Bird - The RF Experts

Provides an added layer of safety for Water-Cooled RF Terminations

The 8640A930-1, Load Protection Switch protects for Bird 3-1/8" flanged water-cooled Moduloads® by preventing RF power from reaching it before proper coolant flow has been established. This device protects the Moduloads from damage that can result in costly downtime.

It also simplifies the protection method by no longer requiring a connection between the Moduload’s interlock terminals to the RF Sources being measured. The Bird Protection Switch is an easy-to-use device that efficiently enhances the level of protection for Bird Moduloads.

product specifications:
Item No
Item Name
3-1/8” Flanged Load Protection Switch
Frequency Range
1 kHz to 120 MHz
Max Power
60kW @ 2MHz
20kW @ 60MHz
16kW @ 120MHz
Insertion Loss
0.05 dB max, up to 120 MHz (switch closed)
1:02:1 max, up to 120 MHz (switch closed)
Input DC Power
24 VDC from power supply (included)
Control Signal
Interlock from Moduload, 0.2A nominal
Green LED when switch is closed
3-1/8” flanged line section, 8.34” long
Hot Switching
Not recommended
compatible devices - Compatible Devices:
8630B Series
10 kW, Forced-Air Cooled Terminations