Siemens B27000S01 - 70 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens B27000S01 is a 70 A, 240 V, two-pole bolt-on molded-case circuit breaker designed for dependable branch-circuit protection in panelboards and load centers. Built to deliver consistent protection in real-world electrical layouts, it excels in residential, commercial, and light-industrial settings where robust performance matters.

Why this breaker stands out

• Secure bolt-on mounting: Provides a rigid, vibration-resistant bus connection to maintain solid electrical contact over time.
• Thermal-magnetic trip unit: Delivers stable, predictable protection by combining thermal overcurrent sensing with magnetic short-circuit sensing for fast, accurate fault response.
• OEM-compatible design: Engineered to fit with matching Siemens load centers and panelboards, ensuring seamless replacements and coordinated protection.
• Versatile 2-pole protection: Ideal for 70 A circuits at 240 V, suitable for a wide range of residential, commercial, and light industrial applications.

Technical snapshot

• Manufacturer: Siemens
• Part number: B27000S01
• Type: Thermal-magnetic molded-case circuit breaker
• Amperage rating: 70 A
• Voltage rating: 240 V
• Number of poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use this breaker to protect heavy-duty residential circuits (such as workshop feeders or EV charging subcircuits), 2-pole 240 V circuits in small to mid-size commercial spaces (lighting, receptacles, and equipment), or light industrial installations requiring reliable 70 A protection. Its bolt-on mounting and Siemens compatibility make it a practical upgrade or replacement option in existing panelboards and load centers.

Tips for best results

• Install in a compatible Siemens panelboard to ensure proper fit and coordinated protection.
• Utilize the bolt-on mounting as designed to maintain a solid electrical connection and minimize vibration-related wear.
• Follow standard electrical safety practices and the manufacturer’s guidelines during installation and maintenance.