For hardware startups and OEMs, getting high-quality PCBs quickly and reliably is critical. MC PCB is a one-stop contract PCB manufacturer supporting prototypes to volume builds—backed by experienced engineering support and rigorous QA.
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No. 2, Lane 11, Wenming Road, Fourth Industrial Zone, Nanzha, Humen Town, Dongguan City




OEM Power Supply PCB Assembly With Relays And Transformer
this power supply pcb integrates a transformer, relays, and protection parts to deliver stable switching and control, built for oem prototype-to-production needs.
this assembled circuit board is a practical example of a power and control module that is ready for real-world duty cycles. the layout combines a transformer section for power conversion, relay outputs for switching loads, and filtering components that help reduce ripple and electrical noise. that balance matters in equipment where stable output and predictable switching are more important than raw miniaturization.
from the image, you can see through-hole and smt parts working together: larger components like relays, inductors, and capacitors handle energy storage and switching stress, while smt devices manage signal conditioning and control. the board also includes multiple connectors and mounting holes, which simplifies installation and service in industrial enclosures, appliances, and automation systems.
for b2b buyers, an oem pcb partner can support the full path from prototype builds to volume: dfm review to improve assembly yield, bom sourcing to control cost and lead time, and process controls such as aoi inspection, hi-pot or insulation checks when required, and functional testing matched to your load conditions. the result is a manufacturable, service-friendly power supply pcb assembly that scales cleanly as your product moves from validation to mass production.
MC PCB.,Ltd, alongside Dongguan MaoChang Printed Circuit Board Limited,has focused on PCB manufacturing over 20 years. MaoChang Printed Circuit Board Limited, a professional PCB factory for Quick Turn PCB, Prototype PCB and High Mix Low Volume fabrication. With UL certification for Rigid FR-4 / High Frequency / Aluminum Based PCB production.
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