Cooler Master MasterBox 520 Mesh Midi PC Case Black MB520-KGNN-S00
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Description
Description
Cooler Master MasterBox 520 Mesh Midi PC Case Black MB520-KGNN-S00
Cooler Master MasterBox 520 Mesh Mid-Tower PC Case – Black

The Cooler Master MasterBox 520 Mesh is a black mid-tower PC case designed for gaming, performance and enthusiast desktop builds. Its FineMesh front panel, three pre-installed CF120 ARGB fans and flexible radiator support help builders create an effective cooling layout. A tempered-glass side panel, removable top panel and spacious internal clearances also make component installation and future upgrades more accessible.
FineMesh Performance Front Panel
The FineMesh front panel uses large ventilation openings to promote airflow into the chassis while providing a clear view of the three illuminated front fans. Front, top and bottom dust filters help reduce the amount of dust entering the system and can be removed for cleaning.

Three CF120 ARGB Fans Included
Three 120 mm CF120 ARGB fans are pre-installed behind the mesh front panel, providing immediate intake airflow and customisable lighting. An included ARGB and fan hub helps organise connections, manage the lighting system and provides four additional fan headers for compatible cooling equipment.
Removable Top Panel
The entire top panel can be removed to improve access during assembly. This makes it easier to install fans, route cables and mount compatible liquid-cooling radiators before securing the panel back onto the chassis.

Flexible Air and Liquid Cooling
The MasterBox 520 Mesh supports up to seven 120 mm fans across the front, top and rear positions. Builders can install radiators up to 360 mm at the front or top, with a 120 mm radiator position available at the rear. Actual simultaneous radiator and component compatibility depends on radiator thickness, motherboard components, memory and other installed hardware.
Tool-Free Tempered-Glass Side Panel
The tempered-glass left side panel is secured with pins, allowing it to be removed without conventional side-panel screws. This provides convenient access to the system while giving installed components and ARGB lighting a clear showcase.

Room for Performance Hardware
The chassis supports Mini-ITX, Micro-ATX and ATX motherboards, together with SSI-CEB and E-ATX boards measuring up to 12 × 10.7 inches. Internal clearance accommodates graphics cards up to 410 mm long and CPU coolers up to 165 mm high, providing space for a wide selection of gaming and workstation components.
Flexible Storage and Power-Supply Installation
Two 3.5-inch drive bays and three dedicated 2.5-inch drive bays provide storage options for hard drives and solid-state drives. The removable HDD cage can be repositioned or removed to improve assembly access, cable routing or power-supply space. The ventilated PSU shroud supports a bottom-mounted ATX power supply.
Convenient Front Connectivity
The front I/O panel includes a USB 3.2 Gen 2 Type-C port, a USB 3.2 Gen 1 Type-A port and a combined 3.5 mm headset connection. A reset and ARGB control button provides convenient access to compatible lighting controls.

Features:
- FineMesh front panel promotes airflow while showcasing the illuminated front fans.
- Three pre-installed 120 mm CF120 ARGB intake fans provide cooling and customisable lighting from the start.
- Included ARGB and fan hub helps organise lighting and fan connections.
- Removable top panel improves access when fitting fans and liquid-cooling radiators.
- Tool-free tempered-glass side panel provides convenient access and a clear view of installed components.
- Supports up to seven 120 mm fans and radiators up to 360 mm at the front and top.
- Accommodates graphics cards up to 410 mm long and CPU coolers up to 165 mm high.
Technical Specifications:
| Specification | Details |
|---|---|
| Brand | Cooler Master |
| Model | MasterBox 520 Mesh |
| Manufacturer Part Number | MB520-KGNN-S00 |
| Product Type | Mid-tower desktop PC case |
| Colour | Black |
| Exterior Materials | Mesh, steel, ABS plastic and tempered glass |
| Left Side Panel | Tool-free tempered glass |
| Motherboard Support | Mini-ITX, Micro-ATX, ATX, SSI-CEB and E-ATX up to 12 × 10.7 inches |
| Back-Connector Motherboard Support | No |
| Expansion Slots | 7 |
| 3.5-inch Drive Bays | 2 |
| 2.5-inch Drive Bays | 3 |
| Front USB Ports | 1 × USB 3.2 Gen 2 Type-C and 1 × USB 3.2 Gen 1 Type-A |
| Front Audio | 1 × combined 3.5 mm headset connection for audio and microphone |
| Front Controls | Power button and reset/ARGB button |
| Included Controller | ARGB and fan hub |
| Pre-Installed Front Fans | 3 × 120 mm CF120 ARGB fans |
| Pre-Installed Top Fans | None |
| Pre-Installed Rear Fan | None |
| Front Fan Support | Up to 3 × 120 mm or 2 × 140 mm |
| Top Fan Support | Up to 3 × 120 mm or 2 × 140 mm |
| Rear Fan Support | 1 × 120 mm |
| Front Radiator Support | 120, 140, 240, 280 or 360 mm |
| Top Radiator Support | 120, 140, 240, 280 or 360 mm; recommended maximum thickness of 55 mm |
| Rear Radiator Support | 120 mm |
| Maximum Graphics Card Length | 410 mm |
| Maximum CPU Cooler Height | 165 mm |
| Maximum PSU Length | 200 mm; up to 170 mm recommended |
| Power Supply Support | Bottom-mounted ATX power supply |
| Dust Filters | Front, top and bottom |
| Dimensions Including Protrusions | 499 × 210 × 498 mm |
| Chassis Body Dimensions | 430 × 210 × 479 mm |
| Warranty | 2 years, subject to Cooler Master’s regional warranty terms |
Build a well-ventilated and easy-to-upgrade gaming system with the Cooler Master MasterBox 520 Mesh, and add it to your cart today.
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