K&L Microwave 6MP-28-F-0-4 SP6T Coaxial Relay Indicator Switch 18 GHz SMA

K&L Microwave 6MP-28-F-0-4 SP6T Coaxial Relay Indicator Switch 18 GHz SMA

The K&L Microwave 6MP-28-F-0-4 is a single pole, 6-throw (SP6T) coaxial relay designed for RF and microwave signal switching applications. It routes one common RF input to any one of six output ports and features an integrated indicator switch — electrically insulated from the RF coaxial path — that shows which throw position has been energized, without confirming that the RF switch has physically transferred. K&L Microwave, based in Salisbury, Maryland, is a well-established U.S. manufacturer of precision microwave filters, multiplexers, and switching components.

Specifications & What's Included

• Model: K&L Microwave 6MP-28-F-0-4
• Configuration: Single Pole, 6 Throw (SP6T)
• Estimated Frequency Range: DC to 18 GHz
• Connector Type: SMA Female (J1–J6 throw ports + common port)
• Total Ports: 7 (1 common + 6 throw)
• Indicator Switch: Yes — insulated from RF path; indicates energized throw position
• Form Factor: Cylindrical stainless body with 4-hole flange mount base
• Country of Manufacture: United States (Salisbury, MD)
• Terminal connections visible on top of body (solder lug style for control/indicator wiring)

Applications

SP6T coaxial relays like the K&L 6MP-28-F-0-4 are used in RF signal routing and switching systems where one source must be selectively connected to multiple paths — common in automated test equipment (ATE), microwave bench setups, antenna switching, radar, and communications test systems. The indicator switch function is particularly useful in ATE and monitoring applications where software or control logic needs to confirm the relay's commanded position. K&L Microwave relays of this type are found in defense electronics, satellite ground stations, and laboratory RF test systems requiring reliable switching across a wide microwave frequency range. The SMA connector interface and flange-mount form factor are standard in rack-integrated and chassis-mounted RF subsystems. This style of relay dates from the era of precision mechanical coaxial switching widely adopted from the 1980s onward for high-frequency signal management, and remains in active use today in both legacy system maintenance and new RF test bench builds.