12v relay datasheet

1. What is the specification of 12V relay?
2. How many volts can a 12V relay handle?
3. How does a 12V relay work?
4. What is the resistance of a 12V relay?
5. How many amps does a 12v relay draw?
6. What is L1 and L2 in a relay?
7. Are all 12V relays the same?
8. Can I use a 24V relay in a 12V system?
9. Do relays need AC or DC?
10. What are the 3 main parts of a relay?
11. How do you test a 12 volt relay?
12. What is the basic principle of relay?
13. What is standard rating of relay?
14. What is the voltage drop specification for a relay?
15. Are all 12 volt relays the same?
16. How do I know what size relay I need?
17. Do relays need AC or DC?

What is the specification of 12V relay?

12V SPDT Relay Specifications:

Trigger Current (Nominal current) : 100mA. Maximum AC load current: 7A @ 250/125V AC. Maximum DC load current: 10A @ 30/28V DC. Maximum switching: 300 operating/minute (mechanically)

How many volts can a 12V relay handle?

In the datasheet, the pull-in voltage is listed as 80% of the nominal voltage. The nominal voltage of a 12V relay is 12V, so 80% of this is 12 x 0.8 = 9.6V.

How does a 12V relay work?

Relays install between the power source and the electrical accessory requiring on/off power. When the relay is energized, the high current to operate the accessory flows from the power source, through the relay, and directly to the part.

What is the resistance of a 12V 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.

How many amps does a 12v relay draw?

Current rating

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.

What is L1 and L2 in a relay?

1. The two vertical lines that connect all devices on the relay logic diagram are labeled L1 and L2. The space between L1 and L2 represents the voltage of the control circuit. 2. Output devices are always connected to L2.

Are all 12V relays the same?

The problem is, not all relays are the same. Many relays, if installed for the wrong application, could and will cause a short (Internal Relay Circuit) and most likely cause functionality issues or even damage to the vehicle computer systems.

Can I use a 24V relay in a 12V system?

Alternative Use: Operate 24V Relays from 12-13.8V

Once the relay has pulled in, most “24V” relays will hold in quite satisfactorily on 12V or even less. So there's actually no need for a continuous 24V supply – all you really need is that first short pulse.

Do relays need AC or DC?

The operating voltage of a relay is generally in DC. Small signal relays and low voltage power relays are usually in DC, but mains control relays and contactors quite frequently have AC coils. The rest of the terminals of a relay are used to connect either a AC(generally 50/60Hz) or DC circuit.

What are the 3 main parts of a relay?

A relay contains a coil, an armature, and at least one pair of contacts. Current flows through the coil, which functions as an electromagnet and generates a magnetic field. This pulls the armature, which is often shaped as a pivoting bracket that closes (or opens) the contacts.

How do you test a 12 volt relay?

The only tool required to check a relay is a multimeter. With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located).

What is the basic principle of relay?

Relay works on the principle of electromagnetic induction. When the electromagnet is applied with some current, it induces a magnetic field around it.

What is standard rating of relay?

Relays often have two ratings: AC and DC. These ratings 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 125 V AC can also switch 2.5 Amps at 250 V AC.

What is the voltage drop specification for a relay?

Maximum allowable voltage drop for any relay or switch contact is 300mV (. 300V).

Are all 12 volt relays the same?

The problem is, not all relays are the same. Many relays, if installed for the wrong application, could and will cause a short (Internal Relay Circuit) and most likely cause functionality issues or even damage to the vehicle computer systems.

How do I know what size relay I need?

An easy way to determine the limit of a relay is to multiply the rated Volts times the rated Amps. This will give you the total watts a relay can switch. Every relay will have two ratings: AC and DC. You should determine the AC watts and the DC watts, and never exceed these ratings.

Do relays need AC or DC?

The operating voltage of a relay is generally in DC. Small signal relays and low voltage power relays are usually in DC, but mains control relays and contactors quite frequently have AC coils. The rest of the terminals of a relay are used to connect either a AC(generally 50/60Hz) or DC circuit.