MM Microwave Coaxial Connectors Murata MM Microwave Coaxial Connectors are small connectors with a switch. These connectors feature 50Ω nominal impedance and 500MΩ minimum insulation resistance. The MM8830 connectors are SWJ type and offer connector durability of 50 cycles with a probe. These MM8830 connectors have applications in electrical characteristics measurement of microwave circuits for cellular phones and small wireless equipment such as wearable equipment.