Series Catalog Page - Dow-Key

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