2 layers20.3 × 20.3 mm
2 layers225 × 180 mm
DC Load
yjv/dc-load-schematic- Size
- 225 × 180 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 160
- Nets
- 133
- Pads
- 500
- Tracks, vias
- 905, 165
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Jan 2025
- Updated
- 21 Oct 2026
Overview
DC Load is an open-source printed circuit board by yjv, from the yjv/dc-load-schematic repository on GitHub. It is a 2-layer board of 225 × 180 mm with 160 parts on 133 nets, routed with 905 tracks and 165 vias.
It is built around the NKE1212DC, NMA1209SC and NMG1224SC, with the TBA 1-1219, AD7175-2BRUZ and INA826AID among its other parts. Its parts include 66 capacitors, 19 ICs, 6 resistors, 6 connectors and 4 inductors. It belongs with the ESP32 and AVR (ATmega, ATtiny) boards of this library.
Main components
12NKE1212DC
-Isolated Power ModulesMurata
NMA1209SC
-10.8V~13.2V 1W 1kV 2 55mA 74% 9V - Isolated Power Modules ROHSMurataIsolated Power ModulesNMG1224SC
SIP,19.6x7.6mmIsolated Power ModulesMurataTBA 1-1219
SIP,11.7x6mmIsolated Power ModulesTRACO POWER
AD7175-2BRUZ
TSSOP-24-40℃~+105℃ 10uA 14MHz~16.384MHz、16MHz 2 24 250kHz 250kHz 2V~5V、5V 2ppm/℃ 85dB Built-in Built-in External、Built-in SPI Sigma-Delta Yes TSSOP-24 Analog to Digital Converters (ADC) ROHSAnalog DevicesAnalog To Digital Converters (ADC)
INA826AID
SOIC-8-18V~-1.5V、1.5V~18V -40℃~+125℃ 1 100dB 104dB 150uV 16mA 18nV/√Hz@1kHz 1MHz 1V/us 200uA 2uV/℃ 35nA 36V 3V~36V 5nA Rail-to-Rail Output SOIC-8 Instrumentation Amplifiers ROHSTexas InstrumentsInstrumentation Amplifiers
MAX31850KATB+
TDFN-10-EP(3x4)-40℃~+125℃ 0.28uA 1 14 3V~3.7V 8LSB Built-in temperature sensor Single bus Thermocouple-to-Digital Converter TDFN-10-EP(3x4) ADCs/DACs - Special Purpose ROHSMaxim Integrated (Analog Devices)ADCs/DACs - Special Purpose
MAX5719GSD+
SOIC-14-40℃~+105℃ 1 1LSB 20 4.5V~5.5V 750ns 750uA Power-on reset、Bipolar output SPI、QSPI、MICROWIRE Voltage-Unbuffered SOIC-14 Digital to Analog Converters (DAC) ROHSMaxim Integrated (Analog Devices)Digital To Analog Converters (DAC)
ISO7741FQDBQRQ1
SSOP-16-150mil-40℃~+125℃ 1 10.7ns 100Mbps 100kV/us 2.25V~5.5V 2.25V~5.5V 3 3000 Low Level SSOP-16-150mil Digital Isolators ROHSTexas InstrumentsDigital Isolators
L78L33ACD13TR-HXY
SOP-80℃~+125℃ 1 1.7V 100mA 3.3V 30V 40uV 49dB@(120Hz) Fixed Over Temperature Protection、Short Circuit Protection Positive SOP-8 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSHXY MOSFETVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
DI79L05UAB
SOT-89-40℃~+125℃@(Tj) 1 1.7V 100mA 20V 42uVrms 49dB@(120Hz) 5V 6mA Fixed Negative Over Temperature Protection、Short Circuit Protection SOT-89 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDIOTECVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
ISO7740FQDBQRQ1
SSOP-16Digital IsolatorsTexas Instruments
Parts
160| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | TestPoint | TestPoint:TestPoint_Pad_SMD-0603 | TP1, TP2, TP3, TP10, TP11, TP26, TP27, TP28, TP29, TP30, TP31, TP32, TP33, TP34, TP35, TP36 +8 |
| 18 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C35, C36, C37, C38, C52, C53, C56, C57, C58, C59, C61, C62, C64, C65, C66, C67 +2 |
| 14 | TestPoint | TestPoint:TestPoint_Keystone_5010-5014_Multipurpose | TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23, TP24, TP25 |
| 12 | .1u | Capacitor_SMD:C_0603_1608Metric | C2, C3, C7, C13, C15, C16, C18, C30, C39, C44, C45, C51 |
| 10 | 1u | Capacitor_SMD:C_1206_3216Metric | C9, C19, C21, C22, C23, C34, C42, C43, C55, C63 |
| 8 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C4, C6, C25, C32, C50, C54, C60 |
| 4 | 270p | Capacitor_SMD:C_0603_1608Metric | C46, C47, C48, C49 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H3, H4, H5, H6 |
| 3 | 0.33u | Capacitor_SMD:C_0805_2012Metric | C26, C27, C28 |
| 3 | 47u | 11R473C_47uH:11R473C | L1, L3, L4 |
| 3 | ISO7741FQDBQRQ1 | ISO7741FQDBQRQ1:SOP64P600X175-16N | IC12, IC17, IC18 |
| 3 | REF7050QDGKR | REF7050QDGKR:SOP65P490X110-8N | IC1, IC3, IC10 |
| 2 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C29, C31 |
| 2 | 0.47u | Capacitor_SMD:C_0805_2012Metric | C20, C24 |
| 2 | 180p | Capacitor_SMD:C_0805_2012Metric | C5, C17 |
| 2 | 680p | Capacitor_SMD:C_0603_1608Metric | C40, C41 |
| 2 | 9.09k | Resistor_SMD:R_1206_3216Metric | R1, R2 |
| 2 | L78L33ACD13TR | L78L33ACD13TR:SOIC127P600X175-8N | IC6, IC7 |
| 2 | OPA210IDGKR | OPA210IDGKR:SOP65P490X110-8N | IC5, IC14 |
| 2 | UI | 1190363:1190363 | J1, J7 |
| 1 | 0.01u | Capacitor_SMD:C_0805_2012Metric | C12 |
| 1 | 15.8k | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | 1904147 | 1904147:1904147 | J5 |
| 1 | 1n | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 2M | Resistor_SMD:R_2512_6332Metric | R4 |
| 1 | 4.7k | Resistor_SMD:R_1206_3216Metric | R6 |
| 1 | 540p | Capacitor_SMD:C_1210_3225Metric | C33 |
| 1 | 68u | 11R683C_68uH:11R683C | L2 |
| 1 | A0_Trim | 3386G-1-472LF_Trim_Pot:3386G1503LF | RV1 |
| 1 | A1_Trim | 3386G-1-472LF_Trim_Pot:3386G1503LF | RV2 |
| 1 | A2_Trim | 3386G-1-472LF_Trim_Pot:3386G1503LF | RV3 |
| 1 | AD7175-2BRUZ | AD7175-2BRUZ:SOP65P640X120-24N | IC4 |
| 1 | Arduino_Nano_ESP32 | Module:Arduino_Nano | A1 |
| 1 | Conn_01x06 | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2 |
| 1 | Current_Sense_Amp_Ref_Adjust | 3386G-1-472LF_Trim_Pot:3386G1503LF | RV4 |
| 1 | D | S2A:DIOM5336X245N | D1 |
| 1 | DI79L05UAB | Package_TO_SOT_SMD:SOT-89-3 | U1 |
| 1 | Fan | 1190363:1190363 | J3 |
| 1 | HPZR-C21-QX | HPZR-C21-QX:HPZRC21QX | D2 |
| 1 | INA296A3IDDFR | INA296A3IDDFR:SOT65P280X110-8N | IC15 |
| 1 | INA826AID | INA826AID:SOIC127P600X175-8N | IC13 |
| 1 | ISO7740FQDBQRQ1 | ISO7740FQDBQRQ1:SOP64P600X175-16N | IC11 |
| 1 | IXBOD1-08 | IXBOD1-08:IXBOD108 | D3 |
| 1 | L78L05ACD13TR | L78L05ACD13TR:SOIC127P600X175-8N | IC9 |
| 1 | L78L06ACD13TR | L78L06ACD13TR:SOIC127P600X175-8N | IC8 |
| 1 | LOGO | Logos:Logos | G*** |
| 1 | MAX31850K | Adafruit:MAX31850K | IC16 |
| 1 | MAX5719GSD+ | MAX5719GSD+:SOIC127P600X175-14N | IC2 |
| 1 | MSC017SMA120B4N | Package_TO_SOT_THT:TO-247-4_Vertical | Q1 |
| 1 | NKE1212DC | NKE1212DC:NKE0503DC | PS1 |
| 1 | NMA1209SC | NMA1209SC:NMA1209SC | PS3 |
| 1 | NMG1224SC | NMG1212SC:NMG0524SC | PS2 |
| 1 | NetTie_2 | NetTie:NetTie-2_SMD_Pad2.0mm | NT2 |
| 1 | PCS-0R0047D1 | PCBLIB_RES-TH_L22.3-W4.5-P7.62-L_2025-03-21:RES-TH_L22.3-W4.5-P7.62-L | R3 |
| 1 | Power In | 1190363:1190363 | J4 |
| 1 | RA-T2X-64E | RA-T2X-64E:RAT2X64E | H1 |
| 1 | TBA_1-1219 | TBA_1-1219:TBA1 | PS4 |
| 1 | VM1-038-1AE | VM1-038-1AE:VM1-038-1AE | H2 |
Questions
How big is the DC Load PCB?
It measures 225 × 180 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DC Load use?
160 parts, built around the NKE1212DC, NMA1209SC, NMG1224SC and TBA 1-1219. 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 DC Load KiCad files?
From the yjv/dc-load-schematic repository on GitHub, at the commit this page was made from: the board is DC Load.kicad_pcb and its schematic Adafruit-MAX31850-thermocouple-breakout-board-master/Adafruit MAX31850/Adafruit MAX31850.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DC Load design in my own project?
Its repository states no licence, so its author keeps all rights: ask yjv before reusing the design.
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