Siemens E4B1020 Circuit Breaker, 20A, 1-Pole, 277V

The Siemens E4B1020 circuit breaker is built for industrial electrical service, maintenance, and replacement projects. With a 20A rating and a single-pole design for 277V circuits, this breaker delivers reliable overcurrent protection that helps safeguard wiring and critical equipment while minimizing unplanned downtime.

Key specs at a glance

• Amperage: 20 A
• Poles: 1
• Voltage: 277V
• Part Number: E4B1020
• Manufacturer: Siemens

Why this matters for your operation

• Precise protection for 277V circuits: A dedicated 20A, 1-pole device designed to protect individual branches in industrial panels from overloads and faults.
• Part-number precision: The exact part number E4B1020 ensures you’re selecting the right device for compatibility with your panel and system requirements.
• Industrial-ready reliability: Targeted protection for maintenance and replacement projects, helping to reduce downtime and maintenance costs over time.

Compatibility and selection guidance

• Verify fit by part number and application requirements to ensure correct installation and reliable performance in your specific panel configuration.
• If you’re unsure about compatibility, message us and we’ll help confirm that the E4B1020 is the right choice for your equipment and voltage needs.

Practical use cases

• New installations in industrial control panels where 277V circuits require dependable overcurrent protection.
• Maintenance or replacement projects that demand matching trip characteristics and a familiar Siemens part for easier serviceability.
• Panel upgrades or retrofits where standardized components simplify spare parts management and future servicing.

Notes: Always verify fit by part number and application requirements. If you need help matching a part number or confirming compatibility, message us and we’ll assist in identifying the exact device your system needs.