MMCX Jack for RF Chains That Can't Tolerate Magnetic Materials
The 908-NM22109 is an SV Microwave MicroMate™ series MMCX jack (female socket) built around a non-magnetic beryllium copper body and center contact — a deliberate material choice for applications where ferromagnetic interference or MRI compatibility is a hard requirement. The snap-on fastening gives a positive tactile lock without the rotation of a threaded interface, and the 500-cycle mating life means it can survive field-service reconnects without degrading the RF launch.
What the Non-Magnetic Build and BeCu Body Mean for Signal Integrity
Most MMCX connectors use a brass body with nickel underplate. The 908-NM22109 replaces that with beryllium copper throughout — body and center contact — and plates it in gold. Beryllium copper retains its spring temper after repeated snap-on cycles better than phosphor bronze or brass, which directly supports the 500-cycle rating. The non-magnetic property (permeability near 1.000) eliminates the risk of the connector being drawn into a strong magnetic field or distorting the field itself, which is why this part gets specified for MRI receiver coils, NMR probes, and particle-detector front-ends.