What are the different sizes of the miniature circuit breakers

Miniature circuit breakers (MCBs) come in a variety of sizes, which are typically measured in terms of their current rating and the number of poles (single-pole, two-pole, or three-pole). Here are some common sizes of MCBs:

Current Rating:

• Small: 1-10 amps (e.g., 1A, 2A, 5A, 10A)
• Medium: 10-30 amps (e.g., 15A, 20A, 25A, 30A)
• Large: 30-63 amps (e.g., 30A, 40A, 50A, 63A)
• Extra Large: 63-125 amps (e.g., 63A, 80A, 100A, 125A)

Number of Poles:

• Single-pole (SP): One circuit, one pole
• Two-pole (2P): Two circuits, two poles
• Three-pole (3P): Three circuits, three poles

Common MCB Sizes:

• 1A-10A: Small, single-pole MCBs for low-power applications
• 15A-30A: Medium, single-pole MCBs for general-purpose applications
• 30A-63A: Large, single-pole MCBs for higher-power applications
• 63A-125A: Extra Large, single-pole MCBs for heavy-duty applications
• 2P-63A: Two-pole MCBs for two-circuit applications
• 3P-63A: Three-pole MCBs for three-circuit applications

Some examples of MCB sizes:

• 20A SP: A single-pole MCB with a current rating of 20 amps
• 40A 2P: A two-pole MCB with a current rating of 40 amps
• 100A 3P: A three-pole MCB with a current rating of 100 amps

Keep in mind that MCB sizes may vary depending on the manufacturer and the specific application. It's essential to choose the correct MCB size for your specific needs to ensure safe and reliable operation.