Compact DC centrifugal fans (also called miniature DC blowers) provide significantly higher static pressure than similarly-sized DC axial fans, making them the preferred choice for applications requiring air to flow through narrow channels, across heat sinks, or into constrained spaces. Frame sizes typically range from 30mm to 90mm in diameter, with impellers designed to deliver compressed airflow on 5V, 12V, or 24V DC power. Compact DC centrifugal fans are widely used in medical equipment (respiratory devices, endoscope cooling), portable projectors, automotive electronics (infotainment systems, electric battery cooling), and high-performance computing applications where airflow must be directed through specific paths. Important selection parameters include maximum static pressure, airflow curve, noise level, bearing type, and whether PWM speed control or tachometer feedback is needed. Leading manufacturers include SUNON (PMD and B series DC blowers), ebm-papst (micro blower range), Sanyo Denki (San Ace DC blowers), and Fulltech. Hengrui offers the complete range with cross-reference assistance for replacement parts and competitive wholesale pricing.
Bag
Bag packaging indicates that a specified quantity of product is packaged by the manufacturer in a bag, sealed pouch, or similar container and sold as a unit without repackaging. It is also used to describe kits/assortments where components are packaged in separate bags according to part number or parametric value, rather than in a compartmentalized box or similar rigid container.