Marcus Chen
Senior Procurement Engineer
Shenzhen, China
Marcus has spent 11 years in electronic component procurement, covering semiconductors, passives and connectors for industrial and automotive customers. He joined PartsCube Global in 2024 after running sourcing for a Shenzhen EMS company.
Articles by Marcus Chen (42)
Connectors & Interconnects for In-Vehicle Infotainment: Design Tips & Component Selection
Design guidance for IVI system connectors covering high-speed data links, power delivery, and EMC requirements for automotive infotainment platforms in 2026.
KOA Speer Electronics, Inc. Product Line Overview: Key Series & Applications
A technical guide to KOA Speer's major resistor series — RK73 thick film, SG73 surge, WK73 wide terminal, PWR wirewound, CC current sense — with specs and appli
When to Choose Solid-State Relay vs Electromechanical Relay for Your Application
An engineer's practical breakdown of SSR vs EMR selection — switching frequency, leakage current, thermal management, and application-specific recommendations.
Where to Buy Connectors & Interconnects: Top Distributors & Authorized Sources
A procurement guide to authorized distributors for TE, Molex, Amphenol, Hirose, and JAE connectors — plus open-market best practices.
Top 10 KOA Speer Electronics Parts Every Hardware Engineer Should Know
Essential KOA Speer resistor series — RK73H, RN73H, TLR, SG73, WK73R — with specs, applications, and selection guidance for hardware engineers and procurement.
Why Souriau-Sunbank by Eaton Components Are Trusted Worldwide: A Deep Dive
A technical analysis of Souriau-Sunbank by Eaton connectors — MIL-DTL-38999 legacy, 8D/UTS/UBC series comparison, sealing performance, and sourcing consideratio
Connectors & Interconnects for Automotive Electronics: Design Tips & Component Selection
Engineering guide to automotive-grade connectors — AEC-Q200 qualification, USCAR standards, sealed vs unsealed housings, and real part numbers for ECU, sensor,
Automotive Infotainment Connector Specs: What Designers Actually Check
Practical design tips for selecting connectors in IVI systems — high-speed coax, board-to-board, and USB interfaces for automotive infotainment, with real part
Top 10 Souriau-Sunbank by Eaton Parts Every Hardware Engineer Should Know
Essential Souriau-Sunbank by Eaton connector series for aerospace, military, industrial, and railway designs — from the 8D MIL-spec to UTO push-pull connectors.
Beginner's Guide to Connectors & Interconnects: What Every Engineer Should Know
Master connector selection with key parameters—pitch, current rating, mating cycles, and contact resistance. Practical guide with real part numbers for hardware
Knowles Syfer Capacitors in Harsh Environments: Field Notes
Knowles Syfer's FlexiCap MLCCs, EMI feed-through filters, and high-voltage capacitors — the technology and applications behind their global reputation.
Wire-to-Board Connectors Selection Guide: Key Parameters & Top Picks in 2026
Selecting wire-to-board connectors — pitch, current rating, locking mechanisms, and the top series from Molex, JST, TE, and Hirose for 2026 designs.
Capacitors for Automotive Electronics: Design Tips & Component Selection
Learn how to select AEC-Q200 qualified capacitors for automotive ECUs, ADAS, and BMS designs. Covers derating, flexible termination, and dielectric selection for 150C operation.
Capacitors Selection Guide: Key Parameters & Top Picks in 2026
A practical capacitor selection guide covering ESR, voltage derating, dielectric types, and the best MLCC and electrolytic picks for power, automotive, and RF designs.
Connectors for Motor Control: Design Tips & Component Selection
A practical guide to selecting connectors for motor control systems, covering current rating, EMI shielding, vibration resistance, IP sealing, and contact materials for reliable industrial drives.
Chip Resistors Selection Guide: Key Parameters & Top Picks in 2026
A practical chip resistors selection guide covering power rating, tolerance, TCR, and voltage specs, with top picks from Vishay Dale, Susumu, and Stackpole for 2026 designs.
FFC/FPC Connectors in 2026: Pitch, Actuator, and Sourcing Decisions
How to select FFC/FPC connectors from 0.25mm to 1.25mm pitch — comparing actuator types, contact plating, and top series from Hirose, Molex, JAE, Panasonic, and TE.
RF Inductors Selection Guide: Specs, Packages & Top Picks
How to choose RF inductors for matching networks, filters, and chokes — Q factor, SRF, wirewound vs multilayer. Top parts from Coilcraft, Murata, and Johanson.
Common Mode Chokes Selection Guide: Specs, Packages & Top Picks
Select common mode chokes for EMI filtering — impedance curves, current derating, PCB layout impact, and top parts from TDK, Wurth, Murata, and Coilcraft for 20
Temperature Sensors Selection Guide: Specs, Packages & Top Picks
Compare thermistors, RTDs, thermocouples, and digital temperature sensors — accuracy, range, interface, and top part numbers for every application.
Pressure Sensors Selection Guide: Specs, Packages & Top Picks
Selecting pressure sensors — gauge vs absolute vs differential, output type, pressure range, accuracy class, media compatibility, and top part numbers compared.
Humidity Sensors Selection Guide: Specs, Packages & Top Picks
How to choose humidity sensors — accuracy, response time, condensation recovery, I²C vs analog, and top models from Sensirion, TE, Bosch, and Honeywell.
Tactile Switches Selection Guide: Specs, Packages & Top Picks
Choose the right tactile switch — operating force, travel distance, lifecycle rating, IP rating, and top models from ALPS, C&K, Omron compared.
DIP Switches Selection Guide: Specs, Packages & Top Picks
How to select DIP switches — position count, pitch, actuator style, contact plating, top brands like C&K, Grayhill, Omron, and practical PCB layout tips.
TCXO Selection Guide: Specs, Packages & Top Picks for Precision Timing
How to select a temperature-compensated crystal oscillator — frequency stability, phase noise, clipping sine vs. CMOS output, and the best TCXO parts for GNSS,
OCXO Selection Guide: Specs, Packages & Top Picks for Ultra-Stable Frequency References
Everything you need to know about oven-controlled crystal oscillators — stability classes, warm-up behavior, phase noise fundamentals, and the best OCXO parts f
MHz Crystals Selection Guide: Specs, Packages & Top Picks
How to select MHz crystals for your design — frequency tolerance, stability, load capacitance, package options, and top part numbers compared.
Op-Amps Selection Guide: Specs, Packages & Top Picks
Op-amp selection guide for hardware engineers — GBW, slew rate, noise, rail-to-rail, supply current. Top part numbers from TI, ADI, ST, Microchip for common amp
ADCs & DACs Selection Guide: Specs, Packages & Top Picks for Data Conversion
Choose the right ADC or DAC for your design — resolution vs. ENOB, sampling rate, SAR vs. delta-sigma architectures, and the best converter ICs for common appli
Chip Resistors Selection Guide: Specs, Packages & Top Picks
Chip resistor selection beyond just ohms — package size, power rating, tolerance, TCR, and voltage rating. Top series from Yageo, Panasonic, Vishay, Samsung wit
Current Sense Resistors Selection Guide: Specs, Packages & Top Picks
How to select current sense resistors — 2-terminal vs 4-terminal, resistance range, TCR, power rating, and top series from Vishay WSL, Susumu KRL, Rohm PMR, Bou
Precision Resistors Selection Guide: Specs, Packages & Top Picks
Selecting precision resistors for analog circuits — tolerance, TCR, long-term stability, noise. Thin-film vs metal foil vs wirewound. Top picks from Vishay Foil
Board-to-Board Connectors Selection Guide: Specs, Packages & Top Picks
Engineer's guide to board-to-board connectors covering pitch, stack height, pin count, and top series from Hirose, Samtec, Molex — with 2026 lead time data.
Wire-to-Board Connectors Selection Guide: Specs, Packages & Top Picks
Practical guide to wire-to-board connectors — pitch, current rating, wire gauge, and top picks from JST, Molex, TE, Hirose. Covers crimp vs. IDC tradeoffs and 2
FFC/FPC Connectors Selection Guide: Specs, Packages & Top Picks
FFC vs FPC connectors explained — pitch, actuator type, contact position, and top series from Hirose, Molex, TE. ZIF vs non-ZIF tradeoffs, 2026 availability.
Tantalum Capacitors Selection Guide: Specs, Packages & Top Picks
How to choose the right tantalum capacitor for your design — voltage derating rules, ESR considerations, package sizes, and failure modes every engineer should
Diodes Selection Guide: Rectifier, Schottky, Zener, TVS — Key Specs and Popular Parts
Choosing the wrong diode type causes power supply failures and ESD damage. Complete guide to rectifier, Schottky, Zener, and TVS diodes with Chinese alternatives.
Resistor Types Guide: Carbon Film vs Metal Film vs Wire Wound vs SMD
Complete resistor selection guide. Learn which type to use for each application — precision, high-power, high-frequency — with popular part numbers and Chinese alternatives.
AI Chip & Accelerator Guide 2026: NPUs, GPUs, Edge AI Processors — Selection and Sourcing
AI chip landscape 2026 — NVIDIA H200/B200, Hailo-8, Google Edge TPU, Rockchip NPUs, and Chinese AI accelerators compared. Selection guide for cloud training, edge inference, and embedded AI.
Connector Selection Guide: JST, Molex, TE — Pin Pitch, Current Rating & When to Choose Which
JST, Molex, TE connectors comparison guide. Pin pitch, current rating, wire gauge, and applications for XH, PH, GH, Dupont, and more.
Op-Amp Selection Guide: 8 Most Popular Types and When to Use Each
From LM358 to OPA2134 — understand the 8 most popular op-amp types, their key specs (GBW, slew rate, noise), and how to choose the right one for your design.
Capacitor Types Guide: Ceramic vs Electrolytic vs Tantalum vs Film
Complete capacitor selection guide. Ceramic, electrolytic, tantalum, film — differences, derating rules, MLCC shortage alternatives, and Chinese capacitor brands.