WR-SMP Miniature Connectors Würth Elektronik WR-SMP Miniature Connectors offer both slide-in and snap-on features, which provide a fully compatible interconnect application up to 40GHz. The SMP connector interface is in accordance with MIL-STD-348 and is intermateable with GPO. Würth Elektronik offers a full range of SMP connectors from PCB connectors, cable connectors, bullet adapters, to pre-assembled cable assemblies with 0.47' and 0.85' for both flexible and hand-formable cables.