Siemens 3VA5140-4EF31-0AA0 40A 3P 600V Circuit Breaker, Bolt-On | AmpState

The Siemens 3VA5140-4EF31-0AA0 is a purpose-built circuit breaker designed to deliver reliable overcurrent protection for three-phase electrical systems. Built for panelboards, load centers, and distributed power schemes, this 40 A, 3-pole device ensures consistent protection where system uptime matters most.

Key to retrofit projects and maintenance planning, this bolt-on model maintains the familiar Siemens part number while providing a secure, straightforward installation path. Its 600 V rating supports a wide range of commercial and light industrial applications, making it a practical choice for upgrades, replacements, and service activities that require dependable, field-proven protection.

Key specifications

• Amperage: 40 A
• Poles: 3
• Voltage rating: 600 V
• Mounting type: Bolt-On
• Part number: 3VA5140-4EF31-0AA0
• Manufacturer: Siemens
• Availability: Available from AmpState

Why this model matters

For electrical distribution, a 3-pole breaker at 40 A provides precise protection for balanced three-phase circuits, safeguarding motors and other equipment from overloads. The bolt-on design streamlines retrofits and service replacements, reducing downtime and ensuring a snug, durable connection in panelboards and load centers. By sticking with the 3VA5140-4EF31-0AA0 part number, maintenance teams can maintain consistent inventories and documentation across satisfyingly similar installations.

Use cases and ideal environments

• Retrofit projects where existing installations rely on Siemens 3VA-series breakers and part-number continuity matters
• Maintenance planning for commercial and light-industrial panels needing reliable 40 A protection on 3-phase circuits
• Panelboard and load-center upgrades that require a secure bolt-on mounting solution
• Spare-part stock for service technicians who service Siemens-based electrical distributions

Practical tips for installation and compatibility

Before installation, verify that your panelboard accepts bolt-on breakers in the Siemens 3VA family and that the system voltage aligns with the 600 V rating. The bolt-on mounting provides a robust seating that simplifies field replacements and minimizes rework during maintenance cycles. If you’re uncertain about fit, AmpState can assist in confirming compatibility with your specific panel and distribution setup.