OSSRD0004A Relays

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Solid state relays are a type of switching device whose output circuit is operated by an electrical control signal, as opposed to a mechanically actuated switch or relay. The OSSRD0004A is a three-phase solid state relay with input phase angle control, quick turn-off surge suppression, static zero-voltage crossing technology, and wide voltage range. The OSSRD0004A is ideally suited for controlling small electric motors, heating elements, industrial heating and lighting, and other industrial applications with high current levels.

The OSSRD0004A solid state relay utilizes zero crossing circuitry which minimizes inductive switching noises and increases the relays’ endurance to current surge during turn-off. This feature protects the relay control circuitry from damage caused by high inrush currents in the output load. This device also features high isolation voltage between the input and output circuits, eliminating cross-talk and interference with other electronic devices.

The OSSRD0004A utilizes an input control signal between 10 and 200 volts AC, depending on the part number and voltage range options. When the control signal is applied, the OSSRD0004A turns on and supplies current to the output load, up to a maximum of 600A at 600V. To turn off, the control signal is removed or decreased to zero.

The operating principle of the OSSRD0004A is based on semiconductor devices called thyristors. The OSSRD0004A utilizes rapid turn-off SCRS (silicon controlled rectifiers) which are able to quickly reduce the load current in a short time, providing better control of power through the output circuit. The OSSRD0004A is capable of regulating output currents in a closed loop, making it an effective tool for controlling loads with varying power needs.

The OSSRD0004A is a very versatile solid state relay, and is an excellent solution for a variety of motor control, electric heating, and lighting applications. The zero-voltage crossing technology, current surge protection, and wide voltage range make the OSSRD0004A an ideal choice for these applications.

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