Relays are an essential component in modern day electronics, facilitating the switching of power from one circuit to another. A 5 pin micro relay is a type of relay that is small in size, but has a lot of functionality. In this article, we will explore the wiring diagram for a 5 pin micro relay in detail, along with some frequently asked questions.
What is a 5 Pin Micro Relay?
A 5 pin micro relay is a type of relay that has only five pins, hence its name. The pins are used to connect the relay to various electrical circuits, allowing for the switching of power from one circuit to another. Micro relays are typically much smaller in size than conventional relays, making them ideal for use in smaller electronic devices and appliances.
Types of 5 Pin Micro Relays
There are two types of 5 pin micro relays – Normally Open (NO) and Normally Closed (NC). The NO relay has an open circuit when not activated, and when activated, closes the circuit. The NC relay, on the other hand, has a closed circuit when not activated, and when activated, opens the circuit.
Uses of 5 Pin Micro Relays
5 pin micro relays are commonly used in automotive and industrial applications, such as in power windows, door locks, starter motors, and fuel pump circuits. They are also used in various household appliances, such as refrigerators, air conditioners, and washing machines.
Wiring Diagram for a 5 Pin Micro Relay
The wiring diagram for a 5 pin micro relay is as follows:
| Pin | Description |
|---|---|
| 85 | Coil Ground |
| 86 | Coil Positive |
| 87 | Normally Open Contact |
| 87a | Normally Closed Contact |
| 30 | Power Source |
The coil of the relay is connected between pins 85 and 86. When a voltage is applied across these pins, it energizes the coil, causing the contacts to switch. Pin 87 is the normally open contact, which is connected to the load. When the relay is activated, it closes the circuit and allows power to flow to the load. Pin 87a is the normally closed contact, which is connected to ground. When the relay is activated, it opens the circuit and disconnects the load from ground. Pin 30 is the power source, which is connected to the positive terminal of the battery or other electrical source.
Frequently Asked Questions about 5 Pin Micro Relay Wiring Diagrams
Q. Can a 5 pin micro relay be used as a SPDT switch?
A. Yes, a 5 pin micro relay can be used as a Single Pole Double Throw (SPDT) switch. The normally open (NO) and normally closed (NC) contacts are used to switch between two different circuits.
Q. How do I test a 5 pin micro relay?
A. To test a 5 pin micro relay, you will need a multimeter. Set the multimeter to continuity mode and check for continuity between pins 87 and 30. If there is no continuity, activate the relay and check for continuity again. If there is still no continuity, the relay may be faulty and will need to be replaced.
Q. Can a 5 pin micro relay be wired in reverse?
A. No, a 5 pin micro relay cannot be wired in reverse. The coil must always be connected between pins 85 and 86, and the load must always be connected between pins 87 and 30.
Q. What is the maximum current rating for a 5 pin micro relay?
A. The maximum current rating for a 5 pin micro relay varies depending on the manufacturer and model. Typically, they have a current rating of between 10-30 amps.
Q. Can a 5 pin micro relay be used to switch AC voltage?
A. Yes, a 5 pin micro relay can be used to switch AC voltage, as long as the voltage and current rating of the relay are suitable for the application.
Conclusion
A 5 pin micro relay is a versatile and compact relay that has a variety of uses in modern day electronics. Understanding the wiring diagram for a 5 pin micro relay is essential for anyone who deals with electronics, as it allows for the correct installation and usage of the relay. By following the guidelines provided in this article, you can ensure that your 5 pin micro relay is wired and used correctly, and functions optimally.
