Lower Bay Components
Lower Bay Trays mount below the MCU board and are used for a wide range of parts. Parts compatible with the lower bay are listed here. The /Trays/Lower Bay git folder is organized with subfolders for each supported part. All variations based around that part are in the same folder.
There are two types of Lower Bay Trays: Short and Long. A Long length tray covers the mount points of two Short trays and must be mounted from the front to the back of the case.
Every tray (short or long) attaches to the Core case body with four (4) M3 x 6mm screws. Additional fasteners are listed with each component.
Buck Converters
Long trays for buck converters often have a 40mm fan mount. This is particularly useful for 2A buck converters that are rated to 3A with cooling.
Powering a Raspberry Pi
The Raspberry Pi 4B requires up to 3A of power, but typically uses less than 2.5A. The LM2596 is rated to 2A of current without cooling; adding a heatsink or modest airflow allows it power a Raspberry Pi without issue.
Basic 2A LM2596
DROK 2A LM2596 with LED
- Materials: 4x M3 x 6mm
- Hole Pattern: 60.5mm x 30.5mm
- Tray:
- Short (single)
- Long (single, dual)
HiLetGo 2A LM2596 with LED
- Materials: 4x M3 x 6mm
- Hole Pattern: 49.5mm x 27.5mm
- Trays:
- Short (single)
- Long (single, dual)
DROK 3A LM2596 with LED
- Materials: 4x M3 x 6mm
- Hole Pattern: 52.5mm x 28.75mm
- Trays:
- Short (single)
DROK 5A Buck with LED
- Materials: 4x M3 x 6mm
- Hole Pattern: 63mm x 40.5mm
- Trays:
- Long (single)
MOSFETs
Creality MOSFET
Solid State Relays
Omron G3A/G3NA Puck Relays
Fit Test Pending
- Materials: 2x M4 x 6mm
- Trays:
- Short (single)
- Long (single)
- Notes:
- Mounting holes distance is 47.5mm to about 52mm.
- Long tray has zip tie anchors.
Fotek SSR-40 DA
- Materials: 2x M4 x 6mm
- Trays:
- Short (single)
- Long (single)
- Notes:
- Mounting holes distance is 47mm to about 52mm.
- Long tray has zip tie anchors.
Other Products
BIGTREETECH UPS 24V 1.0
BIGTREETECH Relay 1.2
Wago 221 Lever Nuts
- Notes:
- Support for 3 position & 5 position
- No mounting hardware; snap-in
- Trays:
- Short, 4x 3 position
- Long, 4x 5 position
- Long, 4x 5 position, 2x 3 position
4010/4020 Fans
- Materials: 4x M3
- Notes:
- Screw length depends on mounting direction and thickness of the fan.
- Also available on long trays for buck converters.
- Trays:
- Short (single)
