Lower Bay

The lower bay is the "Everything Else" area for your OmniBox.

Up to three (3) Long trays will fit in a case, or six (6) Short trays.

Lower Bay Trays may be Short or Long. A Long tray covers the mount points of two Short trays and must be mounted from side-to-side in the case. There are two dedicated lower bay trays locations and four more that can occupy an unused CPU tray bay.

Note: Tray Variants

Many of the trays listed here have variants that mount accessories such as 40mm fans or Wago 221 connectors. "Doubling up" a tray this way saves space and can shorten wiring, as well. Keep this in mind when selecting the appropriate tray variant.

Basic LM2596

ShortShort, DualLong, FanLong, DualLong, Dual, Fan

lower_bay_v1

Short

Single

General Notes

This converter requires a heat sink to safely output 3A.

Materials

Type	Part	Qty
Buck Converter	Basic LM2596	1 Ea
Printed	Lower Bay Tray - Generic LM2596 - Short Single Tray.stl	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea

lower_bay_v1

Short

Dual

General Notes

This converter requires a heat sink to safely output 3A.

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Generic LM2596 - Short Dual Tray.stl	1 Ea
Buck Converter	Basic LM2596	2 Ea
DIN 912	M3 x 6mm SHCS	8 Ea

lower_bay_v1

Long

Single

General Notes

This converter requires a heat sink to safely output 3A.

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Generic LM2596 - Long Single with Fan.stl	1 Ea
Buck Converter	Basic LM2596	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea

lower_bay_v1

Long

Dual

General Notes

This converter requires a heat sink to safely output 3A.

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Generic LM2596 - Long Dual Tray.stl	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Buck Converter	Basic LM2596	2 Ea

lower_bay_v1

Long

Dual

General Notes

This converter requires a heat sink to safely output 3A.

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Generic LM2596 - Long Dual with Fan.stl	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Buck Converter	Basic LM2596	2 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea

---

Bigtreetech Relay

lower_bay_v1

Short

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - BIGTREETECH Relay 1.2.stl	1 Ea
Other Electrical	Bigtreetech Relay 1.2	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea

---

Bigtreetech U2C CAN Adapter

lower_bay_v1

edgy

General Notes

• Socket head screws are too large for the terminals.
• See the Printables page for more details.

Materials

Type	Part	Qty
Printed	OmniBox Lower Bay Short Tray for BTT U2C (Printables)	1 Ea
DIN 912	M3 x 6mm SHCS	4 Ea
Other Electrical	Bigtreetech U2C CAN Adapter	1 Ea
DIN 7380	M3 x 6mm BHCS	4 Ea

---

Bigtreetech UPS 24V

Fit Test Pending: See Issue #24

lower_bay_v1

General Notes

(None)

Materials

Type	Part	Qty
Printed	Bigtreetech UPS 24V	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Other Electrical	Bigtreetech UPS 24V	1 Ea

---

Creality MOSFET

ShortShort, HSILongLong, HSI

lower_bay_v1

Short

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Creality MOSFET - Short.stl	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea
Other Electrical	Creality MOSFET	1 Ea

lower_bay_v1

Short

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Creality MOSFET - Short HSI.stl	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea
Other Fasteners	M3 x 5mm OD x 4mm L Insert	2 Ea
Other Electrical	Creality MOSFET	1 Ea

lower_bay_v1

Long

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Creality MOSFET - Long.stl	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea
Other Electrical	Creality MOSFET	1 Ea

lower_bay_v1

Long

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - Creality MOSFET - Long HSI.stl	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea
Other Fasteners	M3 x 5mm OD x 4mm L Insert	2 Ea
Other Electrical	Creality MOSFET	1 Ea

---

DROK 3A LM2596

ShortLong, DualLong, Dual, Fan

lower_bay_v1

Short

single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - DROK 3A LM2596 - Short Single Tray.stl	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Buck Converter	DROK 3A LM2596 with LED	1 Ea

lower_bay_v1

Long

Dual

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - DROK 3A LM2596 - Long Dual Tray.stl	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Buck Converter	DROK 3A LM2596 with LED	1 Ea

lower_bay_v1

Long

Dual

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - DROK 3A LM2596 - Long Single with Fan.stl	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea
Buck Converter	DROK 3A LM2596 with LED	1 Ea

---

DROK 5A Buck Converter

LongLong, Wago

lower_bay_v1

Long

Single

General Notes

The hole pattern for this part is 63mm x 40.5mm.

Materials

Type	Part	Qty
Printed	Lower Bay - DROK 5A Buck with LED.stl	1 Ea
Buck Converter	DROK 5A Buck with LED	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea

lower_bay_v1

Long

Single

General Notes

The hole pattern for this part is 63mm x 40.5mm.

Materials

Type	Part	Qty
Printed	Lower Bay - DROK 5A Buck with LED - Dual Wago.stl	1 Ea
Electrical Connector	Wago 221-413 3-Position Lever Nut	2 Ea
Buck Converter	DROK 5A Buck with LED	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea

---

DROK LM2596 with LED

ShortLong, FanLong, DualLong, Dual, Fan

lower_bay_v1

Short

Single

General Notes

The hole pattern for this part is 60.5mm x 30.5mm.

Materials

Type	Part	Qty
Buck Converter	DROK 3A LM2596 with LED	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Printed	Lower Bay Tray - DROK 3A LM2596 - Short Single Tray.stl	1 Ea

lower_bay_v1

Long

Single

General Notes

The hole pattern for this part is 60.5mm x 30.5mm.

Materials

Type	Part	Qty
Buck Converter	DROK 3A LM2596 with LED	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea
Printed	Lower Bay Tray - DROK LM2596 - Long Single with Fan.stl	1 Ea

lower_bay_v1

Long

Dual

General Notes

The hole pattern for this part is 60.5mm x 30.5mm.

Materials

Type	Part	Qty
Buck Converter	DROK 3A LM2596 with LED	2 Ea
DIN 912	M3 x 6mm SHCS	12 Ea
Printed	Lower Bay Tray - DROK LM2596 - Long Dual.stl	1 Ea

lower_bay_v1

Long

Dual

General Notes

The hole pattern for this part is 60.5mm x 30.5mm.

Materials

Type	Part	Qty
Buck Converter	DROK 3A LM2596 with LED	2 Ea
DIN 912	M3 x 6mm SHCS	12 Ea
Printed	Lower Bay Tray - DROK LM2596 - Long Dual with Fan.stl	1 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea

---

Fotek SSR-40 DA

ShortLong

lower_bay_v1

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay - SSR-40 DA - Short.stl	1 Ea
DIN 912	M3 x 6mm SHCS	4 Ea
Other Electrical	Fotek SSR-40 DA	1 Ea
DIN 912	M4 x 6mm SHCS	2 Ea

lower_bay_v1

Long

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay - SSR-40 DA - Long.stl	1 Ea
DIN 912	M3 x 6mm SHCS	4 Ea
Other Electrical	Fotek SSR-40 DA	1 Ea
DIN 912	M4 x 6mm SHCS	2 Ea

---

HiLetGo LM2596 with LED

ShortLong, FanLong, DualLong, Dual, Fan

lower_bay_v1

Short

Single

General Notes

The hole pattern for this part is 49.5mm x 27.5mm.

Materials

Type	Part	Qty
Printed	Lower Bay Tray - HiLetGo LM2596 - Short Single.stl	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Buck Converter	HiLetGo 2A LM2596 with LED	1 Ea

lower_bay_v1

Long

Single

General Notes

The hole pattern for this part is 49.5mm x 27.5mm.

Materials

Type	Part	Qty
Printed	Lower Bay Tray - HiLetGo LM2596 - Long Single with Fan.stl	1 Ea
DIN 912	M3 x 6mm SHCS	8 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea
Buck Converter	HiLetGo 2A LM2596 with LED	1 Ea

lower_bay_v1

Long

Dual

General Notes

The hole pattern for this part is 49.5mm x 27.5mm.

Materials

Type	Part	Qty
Buck Converter	HiLetGo 2A LM2596 with LED	2 Ea
DIN 912	M3 x 6mm SHCS	12 Ea
Printed	Lower Bay Tray - HiLetGo LM2596 - Long Dual.stl	1 Ea

lower_bay_v1

Long

Dual

General Notes

The hole pattern for this part is 49.5mm x 27.5mm.

Materials

Type	Part	Qty
Buck Converter	HiLetGo 2A LM2596 with LED	2 Ea
DIN 912	M3 x 6mm SHCS	12 Ea
Printed	Lower Bay Tray - HiLetGo LM2596 - Long Dual with Fan.stl	1 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea

---

Lower Bay 40mm Fan

lower_bay_v1

Short

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - 40mm Fan.stl	1 Ea
Fan	40mm x 10mm Axial Fan	1 Ea
DIN 912	M3 x 15mm SHCS	4 Ea
DIN 912	M3 x 6mm SHCS	4 Ea

---

Omron G3NA/G3A SSR

LongShort

lower_bay_v1

Long

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - 48mm SRR - Long Tray.stl	1 Ea
Other Electrical	Omron G3NA/G3A Solid State Relay	1 Ea
DIN 912	M4 x 6mm SHCS	2 Ea
DIN 912	M3 x 6mm SHCS	4 Ea

lower_bay_v1

Short

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - 48mm SRR - Short Tray.stl	1 Ea
Other Electrical	Omron G3NA/G3A Solid State Relay	1 Ea
DIN 912	M4 x 6mm SHCS	2 Ea
DIN 912	M3 x 6mm SHCS	4 Ea

---

SSLHONG 5V/3A Buck with USB C

ShortShort, HSILong, WagoLong, Wago, HSI

lower_bay_v1

Short

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - SSLHONG Buck - Short - Stock.stl	1 Ea
Buck Converter	SSLHONG 5V/3A Buck with USB C	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea

lower_bay_v1

Short

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - SSLHONG Buck - Short - HSI.stl	1 Ea
Other Fasteners	M3 x 5mm OD x 4mm L Insert	2 Ea
Buck Converter	SSLHONG 5V/3A Buck with USB C	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea

lower_bay_v1

Long

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - SSLHONG Buck - Long - Stock.stl	1 Ea
Electrical Connector	Wago 221-415 5-Position Lever Nut	2 Ea
Buck Converter	SSLHONG 5V/3A Buck with USB C	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea

lower_bay_v1

Long

Single

General Notes

(None)

Materials

Type	Part	Qty
Printed	Lower Bay Tray - SSLHONG Buck - Long - HSI.stl	1 Ea
Electrical Connector	Wago 221-415 5-Position Lever Nut	2 Ea
Other Fasteners	M3 x 5mm OD x 4mm L Insert	2 Ea
Buck Converter	SSLHONG 5V/3A Buck with USB C	1 Ea
DIN 912	M3 x 6mm SHCS	6 Ea

---

Wago 221 Series Lever Nuts

4x 3 Pos4x 5 Pos, 2x 3 Pos4x 5 Pos8x 3 Pos

lower_bay_v1

Short

General Notes

(None)

Materials

Type	Part	Qty
Electrical Connector	Wago 221-413 3-Position Lever Nut	4 Ea
Printed	Lower Bay Tray - Wago Nuts - 3Px4.stl	None Ea
DIN 912	M3 x 6mm SHCS	4 Ea

lower_bay_v1

Long

General Notes

(None)

Materials

Type	Part	Qty
Electrical Connector	Wago 221-413 3-Position Lever Nut	2 Ea
Electrical Connector	Wago 221-415 5-Position Lever Nut	4 Ea
Printed	Lower Bay Tray - Wago Nuts - 5Px4, 3Px2.stl	1 Ea
DIN 912	M3 x 6mm SHCS	4 Ea

lower_bay_v1

Long

General Notes

(None)

Materials

Type	Part	Qty
Electrical Connector	Wago 221-415 5-Position Lever Nut	4 Ea
Printed	Lower Bay Tray - Wago Nuts - 5Px4.stl	1 Ea
DIN 912	M3 x 6mm SHCS	4 Ea

lower_bay_v1

Long

General Notes

(None)

Materials

Type	Part	Qty
Electrical Connector	Wago 221-413 3-Position Lever Nut	8 Ea
Printed	Lower Bay Tray - Wago Nuts - 8x3P.stl	1 Ea
DIN 912	M3 x 6mm SHCS	4 Ea

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