moulded case circuit breaker mccb full form | mcb vs mccb | mccb price

Moulded Case Circuit Breaker MCCB is an electronic device that is used in the electrical field. In electronic component protection we used the MCCB vs MCB. So, we can say that its play the important role in the electronic component field.

We used this component in day in day out during your work life. We will also be sharing with you what are the important points that you need to take note when selecting your equipment’s.

I have learned all about the MCCB by Wirekhoj and trust us it was very-very difficult. So, I share the most important points of mccb that you must know.

What is MCCB

MCCB is basically a switch that turns on and off something like a light or load. The mccb also comes in different size and frames. So, Why don’t we just use a switch? This is because mccb is able to take higher current compared with the switch.

If you want to just use a switch the high current will break the switch easily. Also, mccb is fitted with current sensors that will trip the circuit automatically. We will explain more about the current senser later in this article.

MCCB Simple Definition

MCCB is the Moulded Case Circuit Breaker. It is the modify version of the MCB. MCCB is used in the heavy current flow location. The current rating of a moulded case circuit breaker (mccb) is 100 Ampere to 1000 Ampere.

If the flowing current ratio is the lesser than 100 Ampere then never use the moulded case circuit breaker. You have using only the MCB.

MCCB Full Form

The full name or full form of the MCCB is Moulded Case Circuit Breaker. A moulded case circuit breaker is coming in two, three, four poles configuration. The MCCB full form usually comes in 10 amps to 1600 amps.

It is usually advised to use mccb full form up to a maximum of 799 amps. For 800 amps applications and above, it is recommended to select acb. The IEC Standards we refer to will be iec 60947-2 for industrials usage IEC 60898 for domestic usage.

(In) is related current value determines when the MCCB trips due to overload protection, however this will usually not be the ampere that the MCCB full form will be tripped on contrary to many misunderstood.

MCCB Explanations

Related is the current allowed to pass through the mccb indefinitely under the safest tested conditions stated in IEC 60947. We will explain the four main trip settings in the Lessig section later in this article.

You may also call (in)the ampere trip at of the mccb the (in) of a mccb can be found on the face of the mccb located at these locations.

Rated Frame Current : It is the maximum current value where the MCCB is designed, and it also used the physical dimensions of the device. The rated frame current defines as the higher limit of the adjustable trip current range.

When we see the size of the mccb then it comes with the different framed sizes. The sizes list of mccb is given below:

  • 100 AF
  • 160 AF
  • 200 AF
  • 250 AF
  • 300 AF
  • 400 AF
  • 630 AF
  • 800 AF
  • 1000 AF

So, these all the different rated framed sizes of the mccb. These sizes of mccb can supply. You may also call it the ampere frame of the mccb. By now you should be confused. So, let me explain to you in simple terms.

Ampere Frame : Imagine both (in) Ampere trip and (inm) Ampere frame in terms of a bus. Ampere frame assumed the higher capacity of the number of people that you can allow on the bus and the bus will still operate normally.

Ampere Trip : Whereas ampere trip is the number of people really in the bus at that point of time usually ampere trip will be multiplying by a factor that it can be set on the mcb to lower the current protection.

Additional Read : Efficiency Transformer

When needed because you will never know the actual site conditions hope you understand  what is ampere trip and ampere frame now. Let’s move on the to the next topic.  

What is LSIG

Before we go into what is LSIG. Let we share with you why do we need to trip the mccb.

The circuit breaker will trip to increase in current to protections or save from the loads and cables connected to it.

By stopping the current moving or flowing from them. The operations may then resolve the problem and turning the circuit breaker backward. This appliance for all other tripping occurrence.

So, basically, we trip the mccb to protect the equipment’s that are connected to it. ISIG is the four different kinds of current that make the mccb trip. So, these four different kinds of the current are given below:

  • Long Time Trip – Ir
  • Short Time Trip – Isd
  • Instantaneous Trip – li
  • Ground Trip – lg

(Lg) Long term trip is usually is the amount of current that the circuit breaker determine  that the load is taking slightly slow down then usual. Typically, 1.05 to 1.2 times(Adjustable). As the name Long Times is suggest that the mccb will tripping after the present time delay tr.

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MCCB Working

As we know that it is the advance version of the MCB. So, in the MCCB have the advance feature that you never shown in the MCB. The advance feature name of the MCCB is Slant Trip or Remote Location Trip.

The prices of the moulded case circuit breaker are high in cost. You can set the any variable of the current in it. So, these are the more advantages of the moulded case circuit breaker.

Additional Read : Electric Circuit

Difference Between MCB and MCCB (MCB vs MCCB)

So here we justify the Difference Between MCB and MCCB (MCB vs MCCB) in full details. What are the advance features in the MCCB? So, the different types of the features or Difference Between MCB and MCCB (MCB vs MCCB) is given below:

MCB : MCB is a miniature circuit breaker which is used to break small currents. Like in domestic LT Circuits. The ratings may be end up to 100 Ampere.

MCCB : MCCB is a moulded case circuit breaker which has a rugged construction as it can break larger current usually from 100 to 1000 Ampere.

Sr. No.

MCB (Miniature Circuit Breaker)

MCCB (Moulded Case Circuit Breaker)


MCB Stand for Miniature Circuit Breaker.

MCCB stands for Moulded Case circuit Breaker.


Miniature Circuit Breaker are rated current under 100 Ampere.

MCCB are rated current in the range of 10 to 2500 amps.


Miniature Circuit Breaker are interrupted ratings as around 18000 amps.

MCCB are interrupting ratings may be around 10,000 to 2,00,000.


MCB trip characteristics may not be adjusted.

MCCB are thermal operated for overload and magnetic operation for instant trip in short circuit conditions.


Miniature Circuit Breaker are Suitable for low current Circuits, like home wiring etc.

MCCB is designed for the high-power rating and high energy, like commercial and industrial use.


MCB is vernally used for low current flow where the normal current is less than 100 Amperes.

MCCB is used where normal current is more than 100 Ampere.


MCB gives you in the minimum cost of price.

MCCB gives you in the maximum cost of the price.

Additional Read : Electrical Items List

So, this is the Difference Between MCB and MCCB (MCB vs MCCB). Hope you like our difference. Now we move to the next topic that is the mccb symbols.

MCCB Symbol

As we know that every electronic device those are present in the electric field have the unique symbols. So, MCCB have an electric symbols.

So, there is an image of the MCCB Symbol. Moulded Case Circuit Breaker Symbol is given below that are as follows:

mccb symbol

So, Guys this is the MCCB Symbol or Moulded Case Circuit Breaker Symbol. Now we are moving to the next topic.

MCCB Price

Guys, there we provide you to the best mccb price. The prices may be changing time to time. These prices are taken down from the various kinds of the e-commerce website. The mccb price are as follows in the given below table.

Sr. No.

Product Name



Schlender 100 A 3 POLE MCCB LV510307

Rs. 3981



Rs. 4520


125AMP 4P MCCB 16kA LEGRAND 420016

Rs. 4900



Rs. 18178


Legrand Plastic 125A 25kA 3 Pole MCCB (White)

Rs. 5750


ARINO LV4 NSX MCCB 200A 3 Pole Heavy Industrial Duty (100% Copper Terminal

Rs. 8999



Rs. 28100

So, guys this is the price of the mccb in the market. This price may be increase or decrease time to time. Now you can take the idea of the mccb price.


So, guys the final conclusion is that the mccb is the advance features of the mcb. MCCB used those places where the heavy current flow. So, upper article has the all small and vast information related with the mccb.

Here we study of define about MCB, MCCB (Moulded Case Circuit Breaker), MCCB Full form, MCB Principle, LSIG, MCCB Working and MCCB Symbol.

Also, we learn about the difference between MCB and MCCB (mcb vs mccb) and mcb price. So, these all things we cover in this single checklist of the moulded case circuit breaker.

If you like or enjoy our article then please share this article with your friends and relatives. If you have any query related with the mccb then please connect us via comment section.

FAQ Related With MCCB (Moulded Case Circuit Breaker)

Q.1. What is MCCB?

MCCB is the Moulded Case Circuit Breaker. It is the modified version of the MCB. MCCB is used in the heavy current flow location. The current rating of a molded case circuit breaker (mccb) is 100 Ampere to 1000 Ampere.

Q.2. What is the AF and AT terms that are used in the MCCB?

AF stands for Ampere Frame whereas AT stands for Ampere Trip.

Q.3. What is the full form of the MCCB?

The full form of MCCB is Moulded Case Circuit Breaker.

Q.4. What is the difference between MCB and MCCB?

MCB : MCB is a miniature circuit breaker that is used to break small currents. Like in domestic LT Circuits. The ratings may end up to 100 Ampere.

MCCB: MCCB is a molded case circuit breaker that has a rugged construction as it can break larger currents usually from 100 to 1000 Ampere.

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