Molex compliant needle technology offers many advantages

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Molex , the world's leading provider of complete interconnect products, participated in the Innovation Forum at the 2012 electronica China 2012 in late March to showcase leading concepts, including the introduction of compliant needle technology.

The compliant pin is resilient and provides a reliable solderless crimp electrical connection to the substrate. When the pins are inserted into the plated through-hole (PTH), the conforming zone changes shape under pressure and the residual plastic stress creates a holding force. The compliant pin is typically used for power and signal contact and has been used in telecommunications backplanes since the 1970s and in consumer electronics in the 1980s. Until recently, Molex was the first to apply it to the automotive sector. Currently, Molex produces approximately 300 million compliant needles per month, which is approximately 30% of the company's global stitch production.

The compliant pin crimping technology has many advantages, including permanent connections and high reliability, which can withstand shock and vibration. In addition, the compliant pin connector can be used for the soldering and component faces of the PCB, allowing for double-sided PCB mounting (based on SMT or via). They can also be used for tin and tin/lead PCBs, and the integrity of the PCB with the components inserted can be tested before joining the connector .

Since the compliant pin connector does not require soldering, it offers several advantages, including no thermal stress on the connector, so ordinary plastic materials can be used, eliminating the cost of selective soldering. The surface of the connector interface is coated to maintain the same high quality, no slag, flux residue, tinning and cold soldering, and no harmful lead.

The most popular type of crimping compliant needle is called the eye of the needle (EON), which is relatively simple to manufacture and uses Molex proprietary alloys. It is Molex's lowest cost compliant pin and offers several advantages: high reliability and ease of installation in the final assembly; and simple tools and minimal control. Molex now has extensive field experience in EON connector solutions, including nine years of automotive experience, so it can develop automotive EON design guidelines based on laboratory data and existing designs.

Applications for EON compliant pin connectors in the automotive sector include body electronics, powertrain, telematics, infotainment, airbag control modules, engine compartments, gearboxes, and anti-lock braking systems. , ABS).

At present, Molex EON1.0, EON1.45 and EON1.80 connectors are widely used in automotive sensor modules, transmission control modules, power transmission control modules, connected distribution boxes, and power system control modules. In all applications, the PCB with the component inserted can be tested first and then the compliant pin.