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Smiths Interconnect, D Series
Why contact technology matters in sterilized environments Repeated autoclave exposure—commonly reaching temperatures around 250 °F (121 °C) for extended du- rations—introduces thermal stress, moisture ingress risk, and material fatigue. Traditional contact designs can lose spring force over time, leading to increased contact resistance or intermittent connections.
Medical devices: reliability under sterile, repetitive stress Medical equipment presents a unique harsh-environ- ment challenge. In addition to mechanical reliability and electrical performance, connectors must withstand re- peated sterilization, strict size constraints, and intuitive operation in clinical settings where ease of use directly impacts patient safety. One real-world example comes from the field of elec - trophysiology, where a medical device manufacturer sought an alternative to traditional high-cost, auto- clave-compatible connector solutions. The application involved electrophysiology catheters used to map the electrical activity of the heart to detect arrhythmias. These minimally invasive procedures access the heart through a small incision—typically in the groin—thread- ing a disposable catheter through blood vessels rather than relying on open-heart surgery. The approach sig- nificantly reduces patient recovery time, but it places demanding requirements on the supporting hardware. In this case, the connector needed to support up to 82 contacts in a compact form factor, deliver consistent electrical performance, and survive multiple autoclave sterilization cycles without degradation. Ease of use was equally critical, as clinicians rely on fast, reliable connections in time-sensitive environments. “In medical devices, connector failure doesn’t just mean downtime,” one biomedical engineer explained. “It means repeat- ing procedures, delaying diagnoses, or compromising workflow in the lab.” Smiths Interconnect’s D Series is designed to withstand up to 20 autoclave cycles. Utilizing a high strength poly- mer for both the plug and receptacle, the D Series is selectively loaded with up to 82 hyperboloid contacts, allowing conformity to most device requirements.
Hyperboloid Technology
In applications like this, contact geometry becomes as important as materials and sealing. Technologies used by Smiths Interconnect, such as its hyperboloid contact design, distribute contact force across multiple points rather than relying on a single beam or spring. This multi-point engagement helps maintain consistent electrical performance even after repeated sterilization cycles. “In healthcare, reliability has to be repeatable,” a design engineer noted. “A connector that survives one sterilization cycle isn’t enough, it has to survive multiple cycles without changing behavior.” In addition to sterilization and reliability, many medical devices also face extreme space constraints, particularly in portable diagnostic equipment, wearable systems, and minimally invasive tools. In these applications, con- nectors must deliver reliable signal performance while occupying as little physical space as possible.
Omnetics, Nano-D Series
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