MikroTik Gigabit Ethernet Smart Switch CRS112-8P-4S-IN - PoE-out

Our review of the MikroTik CRS112-8P-4S-IN finds it well suited for small offices, home labs, and edge networking where a compact PoE-capable switch with flexible uplink options is needed. The bottom line: this unit is a practical combination of a Gigabit switch and RouterOS L5 functionality that delivers reliable performance and multiple PoE modes, making it an attractive choice for users who need to power access points or cameras while keeping fiber uplinks available. It is not aimed at plug-and-play consumers who want a purely managed GUI experience without RouterOS learning.

Key Features

• Eight Gigabit RJ45 ports with PoE-out: Provides power and data to a range of 802.3af/at and passive PoE devices so access points and cameras can be powered directly from the switch.
• Four SFP fiber uplinks: Offers optical connectivity up to 1 Gbps for long-distance uplinks or aggregation without using copper ports.
• Flexible power input options: Secondary DC jack accepts 48-57 V to enable full 802.3af/at power delivery when using an appropriate power supply.
• Autosensing PoE modes: Automatically detects and supplies the correct PoE type to connected devices, reducing manual configuration and compatibility worries.
• Per-port current behavior: Limits per-port current automatically based on input voltage, which helps prevent overloads and manages overall power budget efficiently.
• RouterOS L5: Includes MikroTik RouterOS level 5 features for advanced routing and management when more control is needed in a compact switch chassis.

Who It's For

The CRS112-8P-4S-IN is best for small to medium offices, tech-savvy home users, and installers who need a compact switch that can both power devices and provide fiber uplinks. Network administrators who use RouterOS will appreciate the extra management flexibility and the ability to integrate switching and routing features in one box.

It is less suitable for users who expect a consumer-style, fully graphical management console out of the box or who need very high PoE budgets beyond the stated total limits. Buyers who require included high-voltage power supplies should plan to purchase the appropriate 48-57 V adapter separately.

Pros & Cons

Pros

• Solid build and reliable performance noted by customers, making it a dependable office or lab switch.
• Multiple PoE modes and autosensing improve compatibility with a wide range of devices without manual intervention.
• Four SFP ports give flexible fiber uplink options up to 1 Gbps, ideal for mixes of copper and fiber links.
• RouterOS L5 adds advanced routing and management features in a single compact unit.

Cons

• Power supply is not included; buyers must obtain a 48-57 V adapter separately to enable full 802.3af/at capability.
• Total PoE budget is limited (2.8A@24V or 1.4A@48-57V), which may restrict how many high-draw devices can be powered simultaneously.

Specifications

Model	CRS112-8P-4S-IN
Ports	8 Gigabit RJ45 with PoE-out, 4 SFP ports
PoE Support	Autosensing 802.3af/at PoE/PoE+ and Passive PoE
Secondary Power	DC jack supports 48-57 V input (power supply sold separately)
Per-Port Current	Max 1 A per port at 18-28 V; 450 mA per port at 48-57 V
Total PoE Limit	2.8A at 24 V; 1.4A at 48-57 V
Software	RouterOS Level 5

Our Verdict

The MikroTik CRS112-8P-4S-IN is a compact, well-built hybrid switch that delivers practical PoE flexibility and fiber uplinks with the power of RouterOS. It is a good value for small networks and tech-savvy installers who need reliable performance and managed features in one box, provided they account for the separate power supply and total PoE budget limits.

Frequently Asked Questions

Does the switch include a power supply?
The unit does not include a 48-57 V power supply; a compatible adapter must be purchased separately to enable full 802.3af/at output.

Can it power 802.3af/at devices?
Yes, the switch can power 802.3af/at devices when supplied with 48-57 V DC input and it will auto-detect the correct PoE mode.

What uplink speeds do the SFP ports support?
The four SFP ports support optical fiber uplinks up to 1 Gbps per port for aggregation or long-distance links.