The single pole 100A contactor, SPST-NO contact form, has been designed for direct current loads, particularly for electric vehicles, telecommunication equipment, car batteries, trains, ships, and electronic control systems.

Features

• 100 amps rated load current of contact circuit.
• 12V, 24V, 48V DC coil rated voltage for selection.
• Continuous operation duty.
• Easy and quick installation, available anyway to install.
• Mechanical life up to 300 thousand times.

Specifications

DC Contactor Circuit Diagram

Installation Diagram (Unit: mm)

Tips: Contactor series and parallel connection

Many power consumption equipment are single-phase loads, therefore, several poles of the multipole contactor can be used in parallel, such as the electric resistance furnace, and welder transformer. When several poles are used in parallel, a small-capacity contactor can be selected. However, it has to be noticed that the heating current of the parallel contactor is not completely proportional to the number of parallel poles. Because the resistance value of moving and static contact loops may not be equal, thus the flowing current may not the averagely distributed. Therefore, the current could only be increased by 1.8 times for bipolar parallel and by 2～2.4 times for triode parallel.
Moreover, various polar contacts can't connect or disconnect at the same time after a parallel connection, so the connection and breaking ability can't be improved.
Sometimes, several contacts of the contactor can be used in series. Due to the increase of contact fracture, the arc is divided into many segments, thus improving the arc extinguishing ability and accelerating arc quenching. When several contactors are connected in series, the working voltage could be enhanced, but it can’t exceed the rated insulation voltage. Agreed heating current and rated working current of the contactor would not change after a series connection.