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Siemon Jacks Crowned King of PoE

Siemon jack with crown

In an effort to improve the electrical and mechanical performance of its jacks, Siemon invented and patented a curved or "crowned" contact shape for its MAX® and Z-MAX® RJ-45 jacks and its TERA® jacks. In additional to achieving the industry's highest transmission performance and eliminating the risk of permanent contact deformation due to mechanical stress, Siemon’s patented crowned jack contacts provide superior support for remote powering applications.

Unmating a jack-plug connection under a PoE load produces an arc that erodes the gold plated jack-plug contact surfaces at the arcing location. When this erosion occurs in the area of the fully mated position, the result is an unreliable connection. Only Siemon’s crowned jack contact geometry places arcing damage to both the plug and jack contacts away from the final mated position—allowing you to connect and disconnect to the latest PoE applications with zero risk. Learn more about the effects of erosion.


Other Jacks... Damaged Fully Mated Position

Siemon... Undamaged Fully Mated Position

Every day, the Internet of Things (IoT) places more PoE-enabled devices on the network—everything from IP phones and surveillance cameras, to wireless access points, building automation devices and LED lighting. As PoE standards continues to advance for higher power delivery over all four pairs of a network cable, it’s time to pull the plug on inferior connections and choose Siemon’s patented crowned contact geometry—it’s what makes our jacks King of PoE.


The Effects of Spark Gap Erosion Caused by Unmating Under PoE Load

Unmating a jack-plug connection while transmitting PoE power produces an arc that creates an electrical breakdown of gases that erodes the plated jack and plug contact surfaces at the arcing location. When this erosion then occurs in the area of the fully mated position, the result is an unreliable connection that can cause degraded network performance and increased bit error rates.

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Learn more about the effects of PoE and how to eliminate the risks

Download these informative resources today!


White Paper: Advantages of Using Siemon Shielded Cabling Systems To Power Remote Network Devices

Third Party Test Report to IEC 60512-99-001 - Z-MAX and TERA

Third Party Test Report to IEC 60512-99-001 - MAX


Overview: Siemon Jacks Crowned King of PoE

Overview: The Effects of Spark Gap Erosion Caused by Unmating Under PoE Load


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