Siemens HED43B080 Molded Case Circuit Breaker | 80A 3-Pole 480V Bolt-On

Siemens HED43B080 – 80 Amp 3-Pole 480V Bolt-On Molded Case Circuit Breaker

The Siemens HED43B080 is a heavy-duty thermal magnetic molded case circuit breaker (MCCB) engineered for reliable overcurrent and short-circuit protection in commercial and industrial power distribution systems. With an 80-amp continuous rating, 3-pole configuration, and 480VAC voltage rating, this breaker is built to handle demanding three-phase applications with precision and durability.

Key Specifications

• Part Number: HED43B080
• Manufacturer: Siemens
• Type: Thermal Magnetic Molded Case Circuit Breaker (MCCB)
• Amperage Rating: 80A (80 Amps)
• Number of Poles: 3-Pole
• Voltage Rating: 480VAC
• Interrupting Capacity: 42kAIC at 480V
• Connection Type: Bolt-On
• Trip Functions: Long-Time & Instantaneous
• Series: Siemens HED (Heavy-Duty Electronic)
• Condition: Used / Tested

What Is a Molded Case Circuit Breaker (MCCB)?

A molded case circuit breaker (MCCB) is a type of electrical protection device used to safeguard circuits against overloads and short circuits. Unlike standard breakers, MCCBs offer higher current ratings, adjustable trip settings, and superior interrupting capacities — making them the preferred choice for industrial switchgear, motor control centers (MCCs), and commercial distribution panels.

Why Choose the Siemens HED43B080?

• 42kAIC Interrupting Rating: Handles high fault currents safely, protecting equipment and personnel in demanding industrial environments.
• Bolt-On Design: Provides a secure, vibration-resistant connection ideal for panelboards and switchgear requiring stable mounting.
• Thermal Magnetic Trip Mechanism: Delivers dual-mode protection — thermal elements respond to sustained overloads, while magnetic elements respond instantly to short-circuit events.
• 3-Pole Configuration: Protects all three phases simultaneously in three-phase power systems, ensuring balanced and complete circuit protection.
• Siemens Reliability: Built to ANSI/UL 489 standards, ensuring code compliance and long service life.

Common Applications

• Industrial motor protection and motor control centers (MCCs)
• Commercial and industrial panelboards
• Three-phase power distribution systems
• HVAC and mechanical equipment circuits
• Manufacturing plant electrical systems
• Switchgear assemblies and load centers

Frequently Asked Questions

What does "bolt-on" mean in a circuit breaker?

A bolt-on circuit breaker connects directly to the bus bar of a panelboard using bolts, providing a more rigid and secure connection compared to plug-in breakers. This design is preferred in high-vibration environments and heavy-duty industrial applications where a stable electrical connection is critical.

What is the interrupting rating of the HED43B080?

The Siemens HED43B080 has an interrupting capacity of 42kAIC (42,000 Amperes Interrupting Capacity) at 480V. This rating indicates the maximum fault current the breaker can safely interrupt without damage.

Is the HED43B080 compatible with Siemens panelboards?

Yes. The HED43B080 is designed for use with compatible Siemens bolt-on panelboards and switchgear. Always verify compatibility with your specific panel model before installation.

What condition is this unit in?

This unit is sold as used/tested. At Alpha Brokers & Controls, all used breakers are inspected to ensure proper functionality before listing.

About Alpha Brokers & Controls

Alpha Brokers & Controls specializes in sourcing hard-to-find, surplus, and reconditioned electrical components from trusted manufacturers like Siemens, Square D, Allen Bradley, and more. We help electrical contractors, maintenance teams, and facility managers get the parts they need — fast, reliably, and at competitive prices.