Different applications require different power ratings and sizes: Max Current Common Applications Drones, IoT, small wearables KK 254 PC fans, Arduino, breadboards Micro-Fit 3.0 Servers, industrial power units Mini-Fit Jr. Motherboards, ATX power supplies Mega-Fit High-power industrial equipment 3. Where to Buy
You cannot simply search for "Molex connector" and expect a match. Use these steps to narrow it down: buy molex connectors
: Look for molded numbers on the housing. The first 5–6 digits typically indicate the series (e.g., 43025 is Micro-Fit 3.0). Use these steps to narrow it down: :
: Use a digital caliper to measure the distance between the center of one pin and the center of the next. Common pitches include 1.25mm (PicoBlade) , 3.0mm (Micro-Fit) , and 4.2mm (Mini-Fit Jr.) . Common pitches include 1
Buying requires precision, as "Molex" refers to a massive ecosystem of series rather than a single plug. To get the right part, you must identify the series , pitch , and circuit count before choosing a reputable distributor. 1. Identify the Exact Connector