1887100-3

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Power Relays, Over 2 Amps

1887100-3, or “power solid state relay”, is a device that is used to control circuits with a voltage up to 250V and a current up to 3 amperes. In essence, it is a type of switch that is triggered by an electrical current. The main components of the 1887100-3 solid state relay are a thermistor, an n-channel FET (field effect transistor) switch, a microcontroller, and a signal conditioning circuit.

Application Field

The 1887100-3 is specifically designed for switching loads that require high switching speed, such as lighting, air-conditioning, and motor control. It can also be used in industrial process control applications, where its fast response time enables quick response to process changes. It is particularly useful in medical equipment control, as it is able to switch on and off quickly, making it possible to quickly adapt the machine to the specific conditions.

Working Principle

The working principle of the 1887100-3 is simple. It uses a thermistor to measure the temperature, then sends the signal to the microcontroller. The microcontroller then sends the signal to the FET, which switches the voltage from the signal conditioning circuit. When the current is above the set value, the FET will turn on and the voltage is passed through the circuit. When the current is below the set value, the FET will turn off and the voltage is blocked.

Advantages

The 1887100-3 solid state relay is extremely reliable and the switching frequency can be controlled accurately. Furthermore, since the relay has no moving parts, it is highly resilient to electrical noise and vibration. The relay also features low power consumption, allowing it to be used in energy-sensitive applications. It is also very easy to install and requires minimum maintenance, making it suitable for use in harsh environments.

Disadvantages

The 1887100-3 solid state relay is not suitable for switching high-current loads, as the FET has limited current handling capacity. It is also expensive compared to traditional electromechanical relays, and may require additional cooling measures if operated for extended periods of time.

Conclusion

The 1887100-3 solid state relay is a reliable and cost-effective solution for controlling circuits with up to 3 amperes of current. It is highly efficient and features a fast switching speed, making it suitable for use in many industrial and medical applications. However, it is important to consider the disadvantages, especially the limited current handling capacity and potential cooling issues, before making an informed decision.

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