Mini-HMC™ Rectangular Industrial Connector System Molex Mini-HMC™ Rectangular Industrial Connector System is designed for smaller industrial robotic applications that require the ruggedness of traditional heavy duty connectors but in a small form factor. Mini-HMC connectors are also ideal for many applications requiring a rugged, high pin count solution. The connector system is environmentally sealed with an IP65 rating to prevent the ingress of dust and water when mated.