PEI-Genesis Q&A | Push-Pull Connectors

Connectors play a critical role in virtually every industry. From connectors that need to be able to withstand the intense heat and vibrations of a Falcon 9 rocket to the connectors necessary to ensure reliable operation for lifesaving medical equipment, connectors are crucial components.

We reached out to our partners at PEI-Genesis to learn more about the importance of a specific connector type known as push-pull connectors and how they are utilized in the medical field.

To start, what is a push-pull connector? What makes it distinct from other connectors?

PEI-Genesis: A push-pull connector is a circular connector that offers an alternative mating style to the standard threaded or bayonet locking systems. Sometimes called a quick connect / disconnect connector, this type of connector is mated by simply pushing the plug axially into the socket. Once the self-latching system is fully mated by this “push” the mated pair will stay firmly latched. A pull on the cable behind the plug will engage the latch system, and not allow the connectors to become unmated. To disengage the pair, one simply “pulls” the outer sleeve of the plug, which pushes down the latching system, and allows for an easy separation of the plug and receptacle.

Within the category of push-pull connectors, are there different kinds? And how do they differ from one another?

PEI-Genesis: One of the main differences between different push-pull connectors is the latching styles employed. At its simplest, a push-pull connector means a push to mate, pull to break interconnect. Some of the more common latching styles include the notch and groove self-latching style as seen in the Lemo B Series connector, finger style latching system, or press-fit non-latching style break-away connectors. In addition to the latching systems, push-pull connectors have lots of key features to consider including number of contacts, contact size and type, temperature ratings, Ingress Protection, shielding capability just to name a few.

When should an engineer consider using push-pull connectors over other types?

PEI-Genesis: A push-pull connector can be used for any application requiring high reliability and top tier quality. Push-pull connectors offer a long life, and high mating cycle contacts. They are suitable for high vibration and shock environments and offer robust EMC protection. The matte chrome plating typical of the Lemo B, K, and S Series provides a clean and attractive aesthetic expected for any medical application. Multiple key options and possible color coding also prevent incorrect mating of similar connectors on the same panel.

How are push-pull connectors implemented in the medical field? What are some common use cases for them?

PEI-Genesis: Push-pull connectors offer high reliability and quality making them the perfect connector option for critical medical applications. The high mix of insert configurations and shell sizes give them a large offering to meet medical requirements in the field. They can be commonly found in electrosurgical devices, pacemakers, hearing devices, ventilators, anesthesia and diagnostic monitors and analyzers, and dental equipment.

With the push to increase production of medical equipment during the pandemic, have you seen an increase in demand for these connectors recently? If yes, is the demand being driven by the pandemic alone or are there other factors at play?

PEI-Genesis: There has certainly been an uptick in interest in the medical field, and therefore the demand for push-pull connectors is growing. Although the pandemic certainly fuels this growth, the medical field is an ever expanding and growing industry.

Do you have any part recommendations for an engineer considering a push-pull connector in their next product?

PEI-Genesis: The Lemo B and K series connectors offer great reliability and incredible flexibility for numerous applications. The high number of insert configurations, and diverse contact offering give these standard lines immense breadth. The self-latching technology guarantees robust mating, and easy/quick separation when needed. With both sealed and unsealed options, and a multitude strain relief and other accessories these two lines can cover many of your connector needs!

Thanks to PEI-Genesis for answering our questions. Be sure to check out our past Q&As with PEI-Genesis here, and if you have a topic you’d like to see us discuss with PEI-Genesis, drop us a line at contact@octopart.com or on Twitter.