# What is the resistance of a 12 volt relay?

## What is the resistance of a 12 volt relay?

The relays are usually supplied with 12 V directly from the vehicle battery. The electrical resistance (impedance) of the coil is vary and is different depending upon the manufacturer of the relay as well as relay’s type, but in general a typical value should be expected between 50 ohms and 200 ohms.

## Will a 12 volt relay work with 6 volts?

Description. This circuit allows a 12v relay to operate on a 6v or 9v supply. Most 12v relays need about 12v to “pull-in” but will “hold” on about 6v.

How much voltage is needed to trigger a relay?

Most are rated at 12v, usually a range of 12-15v. Actual voltage required to operate the relay is usually a little under 12v. That is why your accessories can still operate with the key on and engine off, usually making actual voltage a bit under 12v with lights on.

How much current does a 12v relay need?

The current draw of the coil is not normally shown but is typically 150-200 mA with a corresponding coil resistance of around 80-60 W. Tip: Knowing the coil resistance is useful when testing the relay for a fault with a multi-meter.

### How many ohms of resistance should a relay have?

Anywhere from 50-120 ohms is OK. Out of range or open means a bad electromagnet coil winding and time for a new relay. Leave the multimeter on ohms or continuity.

### How do you check the resistance of a relay?

To check the relay coil’s resistance, take the multimeter you have and place it in the ohmmeter (Ω) setting and place the probe leads of the multimeter on the 2 terminals of the relay’s coil. It doesn’t matter which probe is placed on which terminals. Resistance isn’t polarized.

Will 5V trigger a 12v relay?

You cannot activate a 12Vdc relay with 5V.

What is 6V relay?

The 6v relay is an electromechanical switching device which controls the AC devices through the DC power. Features of Relay 6V: Max Current: 5A AC/DC (max). Max Voltage: 250V AC/30V DC. Nominal Voltage: 6V.

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## How much current is required to switch a relay?

The coil of a relay passes a relatively large current, typically 30mA for a 12V relay, but it can be as much as 100mA for relays designed to operate from lower voltages….Coil resistance.

Relay coil current = supply voltage
coil resistance

## How many amps before you need a relay?

Most automotive relays are at least 30A (check the specs to make sure). This means they can transmit 30A without issue. The fuse holder you are looking at, however, cannot handle that much amperage.

How much current is needed to energize a relay?

The relay draws 40 mA at 5V applied directly across it. It is the current required by the relay to operate. Your calculation of 40 mA is correct.

What is the minimum voltage required to run a relay?

Minimum operating voltage for your specific relay is 3.75 V. This will reduce the current drawn by the relay too. Let all the available voltage be applied across relay. If you have to reduce the overall current consumption, 3 V relay from the same family is available.

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### How many amps can a 5 AMP relay handle?

Relays often have two ratings: AC and DC. These rating indicate how much power can be switched through the relays. For instance, a 5 Amp relay rated at 125VAC can also switch 2.5 Amps at 250VAC. rated at 24VDC can switch 2.5 Amps at 48VDC, or even 10 Amps at 12VDC.

### What does the amp rating of a relay mean?

These rating indicate how much power can be switched through the relays. This does not necessarily tell you what the limits of the relay are. For instance, a 5 Amp relay rated at 125VAC can also switch 2.5 Amps at 250VAC. Similarly, a 5 Amp relay rated at 24VDC can switch 2.5 Amps at 48VDC, or even 10 Amps at 12VDC.

How much current does a 5V relay draw?

The relay draws 40 mA at 5V applied directly across it. It is the current required by the relay to operate. Your calculation of 40 mA is correct. Soon you add any resistor in series, relay will not be energised due to insufficient current.