RF Contactors

The Commercial Radio Company Series 145-100 and 145-200 RF Contactors have been engineered with a background of years of experience in the manufacture and installation of special RF energy transfer devices, and are especially designed for high voltage radio frequency switching. They are also ideally suited to DC voltage switching in high voltage rectifiers circuits. Contactors require “holding” power and are designed to operate with a momentary application of control voltage. 

Two models with different voltage ratings in either SPDT or DPDT types are available. Standard contactors are supplied with four auxiliary switches... two "normally closed" for control of solenoid voltage and two "normally open" for operation of signal lamps or other related functions. Solenoids are wired for 240 volt 50-60 Hz operation but may be wired for 120 volts 50-60 Hz operation on special order (or may be rewired in the field). An outstanding feature of these contactors is their small size and compact design... with and length have been reduced to a minimum with no excess space occupied beyond adequate insulation
Requirements!

Heavy, channel shaped steel base and rugged construction assure alignment of working parts and operation with a minimum of maintenance. Unique construction with a balanced rotary armature permits the contactor to be mounted in any position -- a feature which also permits use under vibration and shock conditions.

Rubber mounting grommets minimize transmission of sound during the switching operation... positive contact is obtained through the mechanical advantage gained in the use of a toggle action linkage. The solenoids have ample power to assure positive, snappy action with a momentary application of voltage.

In normal use and service, the applied solenoid voltage is automatically disconnected by the “normally closed” microswitch at the time the rotating contact arm completes its movement. This automatic disconnect feature assures momentary application of voltage regardless of the “on” time of the external control switch. A convenient terminal board with the barriers is provided for connection to solenoids and auxiliary switches. Careful design consideration has been given to the shape, location and material of insulating members and metal parts to avoid heating, corona effects and flashovers.

145-100 Series

Overall Dimensions

7-7/8" long, 6-1/2" wide, 5-1/2" high

Maximum Contact Ratings

17 Kilovolts peak at 2 MHz; 30 Amps
(90° F. temperature rise over ambient)

Solenoid Ratings

Maximum Current  (withdrawn solenoid plunger)
4 Amps at 240 VAC

Duty Cycle
Momentarily "on" and 3-second "off"

Stock Contactors

145-200 Series

Overall Dimensions

10-1/2" long, 8-1/4" wide, 6-3/16" high

Maximum Contact Ratings

20 Kilovolts peak at 2 MHz; 30 Amps
(90° F. temperature rise over ambient)

Solenoid Ratings

Maximum Current  (withdrawn solenoid plunger)
8 Amps at 240 VAC

Duty Cycle
Momentarily "on" and 1-second "off"

Stock Contactors

Please note: Contactors with 120 VAC solenoids
and/or only two microswitches may be secured on special order.