# 24V/12V Wall Power Distribution Board ## Description Low-voltage DC distribution board for an Australian faceplate: 24V input with fused 24V pass-through and isolated 12V/5A conversion feeding three individually protected 12V outputs in a 75 × 75 mm envelope. ## Project Details - **Owner:** beedo - **Created:** 7/13/2026 - **Last Updated:** 7/13/2026 - **Visibility:** Public - **Domain:** Power Distribution - **Implementation Details:** 2-layer PCB, single-sided assembly, through-hole power components, 75x75mm max - **Operating Temperature:** 60°C - **Operating Voltage:** 24V ## Key Components ### D1 — [WP483GDT](https://www.flux.ai/adrian95/wp483gdt.md) - Role Details: Green 3mm through-hole 24V rail indicator LED, with R1 series resistor - Part Type: LED - Forward Voltage: 2.2V - Manufacturer Name: Kingbright - Manufacturer Part Number: WP483GDT - Compliance: Green - Role: Voltage Reference - Mount: Through Hole - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP483GDT.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] ### D2 — [WP483GDT](https://www.flux.ai/adrian95/wp483gdt.md) - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP483GDT.pdf - Mount: Through Hole - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Green 3mm through-hole 12V rail indicator LED, with R2 series resistor - Role: Voltage Reference - Part Type: LED - Forward Voltage: 2.2V - Manufacturer Part Number: WP483GDT - Compliance: Green - Manufacturer Name: Kingbright **Pins:** - 1 [pin 1] - 2 [pin 2] ### D3 — [SMBJ33A-13-F](https://www.flux.ai/lcsc/smbj33a-13-f~jw2e.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-SMBJ33A-13-F_C135067.pdf - JLCPCB Part Class: Extended Part - Part Type: TVS - Role Details: SMBJ33A unidirectional TVS from fused input pre-reverse-protection node to GND; fuse is upstream so sustained surge/fault can open F1. - Manufacturer Part Number: SMBJ33A-13-F - Product Info Url: https://lcsc.com/product-detail/TVS_DIODES_SMBJ33A-13-F_SMBJ33A-13-F_C135067.html - Manufacturer Name: DIODES(美台) - Power Rating: 600W - LCSC Part Number: C135067 - Role: Clamping - Voltage Rating: 33V - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD **Pins:** - A [pin 2] - K [pin 1] ### D4 — [BZX79C12](https://www.flux.ai/adrian95/bzx79c12~k4y.md) - License: https://creativecommons.org/licenses/by/4.0/ - Voltage Rating: 12V - Role: Clamping - Datasheet URL: https://rocelec.widen.net/view/pdf/vcdswgy2ub/ONSM-S-A0003579732-1.pdf - Part Type: Diode - Manufacturer Part Number: BZX79C12 - Manufacturer Name: onsemi - Role Details: 12V zener across Q1 gate-source; cathode to Q1 source/protected 24V, anode to Q1 gate. **Pins:** - A [pin 2] - C [pin 1] ### F1 — [Fuseholder Cylinder 5x20mm](https://www.flux.ai/adrian95/fuseholder-cylinder-5x20mm~02p.md) - Role: Protection - Voltage Rating: 24V - Part Type: Fuse - Current Rating: 4A - Role Details: Series input fuse holder; fit 4A slow-blow 5x20mm fuse ahead of module and 24V output **Pins:** - P1 - P2 ### F2 — RUEF200 - Role: Protection - Package or Case Code: TO - Manufacturer Part Number: RUEF200 - Voltage Rating: 30V - Role Details: 24V OUT branch PTC; 30V class is used because 16V PTCs are unsuitable on a 24V branch - Part Type: Circuit Protection Devices - Mount: Through Hole - Manufacturer Name: TE Connectivity - Datasheet URL: https://www.littelfuse.com/assetdocs/littelfuse-ptc-radial-leaded-ruef-datasheet?assetguid=2139d828-f887-4a2a-9b25-01ddf761ab3a - Current Rating: 2A **Pins:** - IN [pin 1] - OUT [pin 2] ### F3 — 16R160B - Package or Case Code: TH - Current Rating: 1.6A - Role Details: 12V OUT 1 branch PTC, nominal 1.6A hold at 20–25C; verify derating for 60C enclosure - Manufacturer Part Number: 16R160B - Role: Protection - Datasheet URL: https://www.littelfuse.com/assetdocs/littelfuse_ptc_usbr_datasheet.pdf?assetguid=0cf7d28b-e32e-414f-894c-a3be2c972317 - Mount: Through Hole - Part Type: Circuit Protection Devices - Voltage Rating: 16V - Manufacturer Name: Littelfuse **Pins:** - IN [pin 1] - OUT [pin 2] ### F4 — 16R160B - Datasheet URL: https://www.littelfuse.com/assetdocs/littelfuse_ptc_usbr_datasheet.pdf?assetguid=0cf7d28b-e32e-414f-894c-a3be2c972317 - Manufacturer Name: Littelfuse - Voltage Rating: 16V - Part Type: Circuit Protection Devices - Mount: Through Hole - Package or Case Code: TH - Role: Protection - Manufacturer Part Number: 16R160B - Role Details: 12V OUT 2 branch PTC, nominal 1.6A hold at 20–25C; verify derating for 60C enclosure - Current Rating: 1.6A **Pins:** - IN [pin 1] - OUT [pin 2] ### F5 — 16R185B - Current Rating: 1.85A - Role: Protection - Manufacturer Part Number: 16R185B - Mount: Through Hole - Part Type: Circuit Protection Devices - Voltage Rating: 16V - Role Details: 12V OUT 3 branch PTC, closest Littelfuse USBR radial value below 2A; verify derating for 60C enclosure - Manufacturer Name: Littelfuse - Datasheet URL: https://www.littelfuse.com/assetdocs/littelfuse_ptc_usbr_datasheet.pdf?assetguid=0cf7d28b-e32e-414f-894c-a3be2c972317 - Package or Case Code: TH **Pins:** - IN [pin 1] - OUT [pin 2] ### J1 — [1803277](https://www.flux.ai/adrian95/1803277~jeu.md) - Manufacturer Name: Phoenix Contact - Connector Pitch: 3.81mm - Manufacturer Part Number: 1803277 - Datasheet URL: https://www.phoenixcontact.com/en-us/products/pcb-header-mc-15-2-g-381-1803277?type=pdf - Role Details: 24V IN Phoenix MC 3.81mm right-angle pluggable header; label +24V and 0V - License: https://creativecommons.org/licenses/by/4.0/ - Current Rating: 8A - Part Type: Connector - Connector Type: Terminal Block - Role: Input Connector **Pins:** - P1 [pin 2] - P2 [pin 1] ### J2 — [1803277](https://www.flux.ai/adrian95/1803277~jeu.md) - Current Rating: 8A - Part Type: Connector - Connector Pitch: 3.81mm - Datasheet URL: https://www.phoenixcontact.com/en-us/products/pcb-header-mc-15-2-g-381-1803277?type=pdf - Role: Output Connector - License: https://creativecommons.org/licenses/by/4.0/ - Connector Type: Terminal Block - Manufacturer Name: Phoenix Contact - Role Details: 24V OUT Phoenix MC 3.81mm right-angle pluggable header for PoE injector feed; label +24V and 0V - Manufacturer Part Number: 1803277 **Pins:** - P1 [pin 2] - P2 [pin 1] ### J3 — [1803277](https://www.flux.ai/adrian95/1803277~jeu.md) - Manufacturer Part Number: 1803277 - Connector Type: Terminal Block - Manufacturer Name: Phoenix Contact - License: https://creativecommons.org/licenses/by/4.0/ - Role: Output Connector - Datasheet URL: https://www.phoenixcontact.com/en-us/products/pcb-header-mc-15-2-g-381-1803277?type=pdf - Current Rating: 8A - Role Details: 12V OUT 1 Phoenix MC 3.81mm right-angle pluggable header; protected by 1.6A-hold PTC - Part Type: Connector - Connector Pitch: 3.81mm **Pins:** - P1 [pin 2] - P2 [pin 1] ### J4 — [1803277](https://www.flux.ai/adrian95/1803277~jeu.md) - Connector Type: Terminal Block - Part Type: Connector - Role: Output Connector - Role Details: 12V OUT 2 Phoenix MC 3.81mm right-angle pluggable header; protected by 1.6A-hold PTC - Current Rating: 8A - Datasheet URL: https://www.phoenixcontact.com/en-us/products/pcb-header-mc-15-2-g-381-1803277?type=pdf - Connector Pitch: 3.81mm - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Phoenix Contact - Manufacturer Part Number: 1803277 **Pins:** - P1 [pin 2] - P2 [pin 1] ### J5 — [1803277](https://www.flux.ai/adrian95/1803277~jeu.md) - Role Details: 12V OUT 3 Phoenix MC 3.81mm right-angle pluggable header; protected by 1.85A-hold PTC - Part Type: Connector - Connector Pitch: 3.81mm - Current Rating: 8A - Connector Type: Terminal Block - License: https://creativecommons.org/licenses/by/4.0/ - Role: Output Connector - Datasheet URL: https://www.phoenixcontact.com/en-us/products/pcb-header-mc-15-2-g-381-1803277?type=pdf - Manufacturer Part Number: 1803277 - Manufacturer Name: Phoenix Contact **Pins:** - P1 [pin 2] - P2 [pin 1] ### Q1 — [QM6015D](https://www.flux.ai/kicad-part-library/qm6015d~3yh.md) - Role: Reverse Polarity Protection - Manufacturer Part Number: QM6015D - Voltage Rating: 60V - Role Details: P-channel MOSFET ideal-diode input protection. Drain from fused input, source to protected 24V bus, gate clamped by D4 and pulled to GND by R3. - Package or Case Code: TO-252-2 - Datasheet URL: http://www.jaolen.com/images/pdf/QM6015D.pdf - Current Rating: 35A **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### U1 — SKA60B-12 - Manufacturer Name: Mean Well - Package or Case Code: Module - Part Type: Integrated Circuits - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/f466e1325544bf72a10f99bc1468d7ebc1fbb257ead294335bde8e76118f2250.pdf - Power: 60W - Manufacturer Part Number: SKA60B-12 - Mount: Through Hole - Role: DC-DC Converter - Role Details: Mean Well SKA60B-12; R.C and TRIM left NC, remote sense tied locally to output pins - Current Rating: 5A **Pins:** - -R.S [pin 4] - -Vin [pin 2] - -Vout [pin 7] - +R.S [pin 5] - +Vin [pin 3] - +Vout [pin 6] - R.C [pin 1] - TRIM [pin 8] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/beedo/24v12v-wall-power-distribution-board~hf](https://www.flux.ai/beedo/24v12v-wall-power-distribution-board~hf).* --- *Generated from [https://www.flux.ai/beedo/24v12v-wall-power-distribution-board~hf](https://www.flux.ai/beedo/24v12v-wall-power-distribution-board~hf)*