Siemens HE42B020 20A 2-Pole 480 V Circuit Breaker

Siemens HE42B020 is a robust 20A, 2-pole, 480 V circuit breaker designed to protect industrial and commercial electrical systems. With the part number HE42B020, this breaker fits Siemens panels and other compatible distribution boards, delivering reliable overcurrent protection where it matters most.

What it is and how it works

This is a two-pole device that interrupts both hot legs in a 480 V circuit, providing synchronized disconnection during overloads or faults. The 20 A current rating ensures circuits stay within safe limits, while the 480 V rating covers high-voltage applications typical in industrial environments. In short, it helps prevent wiring damage, protects motors and controls, and reduces the risk of fire from electrical faults.

Key specifications

• Current rating: 20 A
• Poles: 2-Pole
• Voltage rating: 480 V
• Part Number: HE42B020

Why this Siemens breaker stands out

• Direct compatibility with Siemens panels and distribution systems, simplifying replacements and upgrades.
• Designed for reliable protection in 480 V circuits, making it suitable for motor loads, HVAC equipment, and industrial controls.
• Clear part identification with a precise specification footprint for maintenance records and service planning.

Ideal use cases

• motor control circuits in manufacturing facilities powered by 480 V
• Protection for 480 V distribution panels in warehouses or data center support infrastructure
• HVAC and large machinery circuits that operate at high voltage
• Panel upgrades where upgrading to a modern Siemens 2-pole 480 V circuit breaker is advantageous

Installation and practical notes

Install according to local electrical codes and the equipment manufacturer’s guidelines. Ensure the breaker is compatible with your panel’s design and follow proper torque and safety practices during mounting. The 2-pole design ensures simultaneous isolation of both hot lines, which is essential for safely servicing high-voltage equipment.

For dependable, precise protection in demanding electrical environments, the Siemens HE42B020 20A 2-Pole 480 V circuit breaker delivers clear performance benefits, straightforward replacement, and compatibility with Siemens-compatible systems.