow direction

Air intake from front and right and air exhaust from rear

Storage temperature [°C(°F)]

–40°C to +70°C (–40°F to +158°F)

Short-term operating temperature [°C(°F)]

-5°C to +50°C (23°F to 122°F) at an altitude of 0-1800 m (0-5905.44 ft.)

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.). The device can work for a short period of time when the operating temperature is beyond the normal range, but the following conditions must be met: - The operating temperature exceeds 45°C (113°F) for a maximum of 96 consecutive hours in a year. - The total time when the operating temperature exceeds 45°C (113°F) in a year is less than or equal to 360 hours. - The number of times the operating temperature exceeds 45°C (113°F) is less than or equal to 15 in one year. If any of the preceding conditions is not met, the device may be damaged or an unknown error may occur. Devices cannot start when the temperature is lower than 0°C (32°F). The maximum transmission distance of an optical module used for short-term operation at 50°C (122°F) cannot exceed 10 km.

Long-term operating relative humidity [RH]

5% RH to 95% RH, non-condensing

Storage altitude [m(ft.)]

0-5000 m (0-16404 ft.)

Long-term operating altitude [m(ft.)]

0–5000 m (0–16404 ft.)

MTBF [year]

83.43

MTTR [hour]

2

Availability

> 0.99999

Maximum number of physical ports on the entire device

56

Maximum number of 25GE ports

8

Maximum number of 10GE ports

8

Maximum number of GE ports

56

Maximum number of FE ports

48

USB

Supported

Console port

RJ45

Eth Management port

RJ45

Power supply surge protection

- Configured with AC power modules: ±6 kV in differential mode and ±6 kV in common mode - Configured with DC power modules: ±2 kV in differential mode and ±4 kV in common mode

RPS input

Not supported

PoE

Supported