Cooler Master MasterBox MB520 fits ATX with Side Window Red (MCB-B520-KANN-S00)

est. delivery in 2-4 days
Key Specifications
  • fits up to ATX motherboards

  • Max CPU cooler height: 165mm

  • 2 x 3.5" / 2.5"

  • up to 360mm radiator

Color: Red

SKU:#039714 Warranty2 years by Cooler Master Product No.:MCB-B520-KANN-S00 Short link: See specifications from the manufacturer

DARKMIRROR FRONT PANEL Shade light through a transparent, tinted front panel. EXCELLENT THERMAL PERFORMANCE Optimized airflow due to the large intakes on each side of the front panel. Additional ventilation on the top panel adds thermal support. AGGRESSIVE INTAKES Large intakes on each side of the front panel let the system breathe easy. EDGE TO EDGE TRANSPARENT SIDE PANEL Showcase your build through the transparent side panel. FAN AND RADIATOR SUPPORT Front: Three 120mm or two 140mm fans and up to a 360mm radiator with a maximum thickness of 50mm without fans. Top: Two 120mm or two 140mm fans and supports a 120mm or a 240mm radiator. Rear: One 120mm fan or radiator. All to ensure you don't have to compromise on performance. EXPANDING THE POSSIBILITIES The spacious interior fits all standard motherboards for your gaming needs. MAIN COMPONENTS CLEARANCE The MasterBox MB520 case supports CPU coolers up to a height of 165mm, graphic cards up to a length of 410mm and power supplies up to a length of 180mm.


2 years by Cooler Master


Form factorMidi Tower
MaterialPlastic, Steel
Product colourBlack, Red
Supported motherboard form factorsATX, micro ATX, Mini-ITX
Number of 3.5" bays2
Side windowY
Number of 2.5" bays4
Number of expansion slots7
Suitable forGaming
Tempered glass panel(s)Y
Anti-dust filterY
Cable managementY
Reset buttonY
On/off buttonY
LED indicatorsY
Maximum CPU cooler height16.5 cm
Maximum graphics card length41 cm
Maximum PSU length18 cm

Power supply

Power supply includedN
Power supply locationBottom
Supported power supply form factorsATX

Ports & interfaces

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
Audio inputY
Audio outputY


Number of front fans supported (max)3
Front fans diameters supported120,140 mm
Rear fans installed1x 120 mm
Number of rear fans supported (max)1
Rear fans diameters supported120 mm
Number of top fans supported (max)2
Top fans diameters supported120,140 mm
Liquid cooling capabilityY
Front radiator fan sizes supported120,140,240,280,360 mm
Rear radiator fan sizes supported120 mm
Top radiator fan sizes supported120,240 mm


Supported HDD sizes2.5,3.5"
HDD/SSD combo cageY

Weight & dimensions

Width217 mm
Depth496 mm
Height468 mm
Weight5.34 kg

Packaging data

Package width276 mm
Package depth523 mm
Package height568 mm
Package weight6.54 kg