2 layers
6 layers75 × 75 mm
Ossm flagship
openvalence/HardwareThe OSSM Flagship PCB (ESP32-P4 + ESP32-C6) and everything physical around it. KiCad, CERN-OHL-S.
- Size
- 75 × 75 mm
- Copper layers
- 6
- Thickness
- 1.65 mm
- Parts
- 298
- Nets
- 211
- Pads
- 999
- Tracks, vias
- 842, 859
- Pours
- 29
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 22 Sep 2026
- Updated
- 1 Nov 2026
Overview
Ossm flagship is an open-source printed circuit board by openvalence, from the openvalence/Hardware repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 6-layer board of 75 × 75 mm with 298 parts on 211 nets, routed with 842 tracks and 859 vias.
It is built around the BSC040N10NS5, PESD3V3S2UT and PWR263S-35-15R0JE, with the BZT52C15, MMBT3904 and SMA6J48CA among its other parts. Its parts include 115 resistors, 76 capacitors, 10 transistors, 7 diodes and 6 fuses.
Main components
6
BSC040N10NS5
TDSON-8-EP(5.1x5.9)-55℃~+150℃ 1 N-channel 100V 139W 3.8V 49pF 4mΩ@10V 5.3nF 72nC@10V 86A TDSON-8(5x6) MOSFETs ROHSInfineon TechnologiesMOSFETs
PESD3V3S2UT
SOT-2318A 2 207pF 20V 2uA 3.3V 330W@8/20us 5.2V ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)PWR263S-35-15R0JE
D2PAKChip Resistor - Surface MountBourns
BZT52C15
SOD-123-65℃~+150℃ 1 Independent 100nA@1V 13.8V~15.6V 15V 200Ω 30Ω 370mW SOD-123 Zener Diodes ROHSDiodes IncorporatedZener DiodesMMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
SMA6J48CA
SMA(DO-214AC)-65℃~+150℃ 1uA 48V 53.3V 600W@10/1000us 77.4V 8.1A IEC 61000-4-2 TVS SMA(DO-214AC) ESD and Surge Protection (TVS/ESD) ROHSLittelfuseESD And Surge Protection (TVS/ESD)
README
README.mdHardware
Hardware for the Valence ecosystem: the OSSM Flagship controller board (ESP32-P4 + ESP32-C6, runs Nucleus), and everything physical around it: harnesses, panels, enclosure parts, bench fixtures, and the reference wiring for the drive.
Design tool: KiCad (native text formats, diffable). Vendor datasheets and
manuals live under reference/ and are not tracked (see .gitignore); the
board documents what it needs from them.
Layout
| Path | What |
|---|---|
flagship/ | The OSSM Flagship board: KiCad project, fabrication outputs, BOM |
harness/ | Cable and connector drawings (JST-XH pinouts, RS485, quadrature) |
enclosure/ | Mechanical: enclosure and mounting |
bench/ | Fixtures and jigs used to test boards |
reference/ | Datasheets, untracked |
License
CERN-OHL-S v2 (see LICENSE). Firmware and protocol live in their own repos
under openvalence.
Tooling
KiCad 10. Project: flagship/ossm-flagship.kicad_pro. Board Setup carries
the JLCPCB constraints and the stackup; flagship/stackup.md says why.
Parts come from LCSC through easyeda2kicad into the project library
flagship/lib/flagship.{kicad_sym,pretty,3dshapes}:
python -m venv .venv
.venv\Scripts\pip install easyeda2kicad
cd flagship\lib
..\..\.venv\Scripts\easyeda2kicad --full --lcsc_id C2887910 --output . lagshipThen in the pulled footprint, the model path must read
${KIPRJMOD}/lib/flagship.3dshapes/... (easyeda2kicad writes it relative).
Parts
298| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 100n | Capacitor_SMD:C_0402_1005Metric | C13, C1101, C1102, C1103, C1104, C1105, C1106, C1107, C1108, C1110, C1111, C1113, C1114, C1115, C1116, C1117 +8 |
| 22 | 10k | Resistor_SMD:R_0402_1005Metric | R1008, R1009, R1012, R1013, R1101, R1103, R1105, R1107, R1109, R1110, R1111, R1112, R1113, R1115, R1116, R1204 +6 |
| 16 | 1k | Resistor_SMD:R_0402_1005Metric | R20, R21, R27, R29, R602, R605, R606, R903, R904, R1006, R1007, R1010, R1011, R1114, R1120, R1121 |
| 11 | 2.2u 100V HMK325B7225KM-P | Capacitor_SMD:C_1210_3225Metric | C3, C4, C7, C101, C102, C103, C104, C201, C202, C203, C204 |
| 10 | 10k | Resistor_SMD:R_0603_1608Metric | R413, R414, R504, R507, R512, R804, R806, R1117, R1118, R1203 |
| 10 | 220R | Resistor_SMD:R_0402_1005Metric | R1001, R1002, R1016, R1017, R1018, R1019, R1020, R1021, R1022, R1023 |
| 7 | 100k | Resistor_SMD:R_0402_1005Metric | R409, R410, R701, R905, R906, R1003, R1004 |
| 5 | 100R | Resistor_SMD:R_0402_1005Metric | R402, R607, R1005, R1102, R1122 |
| 4 | 100u 63V 118EC243 | Capacitor_SMD:CP_Elec_10x10.5 | C1, C2, C5, C6 |
| 4 | 2.2k | Resistor_SMD:R_0402_1005Metric | R901, R902, R1014, R1015 |
| 4 | 22u 25V | Capacitor_SMD:C_1210_3225Metric | C108, C109, C110, C111 |
| 4 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q701, Q901, Q902, Q903 |
| 4 | BSC040N10NS5 | flagship:PG-TDSON-8_GDS | Q2, Q401, Q402, Q501 |
| 4 | HS finger | flagship:HS_Finger_Pin | H1, H2, H3, H4 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R105, R205, R405 |
| 3 | 10u 10V | Capacitor_SMD:C_0603_1608Metric | C15, C17, C1301 |
| 3 | 39.2k | Resistor_SMD:R_0603_1608Metric | R103, R203, R404 |
| 3 | 47u 10V | Capacitor_SMD:C_1210_3225Metric | C208, C209, C210 |
| 3 | PESD3V3S2UT | Package_TO_SOT_SMD:SOT-23 | D901, D1001, D1002 |
| 2 | 100n 100V | Capacitor_SMD:C_0805_2012Metric | C403, C803 |
| 2 | 10n | Capacitor_SMD:C_0402_1005Metric | C404, C405 |
| 2 | 15R PWR263S-35 | flagship:R_TO-263_Bourns_PWR263S | R521, R522 |
| 2 | 180R | Resistor_SMD:R_0402_1005Metric | R603, R604 |
| 2 | 1n | Capacitor_SMD:C_0402_1005Metric | C501, C504 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C114, C213 |
| 2 | 1u 25V | Capacitor_SMD:C_0402_1005Metric | C1112, C1202 |
| 2 | 2.2u | Capacitor_SMD:C_0402_1005Metric | C113, C212 |
| 2 | 2m CSS2H-2512K-2L00F | flagship:R_2512_Shunt_PseudoKelvin | R1, R401 |
| 2 | 33R | Resistor_SMD:R_0402_1005Metric | R1024, R1025 |
| 2 | 4.7k | Resistor_SMD:R_0402_1005Metric | R24, R25 |
| 2 | 470n | Capacitor_SMD:C_0402_1005Metric | C107, C207 |
| 2 | 47n 100V | Capacitor_SMD:C_0603_1608Metric | C112, C211 |
| 2 | 53.6k | Resistor_SMD:R_0603_1608Metric | R102, R202 |
| 2 | 845k | Resistor_SMD:R_0603_1608Metric | R101, R201 |
| 2 | 97730506332 | Mounting_Wuerth:Mounting_Wuerth_WA-SMSI-M1.6_H5mm_ThreadDepth2mm_97730506332 | H5, H6 |
| 2 | BZT52C15 | Diode_SMD:D_SOD-123 | D802, D803 |
| 2 | GND | TestPoint:TestPoint_Pad_D1.5mm | TP902, TP1103 |
| 2 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q404, Q405 |
| 2 | SMA6J48CA | Diode_SMD:D_SMA | D401, D501 |
| 1 | 0.1A 1206L010/60NRL | Fuse:Fuse_1206_3216Metric | F601 |
| 1 | 0.2A 1206L020/30NR | Fuse:Fuse_1206_3216Metric | F1004 |
| 1 | 0.5A 1206L050/30NR | Fuse:Fuse_1206_3216Metric | F1006 |
| 1 | 0.5A 1206L050/33NR | Fuse:Fuse_1206_3216Metric | F701 |
| 1 | 100R | Resistor_SMD:R_2512_6332Metric | R412 |
| 1 | 100n 50V | Capacitor_SMD:C_0402_1005Metric | C502 |
| 1 | 100p C0G | Capacitor_SMD:C_0603_1608Metric | C205 |
| 1 | 100u 25V RVT1E101M0607 | Capacitor_SMD:CP_Elec_6.3x7.7 | C702 |
| 1 | 100u SWPA6045S101MT | Inductor_SMD:L_Sunlord_SWPA6045S | L701 |
| 1 | 10R | Resistor_SMD:R_0402_1005Metric | R801 |
| 1 | 10R | Resistor_SMD:R_0603_1608Metric | R505 |
| 1 | 10k SDNT1608X103F3435FTF | Resistor_SMD:R_0603_1608Metric | TH501 |
| 1 | 12.1k | Resistor_SMD:R_0603_1608Metric | R502 |
| 1 | 120R DNP | Resistor_SMD:R_0402_1005Metric | R23 |
| 1 | 150p C0G | Capacitor_SMD:C_0603_1608Metric | C105 |
| 1 | 15A 0451015.MRL | flagship:Fuse_NANO2_451_3Pad | F1 |
| 1 | 160k | Resistor_SMD:R_1206_3216Metric | R1104 |
| 1 | 160k | Resistor_SMD:R_0603_1608Metric | R1106 |
| 1 | 17.8k | Resistor_SMD:R_0603_1608Metric | R803 |
| 1 | 1A 1206L100/24NR | Fuse:Fuse_1206_3216Metric | F1003 |
| 1 | 1R | Resistor_SMD:R_1206_3216Metric | R704 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R702 |
| 1 | 1m WSK12161L000FEA | flagship:R_Shunt_Vishay_WSK1216_Kelvin | R2 |
| 1 | 1u 25V | Capacitor_SMD:C_0805_2012Metric | C401 |
| 1 | 1u 25V | Capacitor_SMD:C_0603_1608Metric | C1109 |
| 1 | 2.2k | Resistor_SMD:R_0603_1608Metric | R513 |
| 1 | 22n 100V | Capacitor_SMD:C_0603_1608Metric | C801 |
| 1 | 22n C0G | Capacitor_SMD:C_0805_2012Metric | C802 |
| 1 | 22u 10V | Capacitor_SMD:C_0805_2012Metric | C1302 |
| 1 | 22u 25V | Capacitor_SMD:C_1206_3216Metric | C701 |
| 1 | 24.9k | Resistor_SMD:R_0603_1608Metric | R206 |
| 1 | 27k | Resistor_SMD:R_1206_3216Metric | R30 |
| 1 | 3.01M | Resistor_SMD:R_0603_1608Metric | R503 |
| 1 | 3.3k | Resistor_SMD:R_0603_1608Metric | R508 |
| 1 | 3.3n | Capacitor_SMD:C_0603_1608Metric | C1201 |
| 1 | 3.3u FXL0630 | Inductor_SMD:L_Changjiang_FXL0630 | L2 |
| 1 | 3.4k | Resistor_SMD:R_0603_1608Metric | R403 |
| 1 | 30.1k | Resistor_SMD:R_0603_1608Metric | R408 |
| 1 | 348k | Resistor_SMD:R_1206_3216Metric | R501 |
| 1 | 374k | Resistor_SMD:R_1206_3216Metric | R802 |
| 1 | 39k | Resistor_SMD:R_0402_1005Metric | R1108 |
The 225 most common of 298 parts.
Questions
How big is the Ossm flagship PCB?
It measures 75 × 75 mm and has 6 copper layers, 1.65 mm thick.
What parts does the Ossm flagship use?
298 parts, built around the BSC040N10NS5, PESD3V3S2UT, PWR263S-35-15R0JE and BZT52C15. 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 Ossm flagship KiCad files?
From the openvalence/Hardware repository on GitHub, at the commit this page was made from: the board is flagship/ossm-flagship.kicad_pcb and its schematic flagship/ossm-flagship.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ossm flagship design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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