How can you determine the current needed to turn on a relay coil?

There should be a datasheet that describes the operating current of your relay. An alternative is to measure the coil resistance , if you also ...

AC relay coil current calculation - Electronics Stack Exchange

I am trying to calculate the current required to energize and hold a 24 VAC relay coil while switching no load.

Easy Way to Determine the Current Load of a Relay Coil

In general it seems manufactures dont give a power factor of such a thing. So how to determine the current? A volt-ampere (VA) is the unit used ...

How much power is needed to activate a relay? - Quora

If your talking about a relay the size of an ice cube relay, then it usually requires about 100–150 ma to activate the coil on it, ...

Relay Switch Circuit - Electronics Tutorials

The advantage of relays is that it takes a relatively small amount of power to operate the relay coil. However a relay switch circuit can be used to control ...

Coil Voltage/Current: Understand Resistance in Relay Circuits

All you really need is a current probe and an oscilloscope. Anyway, to answer your question, all relays and contactors consume power because of ...

Determining Relay Coil Inductance

The inductance of AC coils may be determined by measuring coil voltage and current and actual power consumed by use of a wattmeter. The.

Measuring current used by Relay Module switching operation

The 70 mA is the current drawn by the relay coil from the 5V power source Vcc. ... Do you want to measure the current needed to switch the relay?

Understanding Relay Coil Voltage Specifications

Coil Voltage or Nominal Voltage - 12VDC - this is going to be the nominal voltage to operate your coil at. · Turn-Off Voltage (Min) - 1.2VDC - ...

What Is The Formula Of Relay Coil? |Parameters & Performance

Key parameters include coil voltage, resistance, inductance, and the current required to activate the relay. Coil voltage is the electrical potential needed ...

All You Need to Know About a Relays - Instructables

The switching and contact pins of the relay have their respective Maximum voltage and current ratings/Parameters. These Parameters are generally in-scripted on ...

Relays | Electronics Club

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 ...

What Is The Formula Of Relay Coil? - IndMALL

By using the formula I=VRI = frac{V}{R}I=RV, you can determine the current, provided you know the voltage and resistance. Correct current levels are necessary ...

Controlling current through a relay coil using resistors

You want to place a 120 Ohm (you won't find 122Ω) resistor in series with your relays. The power is voltage * current so 8.8 * .072 = .634 watt.

How Much Current Does a Relay Draw Across the 85 and 86 Pins?

As for what gauge wire to run to the relays from the battery for switched power to flow, depends on the amperage requirements of the devices ...

How Many Amps Does A Relay Coil Draw - IndMALL Automation

To calculate the current, you can use Ohm's law: I=VRI = frac{V}{R}I=RV. For example, with a 12V relay and a coil resistance of 80 ohms, the current draw would ...

5.1: Relay Construction - Workforce LibreTexts

The relay coil which produces the magnetic field may only consume fractions of a watt of power, while the contacts closed or opened by that ...

How many amps to switch a relay? - Team Chevelle

To energize the coil to make contact 30 connect with 87 it took a minimum of 6.6 volts with 0.08A to make it "click" closed. ... Any switch rated ...

Number of turns in Electromagnet for Relay - Electro Tech Online

Find the resistance (from datasheet) and diameter of wire (by measurement). Use resistance to calculate length (or weight) required. Wind required amount on ...

How Much Voltage Does a 12V Relay Need to Work - Infinispark

That means the minimum voltage required to activate this relay is 5 x 0.75 = 3.75V. ... Any relay with the coil current requirements up to 20mA ...