77 Series - Dow-Key

77 Series SPDT Switch
These medium size, light-weight relays are designed and manufactured
with gold plated RF contacts and silver plated outer conductors which
give good RF performance to 1 GHz (Isolation is greater than 30 dB,
Insertion loss is less than 0.15 dB). Available with either 50 Ohm BNC
connectors or 75 Ohm type “F” connectors, the “T” shaped configuration has the common connector at one end of the RF cavity block and
the N/O and N/C connectors 180° apart on the opposite end. Other
options include type TNC connectors.
Typical applications for the 77 Series include:
• Military Communications
• Commercial and Industrial Communications
• CATV/MATV/CCTV Switching
DowKey® 77 Series
SPDT Switch
RF Characteristics
Specifications :
Operating Voltage:
(across temperature range)
12 Vdc (11-14 Vdc)
26.5 Vdc (24-32 Vdc)
Coil Current (Nominal):
12 Vdc 171 mA
28 Vdc 96 mA
Operate Time:
35 mS maximum
Operating Temperature:
0ºC to +65ºC
Mechanical Life, Cycles:
1 x 106 minimum
Nominal Weight:
3.5 oz., (99g.)
Frequency
MHz
VSWR
(max)
Isolation
dB (min)
Ins. Loss
dB (max)
RF Power
Watts (CW)
50
100
400
1,000
1.05
1.10
1.20
1.50
50
45
40
30
0.03
0.04
0.10
0.15
150
100
75
50
Connectors and Part Numbers
Nominal Coil
Voltage
Connector
Type
Standard
SPDT
SPDT wit 1 “C”
Aux. Contact
12 Vdc
26.5 Vdc
115 Vac
BNC
BNC
BNC
77-2202
77-2302
77-2602
77-220232
77-230232
77-260232
12 Vdc
26.5 Vdc
115 Vac
F*
F*
F*
77-2232
77-2332
77-2632
77-227242
77-237242
77-263242
* Not recommended for use with RG-6 cable.
78
DowKey Microwave Corporation
1667 Walter Street, Ventura, California 93003
(805) 650-0260 • FAX (805) 650-1734
77 Series
Mechanical
Electrical
79
DowKey Microwave Corporation
1667 Walter Street, Ventura, California 93003
(805) 650-0260 • FAX (805) 650-1734