531-561 Series Latching Terminated, SMA The DowKey Microwave 3 to 6 Position Latching Terminated switch is a multi-position electro-mechanical latching coaxial switch with suppression diodes, a solid state self cut-off circuit, and 2 Watt, 50 Ohm internal terminations.. Utilizing SMA connectors, the RF characteristics are excellent over the DC-18 GHz frequency range. Options include 5 Watt terminations, a “D” type control connector, moisture seal, indicator contacts, 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. Typical applications for the 531-561 Series include: • Automatic Test Equipment • Switch Matrixes • Multi-Band or Alternate Source Selection DowKey® 531-561 Series Latching Terminated, SMA Specifications : Operating Voltage: (across temperature range) 12 Vdc (11-14 Vdc) 28 Vdc (24-32 Vdc) Coil Current (Nominal): 12 Vdc 414 mA 28 Vdc 177 mA Switching Time: 15 mS maximum Operating Temperature: -25ºC to +65ºC Mechanical Life, Cycles: 1 x 106 minimum Nominal Weight: 10.0 oz, (283 g) RF Characteristics 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 Power handling capability is for through path only. Internal termination is limited to 500 milliwatts dissipation. Connectors and Part Numbers Nominal Coil Voltage Connector Type SP3T Switch Configuration SP4T SP6T 12 Vdc 28 Vdc SMA SMA 531-420803 531-430803 541-420803 541-430803 561-420803 561-430803 Latching with Self Cut-Off, Indicators 12 Vdc SMA 531-420823 28 Vdc SMA 531-430823 541-420823 541-430823 561-420823 561-430823 Latching with Self Cut-Off, TTL Compatible Logic 12 Vdc SMA 531-420803A 28 Vdc SMA 531-430803A 541-420803A 541-430803A 561-420803A 561-430803A Latching with Self Cut-Off, Indicators, TTL Compatible Logic 12 Vdc SMA 531-420823A 541-420823A 28 Vdc SMA 531-430823A 541-430823A 561-420823A 561-430823A 36 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 BMA Connectors 37 DowKey Microwave Corporation 1667 Walter Street, Ventura, California 93003 (805) 650-0260 • FAX (805) 650-1734