# Boxbar ST01 ## Description Compact PCB power board: 24 V DC Phoenix-style input, 12 V/3 A pin output, 5 V ESP32 pin output, and 5 V USB-A/3 A output. ## Project Details - **Owner:** juanboxbar - **Created:** 6/30/2026 - **Last Updated:** 7/20/2026 - **Visibility:** Public ## Key Components ### D1 — [SPHV36-01ETG-C](https://www.flux.ai/adrian95/sphv36-01etg-c~7wr.md) - Manufacturer Name: Littelfuse Inc. - Manufacturer Part Number: SPHV36-01ETG-C - Datasheet URL: https://www.verical.com/datasheet/littelfuse-tvs-SPHV36-01ETG-C-895267.pdf - Part Type: Diode - Role: Input TVS clamp - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - C [pin 1] ### D6 — [S3MB](https://www.flux.ai/lcsc/s3mb~hfh8.md) - Product Info Url: https://lcsc.com/product-detail/Diodes-General-Purpose_LITEON-S3MB_C388239.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Diodes-Incorporated-S3MB_C388239.pdf - LCSC Part Number: C388239 - Manufacturer Part Number: S3MB - JLCPCB Part Class: Extended Part - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - Part Type: Diodes - General Purpose - Role: Flyback / Freewheeling - Manufacturer Name: DIODES(美台) **Pins:** - A [pin 2] - C [pin 1] ### D7 — [S3MB](https://www.flux.ai/lcsc/s3mb~hfh8.md) - Manufacturer Name: DIODES(美台) - Role: Flyback / Freewheeling - JLCPCB Part Class: Extended Part - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - Part Type: Diodes - General Purpose - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Diodes-Incorporated-S3MB_C388239.pdf - LCSC Part Number: C388239 - Manufacturer Part Number: S3MB - Product Info Url: https://lcsc.com/product-detail/Diodes-General-Purpose_LITEON-S3MB_C388239.html **Pins:** - A [pin 2] - C [pin 1] ### D8 — [S3MB](https://www.flux.ai/lcsc/s3mb~hfh8.md) - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - JLCPCB Part Class: Extended Part - Part Type: Diodes - General Purpose - Manufacturer Name: DIODES(美台) - Role: Flyback / Freewheeling - Product Info Url: https://lcsc.com/product-detail/Diodes-General-Purpose_LITEON-S3MB_C388239.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Diodes-Incorporated-S3MB_C388239.pdf - LCSC Part Number: C388239 - Manufacturer Part Number: S3MB **Pins:** - A [pin 2] - C [pin 1] ### D9 — [S3MB](https://www.flux.ai/lcsc/s3mb~hfh8.md) - Role: Flyback / Freewheeling - Manufacturer Name: DIODES(美台) - Part Type: Diodes - General Purpose - JLCPCB Part Class: Extended Part - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - Manufacturer Part Number: S3MB - LCSC Part Number: C388239 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Diodes-Incorporated-S3MB_C388239.pdf - Product Info Url: https://lcsc.com/product-detail/Diodes-General-Purpose_LITEON-S3MB_C388239.html **Pins:** - A [pin 2] - C [pin 1] ### F1 — [SMDC300F/24-2](https://www.flux.ai/adrian95/smdc300f24-2~g9i.md) - Manufacturer Name: Littelfuse Inc. - Part Type: Fuse - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.littelfuse.com/assetdocs/littelfuse-ptc-smdc-datasheet?assetguid=fe4ad2df-5520-4041-9ddc-2b0ce6e0aaee - Manufacturer Part Number: SMDC300F/24-2 - Role: Input PTC fuse **Pins:** - P1 [pin 1] - P2 [pin 2] ### J10 — [1755736](https://www.flux.ai/lcsc/1755736~n51l.md) - Product Info Url: https://lcsc.com/product-detail/Pluggable-System-Terminal-Block_Phoenix-Contact-1755736_C480503.html - Part Type: Pluggable System Terminal Block - Manufacturer Name: Phoenix Contact(菲尼克斯) - Role: Solenoid Connector - Manufacturer Part Number: 1755736 - JLCPCB Part Class: Extended Part - Connector Positions: 2 - Package or Case Code: CONN-TH_1755736 - LCSC Part Number: C480503 - Role Details: Solenoid 1: pin 1=switched +24V via relay K1, pin 2=GND. - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2001071235_Phoenix-Contact-1755736_C480503.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### J11 — [1755736](https://www.flux.ai/lcsc/1755736~n51l.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2001071235_Phoenix-Contact-1755736_C480503.pdf - Connector Positions: 2 - Role Details: Solenoid 2: pin 1=switched +24V via relay K2, pin 2=GND. - Package or Case Code: CONN-TH_1755736 - LCSC Part Number: C480503 - Role: Solenoid Connector - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 1755736 - Manufacturer Name: Phoenix Contact(菲尼克斯) - Part Type: Pluggable System Terminal Block - Product Info Url: https://lcsc.com/product-detail/Pluggable-System-Terminal-Block_Phoenix-Contact-1755736_C480503.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### J12 — [B2B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b2b-xh-alfsn~5xx.md) - Connector Type: Headers and Wire Housings - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Part Type: Connector - Role: Power Conversion - Manufacturer Part Number: B2B-XH-A(LF)(SN) - Role Details: Auxiliary 5V/GND output for short LED strip using JST XH B2B-XH-A(LF)(SN): pin 1 = +5V, pin 2 = GND. - License: https://creativecommons.org/licenses/by/4.0/ - Connector Positions: 2 - Connector Pitch: 2.5mm - Manufacturer Name: JST Sales America Inc. - Symbol Style: parametric-v1 **Pins:** - P1 [pin 1] - P2 [pin 2] ### J13 — [B2B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b2b-xh-alfsn~5xx.md) - Connector Pitch: 2.5mm - Role: Power Conversion - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B2B-XH-A(LF)(SN) - Connector Positions: 2 - Manufacturer Name: JST Sales America Inc. - Symbol Style: parametric-v1 - Role Details: Auxiliary 5V/GND output for ESP32-S3-Touch-LCD-2.8C display power only using JST XH B2B-XH-A(LF)(SN): pin 1 = +5V, pin 2 = GND. - Connector Type: Headers and Wire Housings - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J14 — [SSW-122-01-F-S](https://www.flux.ai/adrian95/ssw-122-01-f-s~er3.md) - Role Details: Female receptacle/socket strip for ESP32-S3-DevKitC-1U-N8R8 J1 row. Samtec SSW-122-01-F-S, 1x22, 2.54mm pitch, through-hole. Accepts DevKit male header pins. - Connector Gender: Female - Manufacturer Part Number: SSW-122-01-F-S - Connector Positions: 22 - Role: Interconnect - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/6129/ssw-1xx-xx-xxx-x-xx-xxx-xx-mkt.pdf - Package or Case Code: SAMTEC_SSW-122-01-F-S - Manufacturer Name: Samtec - Connector Type: Headers and Wire Housings - Connector Pitch: 2.54mm **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] - 07 [pin 07] - 08 [pin 08] - 09 [pin 09] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] ### J15 — [SSW-122-01-F-S](https://www.flux.ai/adrian95/ssw-122-01-f-s~er3.md) - Connector Gender: Female - Manufacturer Name: Samtec - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/6129/ssw-1xx-xx-xxx-x-xx-xxx-xx-mkt.pdf - Connector Type: Headers and Wire Housings - Package or Case Code: SAMTEC_SSW-122-01-F-S - Connector Positions: 22 - Role: Interconnect - Manufacturer Part Number: SSW-122-01-F-S - Role Details: Female receptacle/socket strip for ESP32-S3-DevKitC-1U-N8R8 J3 row. Samtec SSW-122-01-F-S, 1x22, 2.54mm pitch, through-hole. Place row 22.86mm from J14 centerline. - Connector Pitch: 2.54mm **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] - 07 [pin 07] - 08 [pin 08] - 09 [pin 09] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] ### J2 — [B2B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b2b-xh-alfsn~5xx.md) - Role Details: 5V/GND output for Android/external device using JST XH B2B-XH-A(LF)(SN): pin 1 = +5V, pin 2 = GND. Replaces physical USB-A connector; no USB data lines. - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Manufacturer Name: JST Sales America Inc. - Symbol Style: parametric-v1 - Connector Positions: 2 - Connector Pitch: 2.5mm - Role: Power Conversion - Connector Type: Headers and Wire Housings - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B2B-XH-A(LF)(SN) **Pins:** - P1 [pin 1] - P2 [pin 2] ### J5 — [DB2EVC-5.08-2P-BK](https://www.flux.ai/lcsc/db2evc-5p08-2p-bk~eefk.md) - Role: Power Conversion - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2303271530_DORABO-DB2EVC-5-08-2P-BK_C430457.pdf - Part Type: Pluggable System Terminal Block - LCSC Part Number: C430457 - Manufacturer Part Number: DB2EVC-5.08-2P-BK - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Pluggable-System-Terminal-Block_DIBO-DB2EVC-5-08-2P-BK_C430457.html - Connector Pitch: 5.08mm - Role Details: 2-way 24V DC input connector: pin 1 = +24V raw input, pin 2 = GND. User-requested C430457 / Dorabo DB2EVC-5.08-2P-BK. - Manufacturer Name: DORABO(地博电气) - Package or Case Code: CONN-TH_2P-P5.08_DB2EVC-5.08-2P-BK - Connector Positions: 2 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J6 — [1755752](https://www.flux.ai/lcsc/1755752~broo.md) - Part Type: Pluggable System Terminal Block - Manufacturer Name: Phoenix Contact(菲尼克斯) - Package or Case Code: CONN-TH_1755752 - LCSC Part Number: C480510 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2001071235_Phoenix-Contact-1755752_C480510.pdf - Manufacturer Part Number: 1755752 - Product Info Url: https://lcsc.com/product-detail/Pluggable-System-Terminal-Block_Phoenix-Contact-1755752_C480510.html - Role Details: Actuator 1 T16-200-22-12-R: pin 1=Power +12V, pin 2=0V, pin 3=Signal from ESP1 GPIO2, pin 4=Shared GND. - Role: Actuator Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J7 — [1755752](https://www.flux.ai/lcsc/1755752~broo.md) - Package or Case Code: CONN-TH_1755752 - Manufacturer Name: Phoenix Contact(菲尼克斯) - Part Type: Pluggable System Terminal Block - LCSC Part Number: C480510 - Role Details: Actuator 2 T16-200-22-12-R: pin 1=Power +12V, pin 2=0V, pin 3=Signal from ESP1 GPIO3, pin 4=Shared GND. - Product Info Url: https://lcsc.com/product-detail/Pluggable-System-Terminal-Block_Phoenix-Contact-1755752_C480510.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2001071235_Phoenix-Contact-1755752_C480510.pdf - JLCPCB Part Class: Extended Part - Role: Actuator Connector - Manufacturer Part Number: 1755752 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J8 — [KF2EDGVC-5.08-3P](https://www.flux.ai/lcsc/kf2edgvc-5p08-3p~6yo5.md) - Connector Pitch: 5.08mm - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2303311930_Cixi-Kefa-Elec-KF2EDGVC-5-08-3P_C441387.pdf - Manufacturer Part Number: KF2EDGVC-5.08-3P - Package or Case Code: CONN-TH_3P-P5.08_KF2EDGVC-5.08-3P - Part Type: Pluggable System Terminal Block - LCSC Part Number: C441387 - Role: Flowmeter Connector - Manufacturer Name: KEFA(科发) - Product Info Url: https://lcsc.com/product-detail/Pluggable-System-Terminal-Block_Cixi-Kefa-Elec-KF2EDGVC-5-08-3P_C441387.html - Role Details: Flowmeter 1 Titan 300-010: pin 1=+5V, pin 2=GND, pin 3=pulse signal to ESP1 GPIO4 with 10k pull-up to 3V3. - Connector Positions: 3 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J9 — [KF2EDGVC-5.08-3P](https://www.flux.ai/lcsc/kf2edgvc-5p08-3p~6yo5.md) - Manufacturer Name: KEFA(科发) - Connector Positions: 3 - Product Info Url: https://lcsc.com/product-detail/Pluggable-System-Terminal-Block_Cixi-Kefa-Elec-KF2EDGVC-5-08-3P_C441387.html - Role: Flowmeter Connector - Role Details: Flowmeter 2 Titan 300-010: pin 1=+5V, pin 2=GND, pin 3=pulse signal to ESP1 GPIO5 with 10k pull-up to 3V3. - JLCPCB Part Class: Extended Part - Manufacturer Part Number: KF2EDGVC-5.08-3P - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2303311930_Cixi-Kefa-Elec-KF2EDGVC-5-08-3P_C441387.pdf - Connector Pitch: 5.08mm - Part Type: Pluggable System Terminal Block - Package or Case Code: CONN-TH_3P-P5.08_KF2EDGVC-5.08-3P - LCSC Part Number: C441387 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### K1 — [HF49FD/005-1H11TF](https://www.flux.ai/adrian95/hf49fd005-1h11tf.md) - Mount: PCB - Manufacturer Part Number: HF49FD/005-1H11TF - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Relay - Manufacturer Name: Hongfa - Datasheet URL: https://source.hongfa.com//pdf/web/viewer.html?file=/Uploads/Product/PDF/HF49FD_en.pdf?timestamp=1743412019 - Role Details: Relay coil driven from ESP1 GPIO9 via Q1; contacts switch +24V to solenoid 1. - Role: Switching **Pins:** - COIL_1 [pin 3] - COIL_2 [pin 4] - COM [pin 1] - NO [pin 2] ### K2 — [HF49FD/005-1H11TF](https://www.flux.ai/adrian95/hf49fd005-1h11tf.md) - Mount: PCB - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Relay - Manufacturer Name: Hongfa - Manufacturer Part Number: HF49FD/005-1H11TF - Datasheet URL: https://source.hongfa.com//pdf/web/viewer.html?file=/Uploads/Product/PDF/HF49FD_en.pdf?timestamp=1743412019 - Role: Switching - Role Details: Relay coil driven from ESP1 GPIO10 via Q2; contacts switch +24V to solenoid 2. **Pins:** - COIL_1 [pin 3] - COIL_2 [pin 4] - COM [pin 1] - NO [pin 2] ### Q1 — [MMSS8050-H-TP](https://www.flux.ai/vasy_skral/mmss8050-h-tp~16p.md) - Manufacturer Name: Micro Commercial Co - Part Type: Transistor - Datasheet URL: https://www.mccsemi.com/pdf/Products/MMSS8050(SOT-23).pdf - Manufacturer Part Number: MMSS8050-H-TP - Role: Switching **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q2 — [MMSS8050-H-TP](https://www.flux.ai/vasy_skral/mmss8050-h-tp~16p.md) - Role: Switching - Manufacturer Part Number: MMSS8050-H-TP - Datasheet URL: https://www.mccsemi.com/pdf/Products/MMSS8050(SOT-23).pdf - Manufacturer Name: Micro Commercial Co - Part Type: Transistor **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### U1 — [LMR33630ADDA](https://www.flux.ai/cherepanyadima/lmr33630adda.md) - Role: 12V 3A buck regulator - Manufacturer Part Number: LMR33630ADDA - Role Details: Configured target VOUT=12V, IOUT max=3A from regulated 24V input. - Part Type: Integrated Circuits - Manufacturer Name: Texas Instruments - Datasheet URL: http://www.ti.com/lit/ds/symlink/lmr33630.pdf - Package or Case Code: TO **Pins:** - BOOT [pin 7] - EN [pin 3] - EP [pin 9] - FB [pin 5] - PG [pin 4] - PGND [pin 1] - SW [pin 8] - VCC [pin 6] - VIN [pin 2] ### U2 — [CCG30-24-05S](https://www.flux.ai/jecstronic/ccg30-24-05s~8lb.md) - Manufacturer Name: TDK-Lambda Americas Inc - Role Details: 5V 6A DC/DC module, 9–36V input; smaller replacement for IRE-24/5-Q12PF-C supporting USB-A 3A plus ESP32 headroom. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Power Source - Datasheet URL: https://product.tdk.com/en/system/files?file=dam/doc/product/power/switching-power/dc-dc-converter/catalog/ccg_e.pdf - Manufacturer Part Number: CCG30-24-05S - Role: Power Conversion **Pins:** - -VIN [pin 2] - -VOUT [pin 6] - +VIN [pin 3] - +VOUT [pin 4] - RC [pin 1] - TRM [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/juanboxbar/boxbar-st01~qm](https://www.flux.ai/juanboxbar/boxbar-st01~qm).* --- *Generated from [https://www.flux.ai/juanboxbar/boxbar-st01~qm](https://www.flux.ai/juanboxbar/boxbar-st01~qm)*