The "PC", "MB" and "SW" contactors represent a novel dual approach to the requirements for DC contactors. On the one hand the expansion of Telecommunications Systems, UPS and other Power Conversion Systems has led to a demand for compact, easy installed and economically priced contactors which up until now have not been available.

With the introduction of the "PC60" and "MB60" contactors, this demand has now been effectively met. On the other hand the "SW60" range fulfills the requirements for more traditional DC contactor applications such as:

• switching or reversing small traction motors.
• hydraulic power packs.
• small electric winch motors, etc.

All the contactors are manufactured to a very high standard and employ best quality materials: phenolic contact housings, silver alloy contacts and Class H (180°C) winding wire for coils. Silver plated heavy current and gold plated light current components are also used on the "PC60" and "MB60" contactors

Type PC60

The "PC60", "MB60" and "SW60" are a new family of miniature direct current contactors and solenoid switches which are designed to fill the gap between 30Ampere relays and 100 ampere contactors.

 The family is divided into distinct branches, PC60/MB60 for printed circuit board mounting and SW60 free standing contactors and each has its own selection of variations and options.

Magnetic Blowouts (PC60-B, PC61-B and PC63-B)

The contactors can be fitted with magnetic blowouts for switching current at higher DC voltages (guide:      >60V for resistive loads and >48V for inductive loads). If the application calls for frequent switching under these conditions, it is recommended that a contact housing with open apertures is specified. This is available as a no cost option. When fitted with magnetic blowouts it is important that the correct polarity for the main terminal connections is observed.

A double circuit changeover 5 ampere microswitch auxiliary contact can be provided. This is fitted in a purpose designed holder with gold plated pickups for the microswitch terminals and pins for soldering direct to a printed circuit board.

These have closed contact housings, and are assembled with rubber gaskets to inhibit the ingress of moisture or other contamination. They are protected to IP66. These versions can be washed after soldering to the PC board and may be used in dirty or wet environments.
Please note: Contactors fitted with auxiliary contacts cannot be fully protected against unfriendly environments.

Normally the auxiliary contacts are supplied already fitted to the contactor but if the printed circuit boards are to be washed after soldering, the auxiliary contact is supplied separately and the contactor is temporarily sealed with a rubber plug which is removed after washing and the auxiliary contact is then fitted. The contactors are not therefore fully protected against the environment to the same degree as the PC60-P,   PC61-P and PC63-P.

To accommodate the "PC" contactors, printed circuit boards should be drilled in accordance with the Mounting Details. (PC mounting details)

Prior to soldering, the PC60, PC61 and PC63 can be secured to the circuit board by means of a M4 bolt which protrudes from the underside of the contactor. if the full current ratings of the contactors are to be utilized, the circuit board tracks should have the appropriate thickness and width of copper.

Conventional hand or wave soldering techniques can be used and if the circuit board is to be washed the appropriate PC60-P, PC61-P, PC63-P or PC60-A-W, PC61-A-W, PC63-A-W should be specified.

Type Number Ordering Codes

Type PC60A