Difference Between Double Pole and Single Pole Breaker: Simplified

The key difference between a double pole and a single pole breaker is that a single pole breaker controls one 120V circuit, while a double pole breaker controls a 240V circuit by connecting to two hot wires. 

Double pole breakers handle more power and are used for larger appliances, while single pole breakers are used for standard household outlets and lights.

Read on to learn more.

Single Pole vs Double Pole Breaker: Quick Comparison Table

How Does a Single Pole Breaker Work?

A single pole breaker is a circuit breaker that connects to one hot wire and one neutral wire, delivering 120V power. 

It trips when there is an overload or short circuit, cutting off power to the affected circuit. 

These breakers are commonly rated at 15 to 20 amps and are used for standard home electrical outlets, lighting, and small appliances.

Common Applications of Single Pole Breakers

• Indoor and outdoor lighting circuits
• Standard electrical outlets in living rooms and bedrooms
• Small appliances like TVs, coffee makers, and microwaves
• 120V circuit breakers in home electrical panels

How Does a Double Pole Breaker Work?

A double pole breaker connects to two hot wires, providing 240V power. It trips when there is an overload on either wire, making it essential for handling higher-power appliances. These breakers are commonly rated from 20A to 50A, depending on the electrical demand of the connected device.

What is a Double Pole 20 Amp Breaker Used For?

A double pole breaker 20 amp is typically used for:

• Small water heaters
• Baseboard heaters
• Well pumps
• Some air conditioning units

Higher amp-rated double pole breakers (30A, 40A, 50A) are used for large appliances like electric stoves, dryers, and HVAC systems.

Difference Between 120V and 240V Breaker

A 120V breaker (single pole) powers low-energy devices, while a 240V breaker (double-pole) supports high-energy appliances. Here’s how they compare:

• 120V Circuit Breaker: Used for outlets and lights; connects to one phase of the electrical panel.
• 240V Circuit Breaker: Used for heavy-duty appliances; connects to both phases of the electrical panel.

When to Use a Single Pole or Double Pole Breaker?

Double Pole and Single Pole Breaker: Conclusion

The difference between a double pole and single pole breaker comes down to voltage, number of hot wires, and application. 

Single pole breakers are for standard household circuits (120V, 15-20A), while double pole breakers power larger appliances (240V, 20-50A). 

Choosing the right breaker ensures safe and efficient electrical operation.

For your electrical needs, visit our miniature circuit breaker product catalog now!