Pemutus litar dan suis utama itu rosak.

In Malay, demonstratives such as ini (this) and itu (that/the) usually come after the noun.

So:

• suis utama itu = that main switch / the main switch
• pemutus litar itu = that circuit breaker / the circuit breaker

In this sentence, itu comes after the whole coordinated noun phrase:

• Pemutus litar dan suis utama itu

This is very natural in Malay word order.

In normal reading, itu refers to the whole phrase, so it means:

• the circuit breaker and the main switch or
• that circuit breaker and main switch

So yes, it is understood as covering both items together.

If a speaker wanted to make each one explicitly definite, they could repeat itu, but that is not necessary here.

Malay often leaves out the verb to be in sentences like this.

English:

• The circuit breaker and the main switch are broken.

Malay:

• Pemutus litar dan suis utama itu rosak.

There is no separate word for are. This is completely normal. The structure is simply:

• subject + predicate

Here:

• Pemutus litar dan suis utama itu = subject
• rosak = predicate

Rosak is usually understood as a stative word meaning broken, damaged, faulty, or out of order.

For an English speaker, the easiest way to think of it is as something like an adjective in a sentence such as:

• The machine is broken.
• Mesin itu rosak.

Malay does not always separate adjectives and verbs in the same way English does, so rosak can behave a bit differently from what you might expect in English grammar.

Because in Malay, modifiers often come after the noun.

So:

• suis utama = main switch
  • suis = switch
  • utama = main / principal

This is the normal Malay pattern:

• noun + adjective/modifier

Other examples:

• rumah besar = big house
• jalan utama = main road

It is a compound noun made up of two words:

• pemutus = breaker / something that breaks or cuts off
• litar = circuit

Together:

• pemutus litar = circuit breaker

Malay often builds technical terms this way, using two words that function together as one unit of meaning.

Malay usually does not mark plural in the same way English does.

English shows plural clearly:

• switches
• are

Malay often leaves the noun unchanged:

• suis can mean switch or switches, depending on context

In this sentence, plurality is already clear because of dan (and):

• pemutus litar dan suis utama = two separate items

So no extra plural marking is needed.

Normally, no. The natural reading is that both the circuit breaker and the main switch are broken.

Because the subject is joined by dan (and), the predicate rosak applies to the whole combined subject.

So the default meaning is:

• Both are broken.

If the speaker wanted to say only one was broken, they would usually say it more explicitly.

It can cover all of those, depending on context.

Rosak is a broad everyday word that can mean:

• broken
• damaged
• faulty
• not functioning properly

For electrical equipment like pemutus litar and suis, English translations such as broken or faulty are both possible.

Yes. In many contexts, itu can sound like either that or the in English, depending on how specific or contextually known the thing is.

So this sentence could be understood as:

• That circuit breaker and main switch are broken or more naturally in many cases:
• The circuit breaker and the main switch are broken

Malay does not have articles exactly like English the and a, so itu often helps mark something as specific.

You would usually use tidak before rosak:

• Pemutus litar dan suis utama itu tidak rosak.

That means:

• The circuit breaker and the main switch are not broken.

So the pattern is:

• subject + tidak + predicate

Yes. Adding telah gives a sense of has/have become or has/have already become broken:

• Pemutus litar dan suis utama itu telah rosak.

This can sound slightly more explicit about the change of state.

Compare:

• ... itu rosak = ... is/are broken
• ... itu telah rosak = ... has/have become broken / is/are already broken

Both are possible, but the shorter sentence is very natural.

It is perfectly normal and natural, and it works in both everyday and fairly neutral written Malay.

The vocabulary is straightforward:

• pemutus litar = a technical noun
• suis utama = common technical/everyday expression
• rosak = very common everyday word

So the sentence sounds natural in practical contexts such as maintenance, repairs, or inspections.