IN Brief:
- MiniMix combines up to 15A power delivery and 1Gbps 1000BASE-T1 Ethernet in one interface.
- Its 5.65mm routing profile is intended for joints, actuators, articulated limbs, and end effectors.
- Samples are available now, with full commercial production scaling planned for late 2026.
Molex has introduced its MiniMix hybrid connector family, combining up to 15A power delivery and 1Gbps 1000BASE-T1 Ethernet within a 5.65mm routing profile for humanoid robots, autonomous mobile robots, and compact industrial automation.
The platform includes wire-to-board connectors and pre-terminated cable assemblies in vertical and right-angle orientations. Molex is targeting joints, actuators, articulated limbs, and end effectors where separate power and signal interfaces consume space and complicate final assembly.
MiniMix is intended to replace some manually routed and hand-soldered connections with an integrated, pre-terminated interface. Molex says the connector can pass through openings as small as 5.65mm and requires up to 50% less routing area than alternative options, although that comparison has not been independently verified.
Brian Hauge, president and senior vice-president of Consumer and Commercial Solutions at Molex, said: “Humanoid robot manufacturers are rapidly moving from prototype builds to commercial mass production, but traditional joint wiring methods create major manufacturing bottlenecks. MiniMix replaces tedious manual assembly with an integrated solution for power and signal transmission, freeing robotics designers to build sleeker, lighter and more responsive autonomous systems at scale.”
A robotic joint concentrates several electrical functions inside a moving mechanical assembly. Motors and actuator drives need meaningful current, while position sensors, encoders, cameras, and local controllers require dependable data links. The harness must fit around bearings, gearboxes, and structural members without restricting movement or transferring excessive strain to the connector and printed circuit board.
Separate interfaces can simplify electrical partitioning, but they increase connector count, harness volume, and assembly steps. Where connector bodies cannot pass through an actuator channel, manufacturers may have to thread individual wires before terminating them by hand. That approach can support prototype volumes, although process control becomes more difficult as output rises.
MiniMix allows a cable assembly to be terminated and tested before it reaches final robot assembly. Continuity, pin assignment, crimp quality, and insulation can therefore be inspected in a controlled harness process, reducing the number of operations carried out inside a partly assembled joint.
The use of 1000BASE-T1 is also relevant. Single-pair Ethernet carries bidirectional data over one twisted pair and is already used in automotive and industrial systems where cable mass and routing space are constrained. A common Ethernet physical layer can support distributed sensors and controllers without adding a conventional four-pair cable to every joint.
Combining power and data does not remove the need for careful separation, shielding, and return-path design. Motor currents and switching edges can inject noise into nearby communication circuits, while the data pair must maintain controlled impedance through the connector and cable. Cable routing, grounding, and termination quality will determine whether the nominal 1Gbps link remains reliable under motion.
The 15A rating also depends on application conditions. Contact temperature, conductor size, ambient temperature, loaded-circuit count, airflow, and mating resistance all influence the current that can be carried continuously. Molex’s launch material does not disclose derating curves, contact resistance, mating-cycle life, ingress protection, or detailed vibration and flex-test results.
Vertical and right-angle orientations give board designers alternatives for managing cable exit and bend radius. The mechanical layout matters because repeated movement can damage a cable near the connector even when the contacts remain electrically sound. Strain relief and harness anchoring therefore form part of the reliability design rather than an installation detail.
Molex says samples and functional evaluation assemblies are available now, with full commercial production scaling planned for late 2026. The evaluation phase should give customers an opportunity to test thermal rise, signal integrity, vibration, retention, and flex endurance within representative joints.
MiniMix addresses a specific production constraint rather than the complete robotics interconnect problem. Its commercial value will depend on whether the compact geometry can maintain power, data, and mechanical performance across repeated movement while remaining straightforward to assemble and service at scale.
