SDS.25S220A Industrial Controls

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Time Delay Relays provide voltage or current control for applications that require a delay before switching or a precise off-delay. The SDS.25S220A, a solid state step-core relays for time delayed switching, is widely used in industrial, automotive, and consumer applications. Its key features include high accuracy of 0.01%, rated currents of 25A at up to 220V AC, and adjustable time ranges from 0.5ms to 59s.

The SDS.25S220A consists of two main components - a step-core relay and a solid state timer. The step-core relay controls the connections of the primary circuit and the load, while the solid state timer controls the on and off time delay of the primary circuit. The timer is a unique combination of a voltage-controlled capacitor discharge circuit and a solid state output SCR. As the timer is voltage-controlled, the operating voltage can be externally regulated, allowing for precise control of the time delay.

The SDS.25S220A is widely used for motor control in applications such as air-conditioners, pumps, and compressors. In motor control applications, the SDS.25S220A can be used to control the start and stop times of motors, thereby making them more efficient and reliable. The SDS.25S220A can also be used to provide a timing control for various electrical control and circuit protection devices that need to have time delay functions. For example, it can be used to control the opening and closing of contacts of protective relays, the activation and de-activation of switches, and the shut-off of automatic control devices.

The SDS.25S220A can also be used in applications such as lighting control, time delay switching, and overload protection. In lighting control applications, the SDS.25S220A can be used to switch on and off lighting fixtures, such as street lights, automatically based on a predetermined time delay setting. In time delay switching applications, the SDS.25S220A can be used to switch circuits off or on after a predetermined amount of time. In overload protection applications, the SDS.25S220A can be used to trip a switch or circuit breaker automatically after an overload condition.

The SDS.25S220A is a reliable and versatile step-core relay that can be used in a wide variety of time delay applications. Its simple operation and high accuracy make it ideal for motor control applications, lighting control, time delay switching, and overload protection applications. Its adjustable time range allows for precise timing control in virtually any application.

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