Normalising PCB Copper Busbar Resistance to 20°C: Method and Limits
Calculate a 20°C reference resistance for copper, document measurement conditions, and understand why brass and mixed-ma...
Guide | Technical Guides & Company Updates — Page 10
Explore Hongchuan Metals technical guides, product information and company updates. Review PCB busbar, solder terminal and SMT nut selection considerations alongside the product catalog.
PCB Busbar Short-Circuit Forces: Peak Current, Spacing and Support Checks
Estimate magnetic force with a parallel-conductor model, distinguish peak current from I²t, and define support and post-...
Does Passing AQL Inspection Mean Zero Defects? Sampling Stamped Parts
Distinguish AQL, sample size and acceptance number, use a zero-acceptance example to explain residual risk, and define a...
Differential Expansion in Copper–Aluminum Connections: Calculate Movement First
Estimate free differential movement with ΔL=αLΔT, distinguish it from joint stress and bolt preload, and prepare inputs ...
Choosing Screw Length for an SMT Nut: Engagement, Bottoming and Tolerances
Calculate minimum and maximum screw penetration from stack tolerances, distinguish blind and through threads, and check ...
Testing PCB Terminal Solderability: Dip, Reflow and Wetting-Balance Methods
Choose a solderability method for leaded or surface-mount terminals, distinguish comparative wetting data from acceptanc...
Can an AC Copper Busbar Use a DC Rating? Skin Depth and Proximity Effects
Calculate copper skin depth at 50 Hz, 400 Hz and 20 kHz, then identify the geometry, current spectrum and thermal checks...
First-article inspection for stamped parts: revision, key dimensions and deviations
Tie each first-article sample to the controlling drawing revision and recorded measurements. AS9102C applies when the co...
Custom stamping RFQ checklist: drawing, material, volume and inspection needs
Prepare a controlled drawing, material condition, critical dimensions, finish, quantities and inspection expectations be...
How to inspect a wire-terminal crimp: height, conductor position and pull testing
Crimp height belongs to a specific terminal, wire and tooling combination. Visual, dimensional and pull checks reveal di...
C11000 copper or C26000 brass for a busbar? Compare conductivity and forming needs
C11000 copper and C26000 brass differ substantially in published conductivity. Selection also depends on strength, formi...
Copper strip bend radius: temper, thickness and bend direction
There is no universal minimum bend radius for every copper strip. Check alloy, temper, thickness and bend direction, the...