521U-Series Data Sheet - Dow-Key

5 Million Cycle Switches
521U Series
Terminated SPDT/ Unterminated DP3T Switch
DC-26.5* GHz
Description:
The 521U Series is a break-before-make SPDT switch noted
for its 5 Million actuation life cycle and for its various RF
configuration options -- unterminated 2/3 (DP3T) switch,
SPDT with 2W or 5W internal terminations, and SPDT with
2W or 5W external terminations
The operational frequency range of the standard 521U switch
is from DC to 18 GHz but can be extended to 26.5 GHz with
the “K” option. The standard operating temperature of -25
°C to +65°C can be extend as well to -55 °C to +85°C with
the “T” option.
521U-230803
Environmental :
Operating Temperature*
-25 °C to +65°C
Storage Temperature
-55 °C to +85°C
Vibration (Operating)
10 G RMS, 50-2000 Hz
Mechanical Shock
(Non-Operating)
50 G, 1/2 Sine, 11 mS
The 521U switch is offered in failsafe, pulse latching, or
latching self cutoff models and is available with active high
or active low TTL operation. There is a choice of 12, 24,
or 28 Vdc coil voltage with a maximum switching time of
15 mS. This unit comes with SMA RF connectors and optional
indicator circuitry. For other available 521U designs, please
contact our factory.
* Extended operating temperature is available upon request
RF Characteristics :
Outline Drawing* :
Frequency
GHz
VSWR
(max)
Isolation
dB (min)
Ins. Loss
dB (max)
DC-1
1.10
85
0.10
1-4
1.15
80
0.15
4-8
1.20
70
0.20
8-12
1.30
65
0.30
12-18
1.35
60
0.35
18-26.5*
1.50
55
0.50
Seal
Epoxy Sealed
* "K" option only
Operating Voltages
12 Vdc ; 24 Vdc ; 28 Vdc
Switching Time (max)
15 mS
Actuation Data :
Operating Mode (types)
TTL Options
Failsafe
Pulse Latching
Latching Self Cutoff
TTL High (active high)
TTL Low (active low)
Mechanical :
RF Contacts
Break before make
Weight (nominal)
2.5 oz. (70.9 g.)
Design Life (cycles)
5,000,000
v. 05/08
* Based on 521U-230803
Microwave Products
4822 McGrath Street, Ventura, CA 93003
Tel: (805) 650-0260 Fax: (805) 650-1734
Visit us at www.dowkey.com