4 layers150.2 × 105 mm Alexandria ng, the printed circuit board in 3D

Alexandria ng

Free and open source networking devices

Size: 150.2 × 105 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 91
Nets: 188
Pads: 581
Tracks, vias: 2,007, 311
Pours: 8
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 27 Jun 2022
Updated: 26 May 2025

Overview

Alexandria ng is an open-source printed circuit board by bence98, from the bence98/LibreEther repository on GitHub. It is a 4-layer board of 150.2 × 105 mm with 91 parts on 188 nets, routed with 2,007 tracks and 311 vias.

It is built around the RTL8367S-CG, 30F-51NL and M2.5. Its parts include 53 resistors, 14 connectors, 5 diodes, 4 capacitors and 1 IC.

Main components

README

README.md

LibreEther

Free and open source networking devices

Parts

Qty	Value	Footprint	References
22	0	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R27, R28, R29, R30, R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, R41, R42 +6
18	4k7	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R3, R5, R6, R7, R10, R11, R12, R13, R14, R15, R16, R47, R48, R50, R51, R52 +2
12	1k	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R2, R4, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26
5	30F-51NL	Transformer_SMD:Transformer_Ethernet_YDS_30F-51NL_SO-24_7.1x15.1mm	TR1, TR2, TR3, TR4, TR5
4	M2.5	MountingHole:MountingHole_2.7mm_M2.5_ISO7380_Pad	H1, H2, H3, H4
3	LED	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D3, D4, D5
2	10u	Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C1, C2
2	22p	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C3, C4
1	+3.3V	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J13
1	25M	Crystal:Crystal_SMD_5032-4Pin_5.0x3.2mm	Y1
1	2k49±1%	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R1
1	2u2	Inductor_SMD:L_Ferrocore_DLG-0504	L1
1	Eth0	Connector_RJ:RJ45_Amphenol_RJHSE538X	J1
1	Eth1	Connector_RJ:RJ45_Amphenol_RJHSE538X	J2
1	Eth2	Connector_RJ:RJ45_Amphenol_RJHSE538X	J3
1	Eth3	Connector_RJ:RJ45_Amphenol_RJHSE538X	J4
1	Eth4	Connector_RJ:RJ45_Amphenol_RJHSE538X	J5
1	FFC	Connector_FFC-FPC:Jushuo_AFC07-S24FCA-00_1x24-1MP_P0.50_Horizontal	J12
1	IRQ	TestPoint:TestPoint_Pad_D1.0mm	TP1
1	I²C	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J14
1	LED_G	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D1
1	PoE0	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J7
1	PoE1	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J8
1	PoE2	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J9
1	PoE3	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J10
1	PoE4	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J11
1	Polyfuse	Fuse:Fuse_0603_1608Metric_Pad1.05x0.95mm_HandSolder	F1
1	RST	Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm	SW1
1	RTL8367S-CG	Package_QFP:LQFP-128_14x14mm_P0.4mm	U1
1	SFP+	Connector:Connector_SFP_and_Cage	J6
1	ZMM5227B-PEC	Diode_SMD:D_MiniMELF_Handsoldering	D2

Questions

How big is the Alexandria ng PCB?

It measures 150.2 × 105 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Alexandria ng use?

91 parts, built around the RTL8367S-CG, 30F-51NL and M2.5. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Alexandria ng KiCad files?

From the bence98/LibreEther repository on GitHub, at the commit this page was made from: the board is Alexandria-ng/Alexandria-ng.kicad_pcb and its schematic Alexandria-ng/Alexandria-ng.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Alexandria ng design in my own project?

Its repository states no licence, so its author keeps all rights: ask bence98 before reusing the design.

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/bence98-libreether" title="Alexandria ng in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/bence98-libreether.jpg" alt="Alexandria ng" width="1200" height="900">

A picture that opens the board, for a README

[![Alexandria ng](https://pcbkit.io/embed/boards/bence98-libreether.jpg?size=s)](https://pcbkit.io/boards/bence98-libreether)

Source

Repository: bence98/LibreEther
Board file: Alexandria-ng/Alexandria-ng.kicad_pcb
Commit: cd24af8
Licence: Not stated

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