Why Are Resistors Used In Relays

Resistors are used for many reasons in electronic circuits. In accordance with ohms law if the voltage in a circuit remains the same the current will decrease if you increase the.

Resistor Relay Box Aep

Draw And Interpret Circuit Diagrams Containing Sources

12v 4 Pin Normally Open Micro Relay 20a Resistor

Selecting the most suitable metrosil component is vital to ensure that sufficient protection is provided.

Why are resistors used in relays. Add a relay to your order if you have the extra bucks to spend and are looking for a simple one and done solution. Diodes and resistors are the most common. While resistors can be bought individually they are often built in to other electrical components such as the led load resistor relays and other 12v electrical products.

The same value as in the example is ok to use. In a relay the resistor absorbs access voltage given off when the relay is activated. Also your relays are 5 volt with a minimum pull in of 375 v so you figure your relay coil as 5 volt and not the minimum pull in.

Also i thought about what ronv mentioned. This will protect any other components in the circuit from voltage spikes. The relay is potted meaning it is sealed for dust and moisture resistance while the internal resistor acts to protect against voltage spikes.

You are still using a bjt which requires a base resistor to limit the current. If you were to try and directly hook up your headlights to the headlight switch you would exceed the amperage rating of the switch melt wires and risk an electrical fire. High ohm resistors diodes or capacitors can be used for voltage suppression.

Go with resistors if youre on a budget and are comfortable with wiring or in the rare case that we dont make a relay for your particular bike. By introducing resistance into a circuit resistors can limit the amount of current that flows through the circuit. The relay you are using is a solid state which does not have a coil and therefore the diode is not required.

In some applications of high impedance relays for protection and control duties the maximum internal fault current can develop high voltages that can damage the relay insulation. No just a single 120 ohm resistor in series with each relay. A range of metrosil varistors primarily based on 150mm diameter discs has been developed to limit this voltage to a safe level.

Why not use 12 volt relay coils. Less current and less waste. Relays are usually clearly marked if a suppression diode or resistor are present.

The three most popular are. The best solution for full voltage applicable to head lamps auxiliary lamps fog horns motors for fans window lifters air conditioners heated rear windows. Relays in general are used to enable a low amperage circuit to switch on or off a higher amperage circuit like turning on your headlights.