531-561 Series Normally Open Terminated, SMA The DowKey Microwave 3 to 6 Position Normally Open switch is a multi-position electro-mechanical coaxial switch with SMA connectors. The RF characteristics are excellent over the DC-18 GHz frequency range. Options include extended frequency range up to 26.5 GHz, a “D” type control connector, moisture seal, indicator contacts, suppressions diodes, special operating voltages, and TTL or BCD compatibility. Also available are BMA (Blind Mate) connectors which provide quick installation into modular plug-in systems operating to 18 GHz. The BMA connectors mate with OSP* female connectors. *OSP is a registered trademark of M/A COM Omni-Spectra, Inc. DowKey® 531-561 Series Normally Open Terminated, SMA Typical applications for the 531-561 Series include: • Automatic Test Equipment • Switch Matrixes • Multi-Band or Alternate Source Selection RF Characteristics Specifications : Operating Voltage: (across temperature range) 12 Vdc (11-14 Vdc) 28 Vdc (24-32 Vdc) Coil Current (Nominal): 12 Vdc 324 mA 28 Vdc 140 mA Switching Time: 15 mS maximum Operating Temperature: -25ºC to +65ºC Mechanical Life, Cycles: 1 x 106 minimum Nominal Weight: 11.0 oz., (312g.) Frequency GHz VSWR (max) Isolation dB (min) Ins. Loss dB (max) RF Power Watts (CW) DC-4 4-8 8-12 12-16 16-18 1.25 1.35 1.40 1.50 1.60 70 65 60 60 60 0.20 0.30 0.40 0.50 0.50 100 70 60 50 45 Connectors and Part Numbers Nominal Coil Voltage Connector Type SP3T Switch Configuration SP4T SP6T 12 Vdc 28 Vdc SMA SMA 531-520803 531-530803 541-520803 541-530803 561-520803 561-530803 531-520823 531-530823 541-520823 541-530823 561-520823 561-530823 Normally open with TTL Compatible Logic 12 Vdc SMA 531-520803A 28 Vdc SMA 531-530803A 541-520803A 541-530803A 561-520803A 561-530803A Normally open with Indicators, TTL Compatible Logic 12 Vdc SMA 531-520823A 541-520823A 28 Vdc SMA 531-530823A 541-530823A 561-520823A 561-530823A Normally open with indicators 12 Vdc SMA 28 Vdc SMA 32 DowKey Microwave Corporation 1667 Walter Street, Ventura, California 93003 (805) 650-0260 • FAX (805) 650-1734 531-561 Series Mechanical Available Options Electrical Moisture Seal 9 or 15 PIN “D” Plug BCD Decoding Circuit Operating Voltages: 15, 20, 24 Vdc -55°C to +85°C Operation Normally Closed, Position 1 BMA Connectors 33 DowKey Microwave Corporation 1667 Walter Street, Ventura, California 93003 (805) 650-0260 • FAX (805) 650-1734