PX21-SSR15H-A

Series:	*
Part Status:	Obsolete

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The PX21-SSR15H-A is a type of solid state relay (SSR) that is suitable for AC loads. It has a voltage range of 12 - 380 VAC and a current range of 5 - 15 A. It can be used in a wide variety of applications, from light-duty industrial applications to residential applications. The PX21-SSR15H-A is a single-phase SSR with zero-crossover zero-voltage (ZCR) switching capability. A solid state relay (SSR) is an electronic device that uses a semiconductor to control power. It is an alternative to traditional relay control systems, which use mechanical contacts to switch power on and off. SSRs are faster and more efficient than standard electromagnetic relays, and they are more resistant to vibration and shock.A single-phase SSR is used to control the switching of AC loads. It consists of a single switching element connected in series with the AC load. When switched on, the switching element allows current to flow through the load for a predetermined amount of time, typically between 1ms and 1s.The PX21-SSR15H-A has a ZCR switching capability, which means that it switches between the on and off states at zero-crossing points on the AC waveform. This eliminates the possibility of electromagnetic interference (EMI) that is caused by voltage spikes when relays switch off at non-zero-crossing points. The ZCR feature also helps reduce power consumption and required response time.In addition, the PX21-SSR15H-A has a wide operating temperature range of -20 to +85°C and an insulation resistance of >100 MΩ at 500 VAC, making it suitable for a range of industrial applications. It is also certified to UL and EN 60950-1 safety standards, making it a safe and reliable solution for commercial and residential applications.The PX21-SSR15H-A is primarily used to control the switching of AC loads, such as in HVAC systems or small motors. It can be used in conjunction with AC current sensors to monitor and control the current consumption of the system. It can also be used to control switching devices such as lighting fixtures or small appliances. Finally, it can be used in security systems as a reliable and efficient means of controlling door locks and other access control devices.The working principle of a single-phase SSR is fairly simple. When an input voltage (typically 0-5V) is applied to the relay\'s control terminals, current flows through the semiconductor switching elements, which activates the relay. This causes the switching element to “close” and allows current to flow through the load. The load will remain powered until the input voltage is removed from the control terminals, at which point the switching element will “open” and the current flow will be interrupted. In summary, the PX21-SSR15H-A is a single-phase solid state relay suitable for AC loads with a wide voltage range. It is designed with ZCR switching capability to reduce power consumption and prevent EMI, and can be used in a variety of applications from commercial to residential. The SSR works by applying a low voltage input to the relay’s control terminals, which causes the switching element to either close or open depending on the state of the input.

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