What is the MikroTik CRS504-4XQ-IN?

The MikroTik CRS504-4XQ-IN is a Layer 2/3 switch that serves as an accessible entry point into the world of 100 Gigabit connectivity. It is not limited to data centers or large enterprises, but is designed to make 100G speed available in everyday configurations, offices, and research networks. Its compact design and low power consumption make it suitable for wall-mounted installations or rack cabinets with limited space.

What are the main technical features?

The key specifications of the MikroTik CRS504-4XQ-IN include:

  • Ports: 4 100 Gigabit QSFP28 ports and 1 Ethernet port for management.
  • Switching chip: Marvell Prestera 98DX4310, which supports connections from 1G to 100G.
  • CPU: QCA9531 at 650 MHz (MIPSBE architecture, 1 core).
  • Memory: 64 MB of RAM and 16 MB of Flash.
  • Operating system: RouterOS v7 with a Level 5 license.
  • Power supply: Supports PoE-in (43-57 V), DC jack (36-57 V), and 2-pin terminal (36-57 V). Includes dual hot-swap power supplies.
  • Power consumption: Maximum 25 W without connected peripherals, 41 W at maximum load.
  • Dimensions: 320 x 185 x 44 mm.
  • Operating temperature: From -40°C to +70°C.

Who is it for and in which scenarios does it make sense?

This switch is intended for network administrators, WISPs, and laboratories that need to expand existing 10 or 25 Gigabit networks to higher standards without replacing the entire infrastructure. It is particularly useful in scenarios where space is limited or where you want to reduce energy costs, such as offices, small data centers, or high-data-intensity scientific research networks. The ability to use breakout cables allows you to connect up to 16 25 Gigabit devices, offering flexibility in network configuration.

What to know before choosing it?

Before purchasing, you must verify the compatibility of cables and peripherals with the supported standards (1G, 10G, 25G, 40G, 100G). The MikroTik CRS504-4XQ-IN requires careful power supply planning, as it offers three different options (PoE-in, DC, terminal) but does not include external power supplies in the basic kit, except for the power cables. Additionally, the Level 5 RouterOS license must be sufficient for the expected routing and switching requirements.

Frequently asked questions

Does the MikroTik CRS504-4XQ-IN support PoE-in?

Yes, the MikroTik CRS504-4XQ-IN supports PoE-in power with voltages from 43 to 57 V, compatible with Passive PoE or 802.3bt Class 6 standards.

How many 100 Gigabit ports does the MikroTik CRS504-4XQ-IN have?

The MikroTik CRS504-4XQ-IN is equipped with 4 100 Gigabit QSFP28 ports, which can also be used to connect devices at lower speeds using breakout cables.

What is the maximum power consumption of the MikroTik CRS504-4XQ-IN?

The maximum power consumption of the MikroTik CRS504-4XQ-IN is 41 W with all ports active and loaded, while it is 25 W without connected peripherals.

Can the MikroTik CRS504-4XQ-IN be wall-mounted?

Yes, the MikroTik CRS504-4XQ-IN is designed for wall mounting, as well as rack mounting, thanks to the mounting ears included in the kit.

Learn more on the MikroTik website: CRS504-4XQ-IN page and official datasheet (PDF).