2 Position Wire to Board Terminal Block, Screw Terminal Block Through Hole 5.08mm LCSC Part Number: C474952 JLCPCB Part Class: Extended Part Manufactured by KEFA(科发)

1x4P 4P PH Tin 4 -25℃~+85℃ 2A 1 2mm Copper alloy Horizontal attachment SMD,P=2mm,Surface Mount，Right Angle Wire To Board Connector ROHS S4B-PH-SM4-TB(LF)(SN) CONN-SMD_S4B-PH-SM4-TB-LF-SN LCSC Part Number: C265102 JLCPCB Part Class: Extended Part Manufactured by JST

1x5P 5P XH Tin 5 -25℃~+85℃ 3A 1 2.5mm Brass Direct Insert Plugin,P=2.5mm Wire To Board Connector ROHS B5B-XH-A(LF)(SN) CONN-TH_B5B-XH-A-LF-SN LCSC Part Number: C157991 JLCPCB Part Class: Extended Part Manufactured by JST

1x3P 3P XH Tin 3 -25℃~+85℃ 3A 1 2.5mm Brass Direct Insert Plugin,P=2.5mm Wire To Board Connector ROHS B3B-XH-A(LF)(SN) CONN-TH_3P-P2.50_A2501WV2-3P LCSC Part Number: C144394 JLCPCB Part Class: Extended Part Manufactured by JST

Screw terminal KF128-5.08-3P-AA CONN-TH_3P-P5.08_KF128-5.08-3P LCSC Part Number: C474953 JLCPCB Part Class: Extended Part Manufactured by KEFA(科发)

1x2P -30℃~+120℃ 17A 250V Blue 14~22 Direct Insert 5mm 1.5 1 2 Plugin,P=5mm Screw Terminal Blocks ROHS KF301-5.0-2P CONN-TH_P5.00_KF301-5.0-2P LCSC Part Number: C474881 JLCPCB Part Class: Extended Part Manufactured by KEFA(科发)

3.6mm 2.5mm Rectangle button 50mA Standing paste 6.1mm SPST 100000 Times 250gf 12V SMD Tactile Switches ROHS K2-1107ST-A4DW-06 KEY-SMD_L6.2-W3.6-LS8.0 LCSC Part Number: C118141 JLCPCB Part Class: Extended Part Manufactured by 韩国韩荣

1.8A USB 2.0 1 Horizontal attachment 5P Female -20℃~+85℃ Micro-B SMD USB Connectors ROHS MicroXNJ MICRO-USB-SMD_MICROXNJ LCSC Part Number: C404969 JLCPCB Part Class: Extended Part Manufactured by SHOU HAN(首韩)

35V 5kV 50mA 100mV@1mA,20mA 1 6V 1.2V DC SMD-4P Transistor, Photovoltaic Output Optoisolators ROHS PC817B DIP-4_L4.6-W6.5-P2.54-LS7.6-BL LCSC Part Number: C115499 JLCPCB Part Class: Extended Part Manufactured by 华润华晶

35V 5kV 50mA 100mV@1mA,20mA 1 6V 1.2V DC SMD-4P Transistor, Photovoltaic Output Optoisolators ROHS PC817C DIP-4_L4.6-W6.5-P2.54-LS7.6-BL LCSC Part Number: C115500 JLCPCB Part Class: Extended Part Manufactured by 华润华晶

SOP-4-2.54mm Transistor, Photovoltaic Output Optoisolators ROHS PC817C-S SOP-4_L6.5-W4.6-P2.54-LS10.3-TL LCSC Part Number: C3008369 JLCPCB Part Class: Extended Part Manufactured by UMW(友台半导体) The ESDA18-1K is a transient voltage suppression and electrostatic discharge protection device designed to protect sensitive electronic circuits from ESD events, surge transients, and electrical overstress conditions. Manufactured by STMicroelectronics and commonly used in communication and embedded electronic systems, this device provides fast-response protection for signal lines and low-voltage interfaces exposed to external electrical disturbances. The component utilizes low-capacitance TVS diode technology to clamp transient voltages while maintaining signal integrity on high-speed communication lines. It is optimized for protecting USB interfaces, GPIO lines, communication ports, sensor interfaces, and portable electronic devices from electrostatic discharge damage and transient spikes. The ESDA18-1K is widely used in industrial electronics, consumer devices, embedded systems, communication hardware, and portable equipment requiring compact and reliable ESD suppression. Its small surface-mount package enables easy integration into high-density PCB layouts while improving overall system reliability and EMC robustness. Engineering Specification Device Type Transient voltage suppression and ESD protection diode Protection Function Electrostatic discharge and surge transient suppression Protection Architecture Single-line TVS protection structure Response Characteristics Fast transient clamping response Signal Compatibility Suitable for low-voltage and high-speed signal interfaces Capacitance Characteristics Low capacitance for minimal signal distortion Electrical Performance Low leakage current and stable clamping behavior Reliability Features High ESD robustness and transient tolerance Mounting Style Surface mount technology Package Type Compact SOD-style surface-mount package Thermal Characteristics Low-power passive protection structure EMC Features Enhanced electromagnetic compatibility protection support Applications USB interface protection GPIO protection Communication interfaces Embedded systems Portable electronics Industrial control hardware Sensor interfaces Consumer electronics Signal line protection Data communication systems Manufacturer STMicroelectronics #commonpartslibrary #esdprotection #tvsdiode #transientprotection #signalprotection #stmicroelectronics #embeddedhardware #electronicsdesign

Direct Insert Policy 2.5mm 2P 6mm -40℃~+105℃ 3mm 2.54mm Single Row Black Brass 1x2P Plugin,P=2.54mm Pin Headers ROHS PZ254V-11-02P HDR-TH_2P-P2.54-V-M LCSC Part Number: C492401 JLCPCB Part Class: Extended Part Manufactured by XFCN(兴飞)

250V 3A Direct Insert Policy 2.5mm 3P 6mm -40℃~+105℃ 3mm 2.54mm Single Row Black 1x3P Plugin,P=2.54mm Pin Headers ROHS PZ254V-11-03P HDR-TH_3P-P2.54-V-M LCSC Part Number: C2937625 JLCPCB Part Class: Extended Part Manufactured by XFCN(兴飞)

250V 3A Direct Insert Policy 2.5mm 4P 6mm -40℃~+105℃ 3mm 2.54mm Single Row Black 1x4P Plugin,P=2.54mm Pin Headers ROHS PZ254V-11-04P HDR-TH_4P-P2.54-V-M LCSC Part Number: C2691448 JLCPCB Part Class: Extended Part Manufactured by XFCN(兴飞)

SMD,2x2mm RGB LEDs(Built-in IC) ROHS (LED) WS2812B-2020 LED-SMD_4P-L2.0-W2.0-TL_WS2812B-2020 LCSC Part Number: C965555 JLCPCB Part Class: Extended Part Manufactured by worldsemi